EA033949B1 - Progressive spectacle lens, method of manufacturing a progressive spectacle lens and method of designing a progressive spectacle lens - Google Patents

Abstract

A progressive spectacle lens is provided which includes an upper viewing zone (7) with a distance reference point (2A) providing a first refractive power, in particular a first mean refractive power, adapted to distance vision; a lower viewing zone (5) with a near reference point (3A) providing a second refractive power, in particular the second mean refractive power, adapted to near vision, the second refractive power, in particular the second mean refractive power, representing an addition power relative to the first refractive power, in particular the first mean refractive power; a corridor (6) between the upper viewing zone (7) and the lower viewing zone (5) in which the refractive power gradually changes from the first refractive power, in particular the first mean refractive power, to the second refractive power, in particular the second mean refractive power; and a left peripheral zone (4L) and a right peripheral zone (4R) which are separated by the corridor and the lower viewing zone (5). Low mean power zones (10, 11, 12) are present in the upper viewing zone (7), the left peripheral zone (4L) and the right peripheral zone (4R) where the mean refractive power does not exceed the first refractive power, in particular the first mean refractive power, plus 0.125 D in said low mean power zones (10, 11, 12). In addition, the low mean power zones (10, 11, 12) may occupy at least 40% of the area of the progressive spectacle lens.

Description

The present invention relates to a progressive spectacle lens for combating myopia. In addition, the present invention relates to methods for manufacturing and computer-aided design of progressive eyeglass lenses.

To ensure clear vision, the eye must be able to focus light on the retina. The ability of the eye to focus light on the retina depends largely on the shape of the eyeball. If the eyeball is too long relative to the focal length on the visual axis of the eye, an image of a distant object will be formed in front of the retina, this condition is called myopia. As a result, such an eye, called the myopic eye, will have difficulty focusing distant objects on the retina.

Typically, glasses with scattering lenses designed to increase the focal length so that the image of a distant object is formed on the retina are used to correct myopia.

In many countries of East Asia, myopia has reached epidemic proportions at which some major urban centers report a near-100% occurrence of myopia among 18-19 year olds (Jung SK et al., Prevalence of myopia and its association with the body stature and educational level in 19- year-old male conscripts in Seoul, South Korea, Invest Ophthalmol Vis Sci. 2012, 53, 5579-5583). It has been estimated that there were approximately 2 billion people with myopia in the world in 2010, and some recent epidemiological models suggest that this figure will increase to 5 billion in 2050 (Holden BA et al, Global Prevalence of Myopia and High Myopia and Temporal Trends from 2000 through 2050, Ophthalmology 2016, in print). In addition, there is a growing tendency for adolescents to develop high myopia (defined as SER <-5.00 diopters, where SER is the spherical equivalent of refraction), which essentially increases the risk of eye diseases such as cataracts, glaucoma, retinal detachment and myopic maculopathy, which all can cause permanent vision loss (Wong TY et al., Epidemiology and disease burden of pathologic myopia and myopic choroidal neovascularization: an evidence-based systematic review. Am J Ophthalmol 2014, 157: 9-25.e12). Epidemiological models predict high global myopia growth from about 300 million in 2010 to 1 billion in 2050 (Holden BA et al., Global Prevalence of Myopia and High Myopia and Temporal Trends from 2000 through 2050, Ophthalmology 2016, in print). This will inevitably lead to very high costs for society in the treatment of visual impairment and reduced labor productivity.

Bifocal and progressive lenses have been clinically tested to reduce the delay in accommodation during near vision tasks, which is considered one of the main causes of myopia in adolescents, which usually coincides with the start of schooling. Some of these trials failed (e.g., Edwards MH et al., The Hong Kong progressive lens myopia control study: study design and main findings, Invest Ophthalmol Vis Sci. 2002, 43, 2852-2858), while others indicated significant slowing myopia in the first year with saturation in long-term trials (e.g. Gwiazda J. et al., A randomized clinical trial of progressive addition lenses versus single vision lenses on the progression of myopia in children, Invest Ophthalmol Vis Sci. 2003, 44,14921500, Hasebe S. et al., Myopia control with positively aspherized progressive addition lenses: a 2-year, multicentre randomized, controlled trial, Invest Ophthalmol Vis Sci. 2014, 55, 7177-7188). The saturation problem may exist due to a kind of adaptation of the characteristics of vision to prevent the use of additional refraction or the adaptation of the accommodation system to the presence of additional refraction, which leads to a weakening of the accommodation effort. There is a need to improve the designs of PAL (Progressive Complementary Lens) in order to provide a more effective reduction in accommodation delays and possibly help overcome saturation of their effectiveness to combat the development of myopia.

A progressive eyeglass lens is typically formed by providing a half-finished piece of preformed lens material, i.e. semi-finished lens blanks. The semi-finished lens blank has a completed lens surface with a specific surface curvature on the front or rear surface, while the other surface is not yet complete. On a surface not yet completed, an arbitrary shape surface is formed. In this context, the term “arbitrary-shaped surface” means a surface that can be created using piecewise defined functions, such as splines, for example, and typically demonstrates no point symmetry or axial symmetry. Due to the formation of a surface of arbitrary shape, a progressive eyeglass lens is provided by the upper visual zone, i.e. a part having a first refractive ability for distance vision, a lower visual zone, i.e. a part having a second refractive power for near vision, and a corridor, i.e. part of providing clear vision for the ranges of refractive power between the first and second refractive power. However, it is also possible that the raw element, i.e. an element without any completed lens surface will be used to form a progressive eyeglass lens. Throughout the present description, the term lens blank should encompass a semi-finished lens blank as well as an untreated lens.

US 8162477 B2 discloses a progressive ophthalmic eyeglass lens for correction of 1,033949 myopia. This progressive ophthalmic eyeglass lens contains an upper region in which the correction is adapted to the peripheral vision of the wearer.

EP 2069854 B1 describes a progressive ophthalmic eyeglass lens in which the average additional refraction over the entire peripheral region is positive and over all radial extensions greater than 20 mm from the geometric center of the progressive ophthalmic eyeglass lens, is in the range from 0.50 to 3.00 dptr.

EP 1034453 B1 describes a progressive ophthalmic eyeglass lens with an intermediate corridor length of 15 mm or less.

US 8807747 B2 describes a progressive complementary type lens designed for children with myopia. For this purpose, an ergorama was created taking into account the visual conditions faced by children in their daily lives. In particular, the lens has a limited increase in refraction between the two basic directions of the eyes, the beginning of the increase in refraction, which is located quite low in the lens, and the offset value for the meridian line, which is higher than that of lenses designed for adults.

No. 8,833,936 B2 describes a progressive eyeglass lens comprising an upper visual area, a lower visual area, a corridor and a peripheral portion located on each side of the lower visual area. The upper visual zone contains the base point for the distance and the crosshairs of fixation and provides the first refractive power for distance vision. The lower visual zone, which is intended for near vision, provides additional refraction relative to the first refractive power. The corridor connects the upper and lower zones and provides a refractive power that varies from the refractive power of the upper visual zone to the refractive power of the lower visual zone. Each peripheral section contains a zone of positive refraction relative to additional refraction, which provides a positive refractive power in it relative to the refractive power of the lower visual zone. Zones of relative positive refraction are located directly next to the lower visual zone so that the lower visual zone is located between the zones of relative positive refraction.

Most of the traditional progressive eyeglass lenses currently available on the market try to provide a fairly wide near field of view with a smooth distribution (gentle gradients) of average additional refraction at the bottom of the eyeglass lens, minimizing the size and depth of the peripheral areas of refraction attenuation on both sides of the zone near view.

WO 97/26579 A1 describes a method for determining a composite progressive refractive surface by applying a soft and rigid structure. WO 97/26579 A1 shows rigid structures and a composite structure with regions in the visual area for the distance, the left peripheral zone and the right peripheral zone in which the average refraction does not exceed 0.130 diopters.

WO 2011/054058 A1 describes a progressive ophthalmic eyeglass lens for correcting myopia. A progressive ophthalmic eyeglass lens contains peripheral areas in which peaks with average additional refraction exceeding the additional refraction at the base point for the near are located directly next to the near part of the progressive ophthalmic eyeglass lens. These peaks are laterally separated by a distance of at least 20 mm. Even further, the average additional refraction can drop sharply to very low values and can even become negative.

Based on WO 2011/054058 A1, an object of the present invention is to provide a progressive spectacle lens for controlling myopia, which provides a more effective fight against myopia by eliminating or at least a greater reduction in accommodation delays during near vision tasks. Another objective of the present invention is to provide an advantageous method for manufacturing a progressive spectacle lens and an advantageous method for designing progressive spectacle lenses.

The first goal is achieved through the progressive spectacle lens stated in paragraphs 1, 21, 22, 28 and 31, the second goal is achieved through the design method of the progressive spectacle lens stated in paragraph 18, and the third goal is achieved through a computer-implemented design method progressive spectacle lenses, as claimed in paragraphs 19, 23, 24, 25, 29 and 32. The dependent paragraphs contain further improvements of the present invention.

Before turning to the present invention, below will be an explanation of some of the expressions used in the description.

A toroidal surface is a surface having mutually perpendicular main meridians of unequal curvature, the cross section of which is nominally round in both main meridians.

The term spectacle lens should include all forms of individual refractive optical bodies used in ophthalmology, including, but not limited to, spectacle lenses, spectacle lenses adapted to a particular spectacle frame, or spectacle lenses before polishing.

The term fixation point refers to that point on the front surface of the lens or half-finished

- 2 033949 lens blanks, which is set by the manufacturer as the base point for placing the lens in front of the eye.

The term line of sight means a line connecting the center of the central fossa with the center of the exit pupil of the eye, and its continuation from the center of the entrance pupil in the forward direction into the space of objects.

The term home position means the position of the eye relative to the head, looking straight ahead at the object at eye level.

The term pantoscopic angle means the angle in the vertical plane between the normal to the front surface of the spectacle lens in its center bounded by the frames, i.e. at the intersection of the horizontal and vertical center lines, and the line of sight of the eye in the initial position, usually considered horizontal (see section 6.18 of DIN EN ISO 13666: 2013-10).

The term angle of coverage or front angle means the angle between the plane of the front side of the glasses and the plane of the shape of the right lens or the shape of the left lens (see section 17.3 of DIN EN ISO 13666: 2013-10). The right or left front angle is considered positive if the temporal side of the plane of the right or left lens is closer to the head than the plane of the front side of the glasses. The right and left front angles may differ, but in practice the front angle is often measured and indicated as the average of the right and left front angles.

The term wearing position means the position and orientation of the glasses relative to the eyes and face while wearing, and includes at least values for the distance between the center of rotation of the eye and the rear vertex point of the lens, the angle of coverage and pantoscopic angle. In the present invention, the wearing position is set by a combination of a specific value for the distance between the center of rotation of the eye and the rear vertex point of the lens, a specific value for the angle of coverage and a specific value for the pantoscopic angle, while the specific value for the distance between the center of rotation of the eye and the rear vertex point of the lens can be a value taken from the range from 20 to 30 mm, a specific value for the angle of coverage can be a value taken from the range from -5 to + 15 °, and a specific value for the pantoscopic angle can be a value taken from the range of -20 to + 30 °.

According to a first aspect of the present invention, the progressive eyeglass lens according to the present invention, which can be individually adapted to a specific wearing position for a wearer, comprises an upper visual zone, a lower visual zone, a corridor between the upper visual zone and the lower visual zone, and left and right peripheral zones. The left peripheral zone and the right peripheral zone are separated by a lower visual zone and a corridor. A particular wearing position may be either an individual wearing position, i.e. the wearing position obtained for an individual carrier, or the standard wearing position, which is the average wearing position for a particular media contingent. The standard wearing position may vary in different markets, for example, the standard values of the pantoscopic angle and angle of coverage in Asia may differ from those in Europe due to differences in the physical characteristics of the faces of Asians and Caucasians.

The upper visual zone contains a base point for the distance, providing the first refractive power in a particular wearing position, in particular the first average refractive power adapted for distance viewing, hereinafter referred to as the distance refractive power, and the lower visual zone contains the base point for proximity, providing in a specific wearing position, the second refractive power, in particular the middle second refractive power, adapted for near vision. The second refractive power, in particular the second average refractive power, hereinafter referred to as near-field refractive power, represents additional refraction relative to the first refractive power, in particular the first average refractive power (or refractive power for distance), i.e. additional refraction is the difference between the second refractive power, in particular the second average refractive power, and the first refractive power, in particular the first average refractive power. In the corridor between the upper visual zone and the lower visual zone, the refractive power gradually changes in the specific wearing position from the refractive power for distance to the refractive power for near, i.e. additional refraction varies from 0 to additional refraction, providing refractive power for the near.

According to the present invention, zones of small medium refraction are present in the upper visual zone, the left peripheral zone and the right peripheral zone. The distance, preferably the horizontal distance, between the zone of low average refraction in the left peripheral zone and the zone of low average refraction in the right peripheral zone preferably does not exceed 25 mm and in some embodiments of the present invention preferably does not exceed 20 mm. The distance between the zone of small average refraction in the left peripheral zone and the zone of small medium refraction in the right peripheral zone is the minimum distance between the circuit 0.125 in the left peripheral zone and the circuit 0.125 in the right peripheral zone, i.e. the length of the shortest straight line that can be drawn between the 0.125 diopters in the left peripheral zone and

- 3 033949 with a contour of 0.125 diopters in the right peripheral zone. The horizontal distance between the zone of small average refraction in the left peripheral zone and the zone of small medium refraction in the right peripheral zone is the minimum horizontal distance between the circuit 0.125 in the left peripheral zone and the circuit 0.125 in the right peripheral zone, i.e. the length of the shortest straight horizontal line that can be drawn between the 0.125 dptr loop in the left peripheral zone and the 0.125 dptr loop in the right peripheral zone. The horizontal direction can be determined based on the engraving on the surface or in the thickness of the progressive spectacle lens. In these zones of small refraction, the average refractive power does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters. In addition, areas of small medium refraction occupy at least 40%, preferably at least 45% of an ophthalmic eyeglass lens. If the ophthalmic eyeglass lens is a round ophthalmic eyeglass lens prior to polishing, which has a diameter of at least 40 mm, the areas of small medium refraction occupy at least 40% of the area of the eyeglass lens lying within a diameter of 40 mm around the geometric center of the eyeglass lens . In the context of the present description, the expression area of a spectacle lens means the area on one of the front and rear surfaces of the spectacle lens.

Preferably, the areas of small medium refraction in the left peripheral zone and in the right peripheral zone occupy at least 10%, preferably at least 15%, even more preferably at least 25% of the area of the spectacle lens.

Preferably, the average refractive power experienced by the carrier in the left peripheral zone and the right peripheral zone is always less than the second refractive power, in particular the second average refractive power.

The additional refraction provided by the second refractive power, in particular the second average refractive power, relative to the first refractive power, in particular the first average refractive power, of the eyeglass lens according to the present invention can be in the range from 1.0 to 3.0 diopters, and in particular in range from 1.5 to 2.5 diopters.

A progressive ophthalmic eyeglass lens according to one embodiment of the present invention comprises a front surface (i.e., a surface farthest from the eye) and a rear surface (i.e., a surface closest to the eye). The front and / or rear surfaces may be shaped to provide suitable contours of refractive power and astigmatism for the upper visual zone, lower visual zone, and corridor.

The front surface and the rear surface of the lens can be of any suitable shape. In one embodiment, the front surface is an arbitrary surface and the rear surface is spherical or toric. In another embodiment, the front surface is a spherical or toric surface, and the rear surface is an arbitrary shape surface.

In yet another embodiment, both the front and rear surfaces are surfaces of arbitrary shape. It should be understood that a surface of arbitrary shape may contain, for example, an atoric surface, a progressive surface, or combinations thereof.

The present invention overcomes the disadvantages mentioned in the premises of the present invention by modifying the amount of stable refraction in the additional zone and by manipulating the gradients of peripheral lateral refraction of this zone. It is assumed that these changes in the progressive eyeglass lens will stimulate additional accommodative effort and will prevent its weakening over time, since the presence of positive refraction in the lower zone of vision will be less obvious to the wearer due to the smaller spatial area covered by positive refraction. In addition, negative refraction gradients on both sides of the near field of vision should increase the accommodation effort if these peripheral accommodation stimuli are strong enough (Charman WN & Radhakrishnan H, Peripheral refraction and the development of refractive error: a review, Ophthalmic Physiol Opt 2010 30, 321-338).

Based on the assumption described above, an innovative progressive ophthalmic eyeglass lens was developed to provide a new and effective way to combat myopia. The ideal effect of this progressive lens would be that the lens does not change the child's accommodation response relative to the normal reaction that the eye with a monofocal lens (distance prescription) demonstrates during near vision tasks, but creates an image in front of or on the central fossa or at least minimizes the delay in accommodation in the central fossa. In contrast, in standard progressive complementary lenses (PALs), the carrier usually sees a large area of positive refraction at the bottom of the lens, which can lead to adaptation (decrease) of the accommodation reaction.

Thanks to the progressive spectacle lens of the present invention, the area of vision near the corresponding progressive complementary lens (PAL) for controlling myopia can be made narrower than usual and can be surrounded on the side by relatively low average refraction, according to

- 4 033949 good refraction for the distance of the lens. Thus, the near field of view can be made as narrow as practical, while the areas of attenuation of peripheral refraction on both sides of the near field of view can be made as wide as possible. This means that there are relatively steep gradients to the left and right of the near field of view. In contrast, the traditional PALs currently available on the market try to provide a fairly wide field of view near with a smooth distribution (gentle gradients) of additional average refraction at the bottom of the lens, minimizing the size and depth of the peripheral areas of refraction attenuation on both sides near vision areas.

In the progressive eyeglass lens according to the present invention, the areas of low-mid-range refraction in the left and right peripheral zones predominantly extend to a location below the horizontal line passing through the base point for near so as to substantially surround the lower visual zone on the left and right. As mentioned earlier, the horizontal direction can be determined based on the engravings available on the surface of the progressive spectacle lens. In particular, the zones of small medium refraction in the left and right peripheral zones, which extend at least to horizontal lines located 5 mm above and below the horizontal line passing through the base point for the near lens spectacle, are advantageous. Due to this measure, most of the lower visual zone on the side is surrounded by these zones of small refraction.

In the present invention, the zone of small average refraction in the upper visual zone can cover the entire area of the eyeglass lens (within the specified circle with a diameter of 40 mm around the geometric center of the eyeglass lens) lying above the horizontal line passing through the base point for the distance.

In some embodiments, implementation of the present invention, for example in an embodiment in which the second refractive power, in particular the second average refractive power, represents additional refraction up to 1.5 diopters (diopters) or less for the first refractive power, in particular the first average refractive power , the zone of small average refraction in the upper visual zone, the zone of small medium refraction in the left peripheral zone and the zone of small medium refraction in the right peripheral zone ovyvat continuous zone of low refraction. This measure provides an especially large zone of small refraction. In particular, such a large zone of low average refraction can occupy at least 50% and preferably at least 60% of the indicated area of the spectacle lens within a circle 40 mm in diameter around the geometric center of the spectacle lens.

In one embodiment of a progressive eyeglass lens, the second refractive power, in particular the second average refractive power, represents additional refraction in the range from 1.5 and up to 2.0 diopters. In this embodiment, the areas of small medium refraction in the left and right peripheral zones are separated from the zone of small medium refraction in the upper visual zone. Areas in which the average additional refraction by 0.125 diopters exceeds the refraction for the distance, but does not reach a level of 0.5 diopters higher than the refraction for the distance, connect the zone of small average refraction in the upper visual zone with each of the zones of small average refraction in the left and right peripheral zones. In this embodiment, the area of small medium refraction can occupy at least 45% of the indicated area of the spectacle lens within a circle 40 mm in diameter around the geometric center of the spectacle lens.

In another embodiment of a progressive spectacle lens, the second refractive power, in particular the second average refractive power, represents additional refraction in the range from 2.0 and up to 2.5 diopters and the zones of small medium refraction in the left and right peripheral zones are separated from the zone of small medium refraction in the upper visual zone. The area in which the average incremental value is more than 0.125 diopters higher than the refraction for the distance, but does not reach a level of 0.5 diopters higher than the refraction for the distance, connects the zone of small average refraction in the upper visual zone with at least one of the areas of small medium refraction in the left and right peripheral zones. In this embodiment, the area of small medium refraction can occupy at least 45% of the indicated area of the eyeglass lens, in particular within a circle 40 mm in diameter around the geometric center of the eyeglass lens, if the eyeglass lens is a round eyeglass lens with a diameter of at least 40 mm.

Preferably, the astigmatism of the surface of the progressive spectacle lens, in particular within a circle with a diameter of 40 mm around the geometric center of the spectacle lens, if the spectacle lens is a round spectacle lens with a diameter of at least 40 mm, does not exceed 5.5 diopters to maintain aberrations in the peripheral zone as low as possible. If the additional refraction is in the range of more than 1.5 and up to 2.0 diopters, surface astigmatism, in particular within a circle 40 mm in diameter around the geometric center of the eyeglass lens, if the eyeglass lens is a round eyeglass lens with a diameter of at least 40 mm, preferably not more than 4.5 diopters, and if the additional refraction is 1.5 diopters or less, surface astigmatism within a diameter of 40 mm is preferably not more than 3.5 diopters.

A method of manufacturing a progressive spectacle lens according to the present invention, which

- 5,033,949 is adapted for a particular carrier by means of a specific wearing position, comprising the steps of:

obtaining or providing a specific wearing position for a wearer, obtaining or providing a refractive ability for near vision of a wearer, obtaining or providing a refractive ability for near vision of a wearer, providing a lens blank based on a specific wearing position for a wearer, refraction for far vision and refraction for near vision the formation of at least one surface of arbitrary shape on the front surface and / or the back surface of the lens blank, which defines the upper a narrow visual zone with a base point for a distance that provides a first refractive power in a particular wearing position, in particular a first average refractive power, a lower visual zone with a base point for close proximity, which provides a second refractive power in a specific wearing position, in particular a second average refractive power, the corridor between the upper visual zone and the lower visual zone, the left peripheral zone and the right peripheral zone, which are separated by the corridor and the lower visual zone, with the surface of arbitrary shape is formed in such a way that zones of small medium refraction are present in the upper visual zone and at least one of the left peripheral zone and the right peripheral zone, while in the specific position of wearing the average refractive power experienced by the carrier does not exceed the sum of the first refractive ability, in particular the first average refractive power, and 0.125 diopters in these zones of low medium refraction, and at the same time the specified at least one surface of arbitrary shape form in such a way that zones of small medium refraction occupy at least 40% of the area of the progressive spectacle lens. Preferably, the average refractive power experienced by the carrier in the left peripheral zone and the right peripheral zone is always less than the second refractive power, in particular the second average refractive power. A spectacle lens that is manufactured using the method of the present invention may be a round spectacle lens before polishing, which has a diameter of at least 40 mm. In this case, the zones of small medium refraction occupy at least 40% of the area lying within the diameter of 40 mm. In particular, the zone of small average refraction in the upper visual zone can cover the entire area of the eyeglass lens within the specified diameter of 40 mm around the geometric center of the eyeglass lens, lying above a horizontal line passing through the base point for the distance. The formation of at least one arbitrary surface on the front surface and / or rear surface of the lens preform may include an optimization process during which the surface shape of the arbitrary shape of the lens preform is optimized. The optimization process is based on the target design of the lens, which determines the surface properties and / or optical properties that an optimized surface of arbitrary shape should demonstrate. In the optimization process, an arbitrary shape surface is optimized by minimizing differences between surface properties and / or optical properties that an arbitrary surface exhibits and surface properties and / or optical properties determined by the lens design. The target lens design is chosen so that the surface of any shape obtained as a result of the optimization process has a shape that leads to the fact that areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens.

A computer-implemented method for designing a progressive eyeglass lens that is adapted for a particular carrier by means of a specific wearing position, which includes the steps of:

obtaining or providing a specific wearing position for a carrier, obtaining or providing a refractive ability for near vision of a carrier, obtaining or providing a refractive ability for near vision of a carrier, based on a specific wearing position for a carrier, refractive ability for far vision and a refractive ability for near vision providing target a lens design that defines the optical properties that a progressive eyeglass lens should exhibit and surface optimization the arbitrary shape that should be formed on the lens blank, so as to minimize the difference between the optical properties that the surface of an arbitrary shape exhibits and the optical properties determined by the target lens design.

The target lens design is chosen in such a way that the optimization provides at least one optimized surface of arbitrary shape for the front surface and / or the back surface of the lens blank, and this at least one optimized surface of arbitrary shape defines the upper visual area with a base point for the distance providing in a particular wearing position, a first refractive power, in particular a first average refractive power, a lower visual area with a base point for near, about espechivayuschey in a specific position carrying second refractive power, a second middle in particular

- 6 033949 refractive power, the corridor between the upper visual zone and the lower visual zone, the left peripheral zone and the right peripheral zone, which are separated by the corridor and the lower visual zone. In addition, an optimized surface of arbitrary shape is formed in such a way that zones of small medium refraction are present in the upper visual zone and at least one of the left peripheral zone and the right peripheral zone, while in the specific wearing position the average refractive power experienced by the carrier does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones of low average refraction. In addition, the target lens design is chosen in such a way that after optimizing the specified at least one surface of arbitrary shape, the zones of small medium refraction occupy at least 40% of the area of the progressive spectacle lens.

In particular, the target lens design can be chosen in such a way that in at least one surface of an arbitrary shape provided through optimization, the distance between the zone of small medium refraction in the left peripheral zone and the zone of small medium refraction in the right peripheral zone does not exceed 25 mm and in some embodiments, the implementation does not exceed 20 mm.

Moreover, the target lens design can be chosen in such a way that in at least one surface of arbitrary shape provided through optimization, a zone of small medium refraction in the upper visual zone, a zone of small medium refraction in the left peripheral zone and a zone of small medium refraction in the right peripheral zone form a continuous zone of small refraction.

In particular, the target lens design can be selected in such a way that, in at least one surface of arbitrary shape provided through optimization, additional refraction provided by a second refractive power, in particular a second average refractive power, relative to the first refractive power, in particular the first average refractive power ability, is in the range from 1.0 to 3.0 diopters.

The target lens design can be chosen in such a way that in at least one surface of arbitrary shape provided through optimization, the areas of small medium refraction in the left and right peripheral zones extend to a location below the horizontal line passing through the base point for near. In particular, the target lens design can be chosen in such a way that in at least one surface of arbitrary shape provided through optimization, the areas of small medium refraction in the left and right peripheral zones extend at least to horizontal lines located 5 mm higher and below the horizontal line passing through the base point for near.

In the first embodiment of the described method for designing a progressive spectacle lens, the target lens design is selected in such a way that, in at least one surface of arbitrary shape provided through optimization, a zone of small average refraction in the upper visual zone, a zone of small medium refraction in the left peripheral zone, and a zone of small medium refraction in the right peripheral zone form a continuous zone of small refraction. In this case, the second refractive power, in particular the second average refractive power, may represent an additional refraction of 1.5 diopters or less for the first refractive power, in particular the first average refractive power. Moreover, the target lens design is chosen in such a way that in at least one surface of an arbitrary shape provided through optimization, a continuous zone of low average refraction occupies at least 50% of the indicated area of the spectacle lens lying within a diameter of 40 mm around the geometric center of a spectacle lens.

In a second embodiment of the method for designing a progressive spectacle lens according to the present invention, the target lens design is selected so that in at least one surface of arbitrary shape provided through optimization, the second refractive power, in particular the second average refractive power, represents additional refraction of more than 1, 5 and up to 2.0 diopters for the first refractive power, in particular, the first average refractive power, and the zone of low average refraction in the left and right the peripheral zones are separated from the zone of small average refraction in the upper visual zone, while the areas in which the average refractive power exceeds the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters, but does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.5 diopters, connect the zone of small average refraction in the upper visual zone with each of the zones of small medium refraction in the left and right peripheral zones.

In a third embodiment of the method for designing a progressive spectacle lens according to the present invention, the target lens design is selected so that in at least one surface of arbitrary shape provided by optimization, the second refractive power, in particular the second average refractive power, represents additional refraction from more than 2 , 0 and up to 2.5 diopters for the first refractive power, in particular, the first average refractive power, and the zone of small average refraction in the left and the right peripheral zones are separated from the zone of small medium refraction in the upper visual zone, while the region in which the average refractive power exceeds the sum of the first refractive power, in particular

- 7 033949 of the first average refractive power, and 0.125 diopters, but does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.5 diopters, connects the zone of low average refraction in the upper visual zone with at least one of the areas of small medium refraction in the left and right peripheral zones.

The target lens design can be chosen in such a way that in at least one surface of any shape provided through optimization, the surface astigmatism within the diameter of the lens of 40 mm does not exceed 5.5 diopters, the computer-implemented method may further include the steps of providing lens blanks and the formation of a progressive spectacle lens with an optimized surface of arbitrary shape from the lens blank.

The method according to the present invention provides the design and manufacture of a progressive eyeglass lens according to the present invention with the advantages mentioned above with respect to the progressive eyeglass lens according to the present invention. Therefore, with regard to the advantages of the method according to the present invention, they relate to the advantages mentioned with respect to the progressive spectacle lens according to the present invention.

In addition, the present invention provides yet another computer-implemented method for designing a progressive eyeglass lens, which is adapted for the wearer through a specific wearing position, said eyeglass lens having a front surface and a rear surface. This method includes the steps of:

obtaining or providing a specific wearing position for a wearer, obtaining or providing a first refractive power, in particular a first average refractive power, for viewing into the distance of the wearer, obtaining or providing a second refractive power, in particular a second average refractive power, for vision near a carrier, providing a target project a lens defining the distribution of the refractive power of a progressive spectacle lens including the first refractive power, in particular and a first average refractive power, for distance vision and a second refractive power, in particular a second average refractive power, for near vision, an upper visual area with a base point for a distance, providing a first refractive power, in particular a first average refractive power, adapted for far vision ;

a lower visual area with a base point for near, providing a second refractive power, in particular a second average refractive power adapted for near vision, while the second refractive power, in particular the second average refractive power, provides additional refraction relative to the first refractive power, in particular the first medium refractive power;

a corridor between the upper visual zone and the lower visual zone, in which the refractive power is gradually changed from the first refractive power, in particular the first average refractive power, to the second refractive power, in particular the second average refractive power;

the left peripheral zone and the right peripheral zone, which are separated by a corridor and a lower visual zone;

however, zones of small medium refraction are present in the upper visual zone, the left peripheral zone and the right peripheral zone, and the average refractive power experienced by the carrier in a particular wearing position does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones of low medium refraction; at the same time, areas of small medium refraction occupy at least 40% of the area of the eyeglass lens, optimizing the shape of at least one of the front surface or the back surface in a specific wearing position based on the target lens design.

According to another aspect of the present invention, there is provided a progressive eyeglass lens that comprises:

the upper visual zone with a base point for the distance, providing in a particular position of wearing the first refractive power, in particular the first average refractive power, adapted for distance vision;

a lower visual zone with a base point for near, providing a second refractive power in a particular wearing position, in particular a second average refractive power adapted for near vision, while the second refractive power, in particular the second average refractive power, represents additional refraction relative to the first refractive power , in particular, a first medium refractive power;

a corridor between the upper visual zone and the lower visual zone, in which the refractive power gradually changes from the first refractive power, in particular the first middle

- 8 033949 refractive power, to the second refractive power, in particular the second average refractive power, in the specific position of wearing;

the left peripheral zone and the right peripheral zone, which are separated by a corridor and a lower visual zone; and a zone of small average refraction in the upper visual zone, the left peripheral zone and the right peripheral zone, the average refractive power experienced by the carrier in a particular wearing position does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these areas of small medium refraction.

According to the present aspect of the invention, the zones of small medium refraction occupy at least 40% of the area of the spectacle lens, and the distance, in particular the horizontal distance, between the zone of small medium refraction in the left peripheral zone and the zone of small medium refraction in the right peripheral zone does not exceed 25 mm. A progressive eyeglass lens according to the present aspect of the invention may be a circular progressive eyeglass lens, which has a diameter of at least 40 mm. In this case, the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric center of the progressive spectacle lens.

In addition, according to this aspect of the present invention, there is provided a computer-implemented method for designing a circular progressive eyeglass lens that is adapted to a particular carrier by a specific wearing position. The method includes the steps of:

obtaining or providing a specific wearing position for a carrier, obtaining or providing a refractive ability for near vision of a carrier, obtaining or providing a refractive ability for near vision of a carrier, based on a particular wearing position for a carrier, refractive ability for far vision and a refractive ability for near vision providing target a lens design that defines the surface properties or optical properties that a progressive eyeglass lens should exhibit a, and optimization of the surface of an arbitrary shape, which should be formed on the lens blank, so as to minimize the difference between the properties of the surface of an arbitrary shape or the optical properties that an arbitrary surface demonstrates, and the surface properties or optical properties determined by the target project lenses respectively.

The target lens design is chosen in such a way that the optimization provides at least one optimized surface of arbitrary shape for the front surface and / or the back surface of the lens blank, and this at least one optimized surface of arbitrary shape defines the upper visual area with a base point for the distance providing in a particular wearing position, a first refractive power, in particular a first average refractive power, a lower visual area with a base point for near, about espechivayuschey in a specific position carrying second refractive power, in particular a second average refractive power, a corridor between the top and bottom of the visual area of the visual area and left and right peripheral area of the peripheral zone, which are separated by corridor and lower visual area. In addition, the target lens design is chosen in such a way that an optimized surface of arbitrary shape is formed in such a way that zones of small average refraction are present in the upper visual zone and at least one of the left peripheral zone and the right peripheral zone, while the average wearing position the refractive power experienced by the carrier does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones of low average refraction . In addition, the target lens design is chosen in such a way that after optimizing the at least one surface of arbitrary shape, the areas of small average refraction occupy at least 40% of the area of the progressive spectacle lens and that the distance, in particular the horizontal distance, between the area of small medium refraction in the left peripheral zone and the zone of small medium refraction in the right peripheral zone does not exceed 25 mm

According to the present aspect of the invention, the progressive eyeglass lens may be a circular progressive eyeglass lens that has a diameter of at least 40 mm. In this case, the target lens design is chosen in such a way that the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric center of the progressive spectacle lens.

In the innovative progressive eyeglass lens according to the present aspect of the invention, the area of view near the progressive accessory lens (PAL) element for combating myopia is narrower than usual and is surrounded on the side by a relatively small average refraction similar to that for the distance of the lens. Thus, the near field of view is as narrow as practical, while the areas of peripheral refraction attenuation on both sides of the near field of view are as wide as possible. This means that there are relatively steep gradients on the left and

- 9 033949 to the right of the near vision zone. In contrast, the traditional PALs currently available on the market try to provide a fairly wide field of view near with a smooth distribution (gentle gradients) of additional average refraction at the bottom of the lens, minimizing the size and depth of the peripheral areas of refraction attenuation on both sides near vision areas.

According to yet another aspect of the present invention, there is provided a progressive eyeglass lens which comprises an upper visual area with a base point for a distance providing a first refractive power in a particular wearing position, in particular a first average refractive power adapted for distant vision;

a lower visual zone with a base point for near, providing a second refractive power in a particular wearing position, in particular a second average refractive power adapted for near vision, while the second refractive power, in particular the second average refractive power, represents additional refraction relative to the first refractive power , in particular, a first medium refractive power;

a corridor between the upper visual zone and the lower visual zone, in which the refractive power gradually changes from the first refractive power, in particular the first average refractive power, to the second refractive power, in particular the second average refractive power, in a particular wearing position;

the left peripheral zone and the right peripheral zone, which are separated by a corridor and a lower visual zone; and a zone of small average refraction in the upper visual zone, the left peripheral zone and the right peripheral zone, the average refractive power experienced by the carrier in a particular wearing position does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these areas of small medium refraction.

According to the present aspect of the invention, the progressive eyeglass lens is a circular progressive eyeglass lens which has a diameter of at least 40 mm, and the areas of small medium refraction occupy at least 40% of the area of the progressive eyeglass lens lying within a diameter of 40 mm around a geometric the center of a progressive spectacle lens.

In addition, according to the present aspect of the invention, there is provided a computer-implemented method for designing a circular progressive eyeglass lens that is adapted to a particular carrier by a specific wearing position. The method includes the steps of:

obtaining or providing a specific wearing position for a carrier, obtaining or providing a refractive ability for near vision of a carrier, obtaining or providing a refractive ability for near vision of a carrier, based on a particular wearing position for a carrier, refractive ability for far vision and a refractive ability for near vision providing target a lens design that defines the surface properties or optical properties that a progressive eyeglass lens should exhibit a, and optimization of the surface of an arbitrary shape, which should be formed on the lens blank, so as to minimize the difference between the properties of the surface of an arbitrary shape or the optical properties that an arbitrary surface demonstrates, and the surface properties or optical properties determined by the target project lenses respectively.

The target lens design is chosen in such a way that the optimization provides at least one optimized surface of arbitrary shape for the front surface and / or the rear surface of the lens blank, and this at least one optimized surface of arbitrary shape defines the upper visual area with a base point for distance, providing in a particular wearing position, the refractive power, in particular the first average refractive power, the lower visual area with a base point for close proximity, provide which, in a particular wearing position, has a second refractive power, in particular a second average refractive power, a corridor between the upper visual zone and the lower visual zone, and the left peripheral zone and the right peripheral zone, which are separated by the corridor and the lower visual zone. In addition, the target lens design is chosen in such a way that an optimized surface of arbitrary shape is formed in such a way that zones of small average refraction are present in the upper visual zone and at least one of the left peripheral zone and the right peripheral zone, while the average wearing position the refractive power experienced by the carrier does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones of low average refraction . In addition, the target lens design is chosen in such a way that after optimizing the specified at least one surface of arbitrary shape, the zones of small medium refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric center of the circular progressive spectacle lenses.

- 10 033949

According to yet another aspect of the present invention, there is provided a progressive eyeglass lens which comprises an upper visual area with a base point for a distance providing a first refractive power in a particular wearing position, in particular a first average refractive power adapted for distant vision;

a lower visual zone with a base point for near, providing a second refractive power in a particular wearing position, in particular a second average refractive power adapted for near vision, while the second refractive power, in particular the second average refractive power, represents additional refraction relative to the first refractive power , in particular, a first medium refractive power;

a corridor between the upper visual zone and the lower visual zone, in which the refractive power gradually changes from the first refractive power, in particular the first average refractive power, to the second refractive power, in particular the second average refractive power, in a particular wearing position; and a left peripheral zone and a right peripheral zone, which are separated by a corridor and a lower visual zone; and a zone of small average refraction in the upper visual zone, the left peripheral zone and the right peripheral zone, the average refractive power experienced by the carrier in a particular wearing position does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these areas of small medium refraction.

According to the present aspect of the invention, the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens and the areas of small medium refraction in the left peripheral zones and in the right peripheral zone occupy at least 10%, preferably at least 15%, even more preferably at least 25% of the area of the progressive spectacle lens. A progressive eyeglass lens according to the present aspect of the invention may be a circular progressive eyeglass lens, which has a diameter of at least 40 mm. In this case, the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric center of the progressive spectacle lens.

In addition, according to the present aspect of the invention, there is provided a computer-implemented method for designing a circular progressive eyeglass lens that is adapted to a particular carrier by a specific wearing position. The method includes the steps of:

obtaining, or providing, or calculating a specific wearing position for a carrier, obtaining or providing a refractive ability for near vision of a carrier, obtaining or providing a refractive ability for near vision of a carrier, based on a specific wearing position for a carrier, refractive ability for far vision and refractive ability for near vision, providing a targeted lens design that defines surface properties or optical properties that should show progress a clear eyeglass lens, and optimizing an arbitrary-shaped surface to be formed on the lens blank so as to minimize the difference between the properties of an arbitrary-shaped surface surface or the optical properties that an arbitrary-shaped surface exhibits and the surface properties or optical properties defined target lens design accordingly.

The target lens design is chosen in such a way that the optimization provides at least one optimized surface of arbitrary shape for the front surface and / or the back surface of the lens blank, and this at least one optimized surface of arbitrary shape defines the upper visual area with a base point for the distance providing in a particular wearing position, a first refractive power, in particular a first average refractive power, a lower visual area with a base point for near, about espechivayuschey in a specific position carrying second refractive power, in particular the first average refractive power, a corridor between the top and bottom of the visual area of the visual area, the left and right peripheral area of the peripheral zone, which are separated by corridor and lower visual area. In addition, an optimized surface of arbitrary shape is formed in such a way that zones of small medium refraction are present in the upper visual zone and at least one of the left peripheral zone and the right peripheral zone, while in the specific wearing position the average refractive power experienced by the carrier does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones of low average refraction. In addition, the target lens design is chosen in such a way that after optimizing the specified at least one surface of arbitrary shape, the areas of small average refraction occupy at least 40% of the area of the progressive spectacle lens and the area of small medium refraction in the left peripheral zones and in at least 10%, preferably at least 15%, even more preferably at least at least 10% of the right peripheral zone

25% of the area of the progressive spectacle lens.

According to the present aspect of the invention, there may be a round progressive eyeglass lens that has a diameter of at least 40 mm. In this case, the target lens design is chosen in such a way that the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric center of the progressive spectacle lens.

According to yet another aspect of the present invention, there is provided a progressive eyeglass lens which comprises an upper visual area with a base point for a distance providing a first refractive power in a particular wearing position, in particular a first average refractive power adapted for distant vision;

a lower visual zone with a base point for near, providing a second refractive power in a particular wearing position, in particular a second average refractive power adapted for near vision, while the second refractive power, in particular the second average refractive power, represents additional refraction relative to the first refractive power , in particular, a first medium refractive power;

a corridor between the upper visual zone and the lower visual zone, in which the refractive power gradually changes from the first refractive power, in particular the first average refractive power, to the second refractive power, in particular the second average refractive power, in a particular wearing position;

the left peripheral zone and the right peripheral zone, which are separated by a corridor and a lower visual zone;

zones of small medium refraction in the upper visual zone, the left peripheral zone and the right peripheral zone, the average refractive power experienced by the carrier in a particular wearing position does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones low medium refraction.

According to the present aspect of the invention, the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens and the areas of small medium refraction occupy such an area of the left peripheral zone and / or right peripheral zone that in a particular position of wearing, the reaction of accommodation of the carrier relative to the normal reaction, which demonstrates an eye with a monofocal lens according to the prescription for distance does not change during tasks related to near vision, but an image is created in front of the central fossa or s, or at least delay the accommodation on the fovea is minimized.

A progressive eyeglass lens according to the present aspect of the invention may be a circular progressive eyeglass lens, which has a diameter of at least 40 mm. In this case, the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric center of the progressive spectacle lens.

In addition, according to the present aspect of the invention, there is provided a computer-implemented method for designing a circular progressive eyeglass lens that is adapted to a particular carrier by a specific wearing position. The method includes the steps of:

obtaining, or providing, or calculating a specific wearing position for a carrier, obtaining or providing a refractive ability for near vision of a carrier, obtaining or providing a refractive ability for near vision of a carrier, based on a specific wearing position for a carrier, refractive ability for far vision and refractive ability for near vision providing a targeted lens design that defines surface properties or optical properties that should show progress a spectacle lens, and optimizing the surface of an arbitrary shape that should be formed on the lens blank so that the difference between the properties of the surface of an arbitrary shape or the optical properties that an arbitrary surface exhibits and the surface properties or optical properties defined target lens design accordingly.

The target lens design is chosen in such a way that the optimization provides at least one optimized surface of arbitrary shape for the front surface and / or the back surface of the lens blank, and this at least one optimized surface of arbitrary shape defines the upper visual area with a base point for the distance providing in a particular wearing position, a first refractive power, in particular a first average refractive power, a lower visual area with a base point for near, about espechivayuschey in a specific position carrying second refractive power, a second middle in particular

- 12 033949 refractive power, the corridor between the upper visual zone and the lower visual zone, the left peripheral zone and the right peripheral zone, which are separated by the corridor and the lower visual zone, while an optimized surface of arbitrary shape is formed in such a way that zones of small average refraction are present in the upper the visual zone and at least one of the left peripheral zone and the right peripheral zone, while in a particular wearing position, the average refractive power experienced by the carrier is not exceeds the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones of low average refraction. In addition, the target lens design is chosen in such a way that after optimizing the at least one surface of arbitrary shape, the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens, and the areas of small medium refraction occupy such an area of the left peripheral zone and / or the right peripheral zone, that in the specific position of wearing the reaction of accommodation of the carrier relative to the usual reaction, which shows the eye with a monofocal lens according to the prescription for distance, does not change in during tasks related to near vision, but an image is created in front of or on the central fossa, or at least accommodation delay in the central fossa is minimized.

According to the present aspect of the invention, there may be a round progressive eyeglass lens that has a diameter of at least 40 mm. In this case, the target lens design is chosen in such a way that the areas of small medium refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric center of the progressive spectacle lens.

The present invention further provides computer programs with program code for performing all steps of the method of computer-implemented methods for designing a progressive spectacle lens according to the present invention when a computer program is downloaded to or executed on a computer.

Although some additional improvements to the progressive eyeglass lens and a computer-implemented method for designing a progressive eyeglass lens have been described only with respect to some aspects of the present invention, one skilled in the art will recognize that the same additional improvements are described with respect to said some aspect of the present invention are also applicable to a progressive spectacle lens and a computer-implemented method for designing a progressive lens kovoy lenses according to other aspects of the present invention.

Additional features, properties, and advantages of the present invention will become apparent from the following detailed description of embodiments of the present invention in conjunction with the accompanying drawings.

In FIG. Figure 1 shows the contours of the average additional refraction tracked by the rays for a floating eye within a circle 40 mm in diameter around the geometric center of a progressive spectacle lens with additional refraction of approximately 1.5 diopters.

In FIG. 2 shows a contour image of surface astigmatism for the progressive spectacle lens of FIG. 1.

In FIG. 3 is a graph of a beam-tracked mean additional refraction for the progressive spectacle lens of FIG. 1 along the intended passage of the eye of FIG. 2.

In FIG. 4 shows a contour image of the average additional surface refraction for the progressive spectacle lens shown in FIG. 1.

In FIG. 5 shows graphs of average additional surface refraction for the progressive spectacle lens of FIG. 1 along several horizontal lines shown in FIG. 4.

In FIG. Figure 6 shows the contours of the average additional refraction tracked by the rays for a floating eye within a circle 40 mm in diameter around the geometric center of a progressive spectacle lens with additional refraction of approximately 2.0 diopters.

In FIG. 7 shows a contour image of surface astigmatism for the progressive spectacle lens of FIG. 6.

In FIG. 8 is a graph of a beam-tracked mean additional refraction for the progressive spectacle lens of FIG. 6 along the intended passage of the eye of FIG. 7.

In FIG. 9 shows a contour image of the average additional surface refraction for the progressive eyeglass lens shown in FIG. 6.

In FIG. 10 shows graphs of the average additional surface refraction for the progressive spectacle lens shown in FIG. 6 along several horizontal lines shown in FIG. 9.

In FIG. 11 shows the contours of the average additional refraction tracked by the rays for a floating eye within a circle 40 mm in diameter around the geometric center of a progressive spectacle lens with additional refraction of approximately 2.5 diopters.

In FIG. 12 shows a contour image of surface astigmatism for a progressive spectacle.

- 13 033949 of the lens shown in FIG. eleven.

In FIG. 13 is a graph of a beam-tracked mean additional refraction for the progressive spectacle lens of FIG. 11 along the path shown in FIG. 12.

In FIG. 14 shows a contour image of the average additional surface refraction for the progressive spectacle lens shown in FIG. eleven.

In FIG. 15 shows graphs of average additional surface refraction for the progressive spectacle lens of FIG. 11 along several horizontal lines shown in FIG. 14.

In FIG. Figure 16 shows the contours of the average additional refraction tracked by the rays for a floating eye within a circle 40 mm in diameter around the geometric center of a progressive spectacle lens with additional refraction of approximately 1.5 diopters, with the progressive surface located on the side of the lens facing the eye.

In FIG. 17 shows a contour image of astigmatism of the posterior surface for the progressive spectacle lens of FIG. 16.

In FIG. 18 is a graph of a beam-tracked mean additional refraction for the progressive spectacle lens of FIG. 16 along the intended passage of the eye of FIG. 17.

In FIG. 19 is a contour image of the average additional surface refraction on the back surface of the progressive spectacle lens of FIG. 16.

In FIG. 20 shows graphs of average additional surface refraction for the progressive spectacle lens of FIG. 16 along several horizontal lines shown in FIG. 19.

In FIG. 21 shows the contours of a beam-average mean additional refraction for a floating eye within a circle 40 mm in diameter around the geometric center of a progressive spectacle lens according to the prior art.

In FIG. 22 shows a contour image of surface astigmatism for a progressive spectacle lens of the prior art shown in FIG. 21.

In FIG. 23 is a graph of a beam-tracked average additional refraction of a surface for a progressive state-of-the-art spectacle lens of FIG. 21 along the assumed eye path shown in FIG. 22.

In FIG. 24 shows a contour image of the average additional surface refraction for a progressive spectacle lens of the prior art shown in FIG. 21.

In FIG. 25 shows graphs of the average additional surface refraction for a progressive spectacle lens of the prior art shown in FIG. 16 along several horizontal lines shown in FIG. 24.

Before referring to the description of embodiments of the present invention, the following will explain some of the expressions used throughout the following description.

The term surface of arbitrary shape means a surface that can be arbitrarily formed during the manufacturing process and which does not have to exhibit axial symmetry or rotational symmetry. In particular, a surface of arbitrary shape can lead to different forces on different parts of the surface. The use of surfaces of arbitrary shape can improve the quality of eyeglass lenses in terms of the quality of imaging experienced by the wearer, since the eyeglass lens can be optimized for individual parameters as prescribed for the wearer, as well as for individual data on alignment and frame. Arbitrary-shaped surfaces of progressive lenses have a larger number of parameters that can be taken into account when calculating surfaces than when calculating arbitrary-shaped surfaces for monofocal lenses, for example, the length of the progression corridor or additional refraction.

The term progressive eyeglass lens means an eyeglass lens with at least one progressive surface that provides an increase in average additional refraction from the upper visual zone for distance vision to the lower visual zone for near vision. In the context of the present invention, a progressive eyeglass lens may be an eyeglass lens before edge processing to fit under the eyeglass frame or after edge processing.

The term astigmatism of a surface means a reference to the extent to which the curvature of the lens varies between intersecting planes that are at right angles to the surface of the lens at a point on the surface. Astigmatism of the surface is equal to the difference between the minimum and maximum curvature of the lens surface in any of those intersecting planes, multiplied by (n-1), where n is the basic refractive index.

The term “crosshair fixation” means a mark located at a point on the surface of a progressive spectacle lens, which is set by the manufacturer as a base point for positioning the progressive spectacle lens in front of the wearer's eye. This means that the fixation crosshair is the mark of the fixation point on the lens surface, as provided by the manufacturer.

- 14 033949

The term refractive power refers to the effective error of refraction, calculated by tracking light rays, made for a floating eye looking at objects at an infinitely distant point, the lens being adapted to align the center of the pupil with the crosshair, and the center of rotation of the eye is 27 mm behind back peak point of the lens. This ability refers to a sphere that occurs at the center of rotation of the eye and touches the posterior vertex of the lens and is known as the base sphere. Refractive power is determined by calculating the vergence transmitted to the base sphere by the lens and subtracting the corresponding vergence required by the eye in order to see a clear image. This measures how well the lens meets the needs of the eye for focusing under the conditions of the selected eye model — the lens. The model includes modeling of rotation according to the Listing law for eye rotation and assumes that the lens has a typical pantoscopic angle of 7 ° at the crosshair and a coverage angle of 0 °. The refractive power of a lens, such as a progressive eyeglass lens, in a given position (this is usually the position on the base sphere centered on the center of rotation of the eye and touching the rear vertex of the lens) in ophthalmic optics is usually defined as a combination of three scalar values: spherical refraction, cylinder (astigmatism ) and the position of the axis of the cylinder. The average refractive power of the lens is equal to the sum of the spherical refraction and half the value of the cylinder, i.e.

M = S + C / 2, where M is the average refractive power, S is spherical refraction, and C is a cylinder or astigmatic refraction. In this context, a sphere is a refraction of a lens that brings the paraxial beam of parallel light rays into one focus, while the paraxial beam of parallel light rays is a beam of light rays at which the distance at which the light rays contained in the beam of light rays are located from the optical axis of the lens is small, and the angles at which light rays pass relative to the optical axis can be approximately determined in accordance with the ratio sina ~ α, and the cylinder means capable of The eyeglass lens can mutually align the paraxial beam of parallel light rays into two separate linear foci at right angles. In this context, the term prime meridian means one of two mutually perpendicular meridians of a cylindrical lens that are parallel to two focus lines, the term meridian means a plane that contains the center of curvature of the surface and the normal vector at the center of curvature. Cylindrical refraction is associated with astigmatic refraction, which means the difference in refraction values in the two main meridians. The direction of the main meridian, which is taken as the basis for cylindrical refraction, is called the position of the axis of the cylinder.

The term Dal point of reference (DRP) means a point on the surface of the upper half of a progressive spectacle lens, which uses the refractive power for distance vision.

The expression “upper visual zone” means a zone in the vicinity of the base point for the distance, which has a refractive power that corresponds to refraction for near vision or is close to it and has an astigmatic error for the carrier in a particular wearing position of less than 0.5 diopters.

The term “near proximity base point” (NRP) means a point on the surface of the lower half of a progressive spectacle lens that uses the refractive power for near vision.

The expression “lower visual zone” means a zone in the vicinity of the near point of reference, which has a refractive power that corresponds to refraction for near or close vision and has an astigmatic error for the carrier in a particular wearing position of less than 0.5 diopters.

The term corridor describes the region between the upper visual zone and the lower visual zone in which the refractive power gradually changes from the refractive power for distance to the refractive power for near and in which surface astigmatism is less than 0.5 diopters.

The term peripheral zone means zones that have an astigmatic error for the carrier in a particular wearing position of 0.5 diopters or more, and which are located to the left and right of the corridor and lower visual zone.

The term average additional refraction should mean the difference between the beam-tracking refractive power at a given location of the lens and the average refractive power at the base point for the distance.

The term additional surface refraction means the difference between the refraction of the surface of the lens in a given position and the refraction of the surface at the base point for the distance. If a scalar variant of additional surface refraction is used, this scalar variant is called average additional surface refraction, since surface refraction is generally a 2 ^ 2 tensor.

The expression passage of the eye means the geometric location of the points of visual fixation, which with the correct design of a progressive spectacle lens for the wearer, as a rule, coincides with the geometric location of the points of the horizontal midpoints between the nasal and temporal 0.5 diopters

- 15 033949 by the contours of astigmatism, when the carrier regulates fixation from a distant object, i.e. far field object, to a close object, i.e. near field object.

A first embodiment of a progressive eyeglass lens according to the present invention will now be described with reference to FIG. 1-5. The first embodiment is a progressive eyeglass lens with additional refraction of approximately 1.50 diopters.

In FIG. 1 shows the contours of the average additional refraction tracked by the rays for a floating eye inside a circular frame with a diameter of 40 mm of a progressive spectacle lens of the first embodiment, centered in the geometric center of the progressive spectacle lens. The figure shows, in addition to the fixation crosshair 1, a partial circle 2, the center of which is defined by the base point 2A for the distance, and a semicircle 3 with the base point 3A for near at its center. The contours shown in FIG. 1 represent lines on which the average additional refraction of a progressive spectacle lens is 0.25, 0.5, and 1.0 diopters, respectively. The dotted area in FIG. 1 represents a zone in which the average additional refraction does not exceed 0.125 diopters. This zone is hereinafter referred to as the zone of low medium refraction. Therefore, in the zone of low average refraction, the average refractive power, i.e. the sum of the refraction for the distance and the average additional refraction of the progressive spectacle lens does not exceed the sum of the refractive power for the distance and 0.125 diopters. It should be noted that in the zone of low average refraction, the average refractive power of a progressive spectacle lens can be even less than the refractive power for distance.

In FIG. 2 is a contour image showing astigmatism of the surface of the front surface of the progressive spectacle lens shown in FIG. 1. Surface astigmatism is indicated by contour lines representing steps of 0.5 diopters. As can be seen in FIG. 2, there are contour lines on the right side and the left side of the corridor representing surface astigmatism of 0.5 diopters, which delimit the left and right peripheral zones 4L, 4R. The maximum astigmatism values achieved in the left and right peripheral zones 4L, 4R are approximately 3.5 diopters.

The left and right peripheral zones 4L, 4R are separated by the lower visual zone 5 and the corridor 6 of the progressive spectacle lens. The area above 0.5 diopters of the surface astigmatism contour represents the upper visual zone 7 of the progressive spectacle lens.

In FIG. 2 also shows the prospective eye line 8 of the progressive spectacle lens. The distribution of the average complement of the front surface of the lens, tracked by the rays along the line of passage of the eye, is shown in the graph shown in FIG. 3. In this figure, the horizontal axis represents the vertical distance from the intersection of the eye line 8 with the horizontal line passing through the geometric center of the progressive eyeglass lens, which is located at y = 0, while the vertical axis represents refraction, which is added to the refractive power for gave a progressive spectacle lens in diopters (diopters). It should be noted that the value of 0 diopters of average additional refraction does not mean that the refractive power in this particular place is equal to zero, but means that the refractive power in this particular place corresponds to the refractive power for distance according to the prescription for the patient.

As can be seen in the graph shown in FIG. 3, the base DRP point for the distance is located at a distance of 8 mm from y = 0 mm in the direction of the upper end of the progressive spectacle lens, i.e. in the place to which y = -8 mm corresponds. The upper visual zone of the present embodiment begins at approximately y = 4 mm (position of the fixation crosshair). As can be further seen in the graph of FIG. 1, the average additional refraction tracked by the rays is less than 0.125 diopters up to the upper vertical end of the progressive spectacle lens.

The near point NRP for near is located at approximately y = -8 mm, and the lower visual zone begins at approximately y = -6.1 mm (position 95% of the nominal average additional refraction along the eye). The lower visual zone contains a plateau of a beam-tracked average additional refraction that extends from about y = -8 mm to about y = -20 mm and in which a beam-tracked average additional refraction is almost constant at 1.5 diopters. Therefore, the basic refraction for the near is approximately 1.5 diopters higher than the basic refraction for the distance.

Between approximately y = 4 mm and approximately y = -8 mm, the average additional refraction tracked by the rays increases sharply from about 0.125 diopters to about 1.5 diopters. The area in which the average additional refraction sharply increases corresponds to corridor 6.

In FIG. Figure 4 shows a contour image representing the average additional surface refraction using contour lines, increasing in increments of 0.5 diopters. In addition, in FIG. 4 shows horizontal lines 9A-9D intersecting a near field of view that extend perpendicular to the eye line 8.

In FIG. 5 is a graph showing additional surface refraction values along the horizontal lines 9A-9D shown in FIG. 4. In this graph, the horizontal axis represents the distance x from the vertical line passing through the geometric center of the progressive spectacle lens, and the vertical axis represents the average additional refraction in diopters

- 16 033949 (diopters). It should be noted that the line 8 of the eye is slanted due to convergence of the eyes when looking at close objects, and this line does not coincide with the zero value on the horizontal axis shown in FIG. 5, in the region of horizontal lines 9A-9D. In FIG. 5 you can see that the average additional refraction is the largest (1.5 diopters) on the line of passage of the eye and decreases in the direction of the left and right edges of the progressive spectacle lens to values less than 0.125 diopters at approximately x = -8 mm and approximately x = 12 mm. In the present embodiment, the distance between these points is 20 mm. It should be noted that in the direction of the corridor and in the direction of the lower edge of the progressive spectacle lens, the distance between the areas of small medium refraction in the left and right peripheral zones 4L, 4R becomes smaller (see Fig. 1), so that the distance of 20 mm is the maximum distance in the present embodiment.

In the present embodiment, the average additional surface refraction decreases further to a value that is less than the basic refraction for the distance, before it again increases so that it finally exceeds 0.125 diopters at approximately x = -16 mm and approximately x = 19 mm, respectively. The zones between approximately x = -8 mm and approximately x = -16 mm and between approximately 12 mm and approximately 19 mm on the other side are part of the small medium refraction zone shown in FIG. 1.

As it becomes clear from FIG. 1, the zone of small medium refraction of the present embodiment is continuous and includes almost the entire upper visual zone and large parts of the left and right peripheral zones. Moreover, the gradient with which the average additional refraction decreases from the lower visual zone 5 towards the left and right peripheral zones 4L, 4R is sharp compared to traditional progressive ophthalmic progressive eyeglass lenses, which will be described by way of example with reference to FIG. . 16-20.

As already mentioned, in the image shown in FIG. 1, a circle with a diameter of 40 mm is shown. The total area of this circle is 1256.65 mm ² . The area covered by the zone of low medium refraction is 758.9 mm ² , which corresponds to 60.4% of the total area of the circle. Thus, a large part of the progressive ophthalmic progressive eyeglass lens according to the first embodiment practically does not provide medium additional refraction.

A second embodiment of the present invention will now be described with reference to FIG. 610. The description of the second embodiment will focus on differences from the first embodiment in order to avoid repetition. Therefore, features of the second embodiment, which are substantially similar to those of the first embodiment, are denoted by the same reference signs as in the first embodiment, and will not be explained again. A second embodiment is a progressive eyeglass lens in which additional refraction in the near visual area is approximately 2.00 diopters instead of approximately 1.5 diopters.

In FIG. 6 shows a circular frame with a diameter of 40 mm of a progressive spectacle lens according to the second embodiment. This figure corresponds to FIG. 1 of the first embodiment. As in the first embodiment, the average additional refraction tracked by the rays within the region with dots can also be negative, i.e. the average refractive power available in the region of low refraction may be less than the refractive power for distance.

In FIG. 7, which corresponds to FIG. 2 of the first embodiment, a contour image representing surface astigmatism is shown. As can be seen in FIG. 7, the maximum astigmatism achieved in the progressive spectacle lens according to the second embodiment is approximately 4.5 in the right peripheral zone.

In FIG. 8, which corresponds to FIG. 3 for the first embodiment, a beam-tracked average additional refraction is shown along the eye line 8 of FIG. 7. The locations of the DRP base point for distance, NRP base point for near and corridor are the same as in the first embodiment. It should be noted that the average additional refraction tracked by the rays remains almost constant in the direction of the eye line 8 to the lower edge of the circle with a diameter of 50 mm shown in FIG. 7.

In FIG. 9, which corresponds to FIG. 4 of the first embodiment, a contour image is shown representing the average additional surface refraction in a progressive spectacle lens within a circle with a diameter of 50 mm of the progressive spectacle lens.

In FIG. 10, which corresponds to FIG. 5 of the first embodiment, an image is shown representing the average additional surface refraction along the four horizontal lines 9A-9D shown in FIG. 9. As can be seen in FIG. 10, the average additional surface refraction decreases in the -x direction as well as in the + x direction from 2.0 diopters at x = 2 mm (which corresponds to the place of the eye line) to 0.125 diopters. The value of 0.125 diopters is achieved at approximately x = -11 mm and approximately x = + 12 mm, respectively. Thus, the zones of low average refraction in the left and right peripheral areas are spaced about 23 mm apart. It should be noted that in the direction of the corridor, the distance between the zones of small average refraction in the left and right peripheral zones 4L, 4R becomes smaller, while the distance between the zones 11, 12 of small average refraction in the left and right peripheral zones 4L, 4R increases only slightly in the direction lower

- 17 033949 edges of the progressive spectacle lens (see Fig. 6). The distance between the zones of small medium refraction in the left and right peripheral zones 4L, 4R does not exceed approximately 25 mm. The gradient with which the average additional surface refraction decreases from the lower visual zone 5 towards the left and right peripheral zones 4L, 4R is slightly steeper than in the first embodiment.

In the second embodiment, the average additional surface refraction in the right peripheral zone 4R is further reduced to a value that is less than the basic refraction for the distance before it increases again and reaches the refractive power for the distance at approximately x = 22 mm. Thus, the width of the zone of small medium refraction along the horizontal lines 9A-9D in the right peripheral zone is more than 10 mm. In the left peripheral zone 4L, the average additional surface refraction does not fall below zero along the horizontal lines 9A-9D shown in FIG. 9, and reaches 0.125 diopters again at approximately x = -14 mm, so that the width of the zone of low average refraction is approximately 3 mm, which leads to a narrower zone of low average refraction than in the right peripheral zone 4R. This asymmetry is due to the fact that line 8 of the eye is displaced with respect to x = 0. However, in FIG. 6, it should be noted that the width of the zone of small medium refraction in the left peripheral zone 4L is the smallest in the horizontal line 9A-9D, so that a width of approximately 3 mm represents the minimum width of the zone of small medium refraction in the left peripheral zone.

As can also be seen in FIG. 6, the small medium refraction zone of the present embodiment is not continuous and contains three unconnected subzones 10, 11, 12, while the first subzone 10 more or less coincides with the upper visual zone 7, the second subzone 11 is located in the left peripheral zone 4L and the third subzone 12 is located in the right peripheral zone 4L. The first subzone 10 is connected to the second subzone 11 and the third subzone 12 of the progressive eyeglass lens sections, in which the average additional refraction tracked by the rays is from 0.125 to 0.5 diopters.

In the second embodiment, the area of the zone of small medium refraction within the circle with a diameter of 40 mm shown in FIG. 6 is 589.4 mm ² . Thus, the zone of low average refraction of the second embodiment occupies 46.9% of the area within the circle 40 mm in diameter shown in FIG. 6.

A third embodiment of the progressive eyeglass lens according to the present invention will now be described with reference to FIG. 11-15. Again, those elements that do not substantially differ from the elements shown in the first embodiment will be denoted by the same reference signs as in the first embodiment, and will not be explained again to avoid repetition. A third embodiment is a progressive eyeglass lens with additional refraction of approximately 2.50 diopters.

In FIG. 11 shows a circular frame with a diameter of 40 mm of a progressive spectacle lens according to the third embodiment. This figure corresponds to FIG. 1 of the first embodiment. The dotted area is a zone of small medium refraction of the third embodiment.

In FIG. 12, which corresponds to FIG. 2 of a first embodiment, a contour image of surface astigmatism of a progressive spectacle lens according to a third embodiment of the present invention is shown. The maximum magnitude of astigmatism achieved in a progressive spectacle lens is approximately 5.5 in the right peripheral region of 4R.

In FIG. 13, which corresponds to FIG. 3 of the first embodiment, a graph of the average additional refraction of the surface tracked along the rays along the eye line 8 is shown. The locations of the DRP base point for the distance, the NRP base point for near and the corridor are the same as in the first embodiment.

In FIG. 14, which corresponds to FIG. 4 of the first embodiment, a contour image is shown representing the average additional surface refraction within a circle with a diameter of 50 mm, and in FIG. 15, which corresponds to FIG. 5 of the first embodiment, the average additional surface refraction is shown along the horizontal lines 9A-9D in FIG. 14. From the maximum average additional surface refraction, the average additional surface refraction decreases in the left and right directions until the average additional surface refraction reaches 0.125 diopters. It should be noted that on the left side, i.e. in the x direction, the graph shows the average additional surface refraction that exceeds 0.125 diopters for three of the four lines 9A-9D. This is due to the fact that the zone 11 of small medium refraction in the left peripheral zone 4L contains two separate parts 1A, 11B, which are separated by a section of the left peripheral zone 4L, in which the average additional surface refraction exceeds 0.125 diopters and reaches approximately 0.25 diopters. Three of the four vertical lines 9A-9D pass through the zone between the two parts of the zone 11 of small medium refraction in the left peripheral zone 4L.

A value of 0.125 diopters is achieved at approximately x = −11 mm and approximately x = + 12 mm, respectively. Consequently, the zones of small medium refraction in the left and right peripheral areas are spaced about 23 mm apart. The gradient with which the average additional surface refraction decreases from the lower visual zone 5 towards the left and right peripheral zones 4L, 4R is even steeper than in the second embodiment.

- 18 033949

The distance between the zone of small medium refraction in the left peripheral zone 4L and the zone of small medium refraction in the right peripheral zone 4R is approximately 23 mm. It should be noted that in the direction of the corridor, the distance between the zones of small medium refraction in the left and right peripheral zones 4L, 4R becomes smaller and the distance between the zones of small medium refraction in the left and right peripheral zones 4L, 4R increases only slightly towards the lower edge of the progressive spectacle lens . The distance between the zones of small medium refraction in the left and right peripheral zones 4L, 4R does not exceed approximately 25 mm.

As can be seen in FIG. 11, zones 10, 11A, 11B, 12 of a small mean refraction in the upper visual zone 7, the left peripheral zone 4L and the right peripheral zone 4R are unrelated, as in the second embodiment. Moreover, the zone of small medium refraction in the left peripheral zone is formed by two unconnected parts 11A, 11B. However, the average additional surface refraction does not exceed 0.25 diopters between these two parts. Zones 11A, 11B of low middle refraction in the left peripheral zone 4L are connected to zone 10 of low medium refraction in the upper visual zone 7 by means of a progressive spectacle lens section in which the average additional surface refraction is from 0.125 to 0.5 diopters. Zone 12 of small medium refraction in the right peripheral zone 4R is connected to zone 10 of small medium refraction in the upper visual zone 7 by means of a progressive spectacle lens section in which the average additional surface refraction is from 0.125 to 1.0 diopters.

The area of a circle with a diameter of 40 mm shown in FIG. 11, which is occupied by the zone of small medium refraction, is 567.1 mm ² , which corresponds to a fraction of 45% of the total area within a circle with a diameter of 40 mm.

In the embodiments of the progressive eyeglass lens that have already been described, the refractive power at the base point for the distance is -2.5 diopters of a sphere (diopters of spherical refraction) and a surface of arbitrary shape that provides secondary additional refraction is located on the front surface of the progressive eyeglass lens, then as the back surface is spherical with a sphere of 2.4 diopters with a refractive index of 1.530, although the material of a progressive spectacle lens has a refractive index of leaving 1.594 (traditionally, the refraction of the surface of the lenses, in particular spherical lenses, is indicated in the base refractive index of 1.530, regardless of the lens material). However, a surface of arbitrary shape, providing medium additional refraction, can also be located on the back surface of the progressive spectacle lens, while the front surface is spherical. It should be noted that a toric rear surface (if an arbitrary surface is formed at the front) or a toric front surface (if an arbitrary surface is formed at the back) would also be possible. An additional option is to give an arbitrary shape to both the rear surface and the front surface so that the rear surface of the arbitrary shape and the front surface of the arbitrary shape together provide additional refraction of the lens.

Next, a fourth embodiment will be described with respect to FIG. 16-20. A fourth embodiment is a progressive eyeglass lens having a refractive index of 1.594, in which the refractive power at the base point for the distance is -2.5 diopters of the sphere (diopters of spherical refraction), and the average additional refraction in the visual area for near is approximately 1.5 diopters as in the first embodiment. The main difference between the first embodiment and the fourth embodiment is that the average additional refraction of the fourth embodiment is provided by a progressive rear surface of arbitrary shape, rather than a progressive front surface of arbitrary shape, as was the case in the first embodiment. The front surface of the fourth embodiment is a sphere of 2.4 diopters with a base refractive index of 1.530. The features of the fourth embodiment, which are essentially similar to those of the first embodiment, are denoted by the same reference signs as in the first embodiment, and will not be explained again.

In FIG. 16 shows a circular frame with a diameter of 40 mm of a progressive spectacle lens according to the second embodiment. This figure corresponds to FIG. 1 of the first embodiment. As in the first embodiment, the average additional refraction tracked by the rays within the region with the dots has an average refraction not exceeding the refraction for distance vision by more than 0.125 diopters.

In FIG. 17, which corresponds to FIG. 2 of a first embodiment, a contour image showing astigmatism of a surface of a rear surface is shown. As can be seen from a comparison of FIG. 17 and FIG. 2, astigmatism of the surface of the rear surface in the fourth embodiment is almost identical to astigmatism of the surface of the front surface in the first embodiment.

In FIG. 18, which corresponds to FIG. 3 for the first embodiment, a beam-tracked average additional refraction is shown along the eye line 8 shown

- 19 033949 in FIG. 17. The locations of the DRP base point for the distance, the NRP base point for near and the corridor are the same as in the first embodiment. In general, the characteristics of the average additional refraction tracked by the rays along the eye line are similar to the average additional refraction tracked along the eye line of the first embodiment.

In FIG. 19, which corresponds to FIG. 4 of the first embodiment, a contour image is shown representing the average additional refraction of the surface of the rear surface of the progressive spectacle lens according to the fourth embodiment, within a circle with a diameter of 50 mm of the progressive spectacle lens.

In FIG. 20, which corresponds to FIG. 5 of the first embodiment, a graph is shown representing the average additional refraction of the surface of the rear surface of the progressive spectacle lens along the four horizontal lines 9A-9D shown in FIG. 19.

The area of the zone of small medium refraction within the circle with a diameter of 40 mm shown in FIG. 16 is 764.4 mm ² in the fourth embodiment. Thus, the zone of low average refraction of the fourth embodiment occupies 60.8% of the area within the circle with a diameter of 40 mm shown in FIG. 16.

In comparison, a typical state-of-the-art progressive eyeglass lens having a refractive index of 1.594 with an average additional refraction of 1.5 diopters is shown in FIG. 21-25, which correspond to FIGS. 1-5 of the first embodiment, respectively.

As can be seen in FIG. 21, the beam-tracked average additional refraction in the peripheral zones always exceeds 0.125 diopters and in large areas of the peripheral zones it also exceeds 0.5 diopters, while in progressive spectacle lenses according to the first and fourth embodiments (which also have a beam-tracked average additional refraction 1.5 diopters) large sections of the peripheral zones do not exceed the average additional refraction tracked by the rays of 0.125 diopters (cf. FIGS. 1 and 16). The area of the zone of small medium refraction (areas with dots) within the circle with a diameter of 40 mm of a progressive spectacle lens of the prior art shown in FIG. 21 is 401.2 mm ² . Thus, the low-level medium refraction zone of a progressive spectacle lens of the prior art occupies only about 32% of the area within a circle with a diameter of 40 mm, while in the innovative progressive spectacle lens according to the first embodiment of the present invention, the low-average refraction zone occupies about 60% of the area within a circle with a diameter of 40 mm, which is almost twice as large as in a progressive spectacle lens of the prior art. Even in progressive eyeglass lenses according to the second and third embodiments, which have a greater beam-tracked average additional refraction than the progressive spectacle lens of the prior art shown in FIG. 21-25, a zone of small medium refraction with 45% occupies a significantly larger fraction of the area within a circle with a diameter of 40 mm than the zone of small medium refraction of a progressive spectacle lens of the prior art. In addition, a comparison of FIG. 5, 10, 15 and 20 of FIG. 25 shows that the gradient with which the average additional surface refraction changes from the lower visual zone towards the left and right peripheral zones is much steeper in the progressive spectacle lenses of the present invention than in the progressive spectacle lens of the prior art.

The present invention provides a progressive eyeglass lens, in which there is a large zone of low average refraction with ray-traced average additional refraction not exceeding 0.125 diopters, occupying at least 45% of the area within a circle 40 mm in diameter around the geometric center of the progressive eyeglass lens. In all depicted embodiments, the implementation of the zone of small medium refraction is present in the peripheral zones on both sides of the lower visual zone and the corridor. In contrast, the proportion of areas of small medium refraction in progressive spectacle lenses of the prior art does not exceed approximately 35% of the area within a circle with a diameter of 40 mm around the geometric center of the corresponding progressive spectacle lenses. Moreover, the progressive spectacle lenses of the prior art do not show areas of low medium refraction with a tracked average secondary refraction of less than 0.125 diopters in the peripheral zones or, if such zones of low medium refraction are present in the peripheral zones, they are present only in one of the right and left peripheral zones and they represent only a small fraction of the area of the corresponding peripheral zone.

According to one embodiment of the method for manufacturing a progressive eyeglass lens according to the present invention, a progressive eyeglass lens according to the present invention can be made individually for the wearer. The method includes the steps of obtaining a specific wearing position for the wearer, obtaining a first refractive power, in particular a first average refractive power, for viewing into the distance of the wearer, obtaining a second refractive power, in particular a second average refractive power, for viewing near the wearer and providing a semi-finished lens blank as lens blanks. In a semi-finished lens blank, one lens surface is already completed. This surface is typically a spherical or toric surface. In the present embodiment, the completed lens surface is a front surface. However, it can also be the back surface if

- 20 033949 an arbitrary surface should be formed on the front surface.

Based on the specific wearing position for the wearer, the first refractive power, in particular the first average refractive power, and the second refractive power, in particular the second average refractive power, an arbitrary shape surface is formed on the back surface of the semi-finished lens preform. This arbitrary-shaped surface defines the upper visual zone 7 with a base point 2A for distance, the lower visual zone 5 with a base point 3A for near and the corridor 6 between the upper visual zone 7, the lower visual zone 5, as well as the left peripheral zone 4L and the right peripheral zone 4R, which are separated by a corridor 6 and a lower visual zone 5. An arbitrary shape surface is formed so that zones 10, 11, 12 of small medium refraction are present in the upper visual zone 7 and at least one of the left peripheral zone 4L and the right riferiynoy 4R zone. In a specific wearing position, the average refractive power experienced by the wearer does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in the indicated zones 10, 11, 12 of low average refraction. Moreover, said at least one surface of arbitrary shape is formed in such a way that zones 10, 11, 12 of small medium refraction occupy at least 40% of the area of the progressive spectacle lens.

Although an arbitrary shape surface is formed on the rear surface of the semi-finished lens preform in the present embodiment of the method according to the present invention, an arbitrary shape surface can also be formed on the front surface. In this case, the back surface of the semi-finished lens blank would be spherical or toric.

It should be noted that the lens blank does not have to be a semi-finished lens blank, but can be any form of raw material suitable as a starting point for the formation of a spectacle lens.

A spectacle lens can be designed using a computer-implemented method. In this method, the specific wearing position for the wearer, the first refractive power, in particular the first medium refractive power, for the distance view of the wearer and the second refractive power, in particular the second medium refractive power, lenses are obtained or provided together with the target project for vision near the wearer. This target lens design determines the distribution of the refractive power of a progressive spectacle lens, including the first refractive power, in particular the first average refractive power, for distance vision and the second refractive power, in particular the second average refractive power, for near vision, the upper visual area 7 with a base point 2A for a distance providing a first refractive power, in particular a first average refractive power adapted for distance vision;

lower visual area 5 with a near base point 3A providing a second refractive power, in particular a second average refractive power adapted for near vision, while the second refractive power, in particular the second average refractive power, provides additional refraction relative to the first refractive power, particular first medium refractive power;

a corridor 6 between the upper visual zone 7 and the lower visual zone 5, in which the refractive power gradually changes from the first refractive power, in particular the first average refractive power, to the second refractive power, in particular the second average refractive power; and a left peripheral zone 4L and a right peripheral zone 4R, which are separated by a corridor and a lower visual zone 5;

wherein zones 10, 11, 12 of small medium refraction are present in the upper visual zone 7, the left peripheral zone 4L and the right peripheral zone 4R, and the average refractive power experienced by the carrier in a particular wearing position does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones 10, 11, 12 of small medium refraction. Zones 10, 11, 12 of small medium refraction occupy at least 40% of the area of the progressive spectacle lens.

The design of an eyeglass lens includes optimizing the shape of at least one of the front surface or the rear surface in a particular wearing position based on the target lens design. Information on how to optimize the surface shape of a spectacle lens can be found in EP 0857993 A2 or in Werner Koppen, Konzeption und Entwicklung von Gleitsichtglasern, DOZ 10/95, pp. 42-46.

Although the present invention has been described with respect to four embodiments for illustration, one skilled in the art will understand that embodiments are possible that differ from the presented embodiments. For example, the present embodiments demonstrate progressive spectacle lenses with a maximum average complementary

- 21 033949 refraction of approximately 1.5, 2.0 and 2.5 diopters. However, other values of the maximum mean additional refraction are also possible. Typical values of the maximum average additional refraction are in the range of 1.0-3.0 diopters, while the values of additional refraction from 1.5 to 2.5 diopters are the most common. Therefore, the present invention should not be limited to the specific embodiments described above, but only by the appended claims.

Positional designations:

- crosshair fixation;

- partial circle;

- a semicircle;

L, R - left, right peripheral zones;

- lower visual zone;

- corridor;

- upper visual zone;

- line of the eye;

A-D - horizontal lines;

- subzone;

- subzone;

- subzone.

Claims (26)

CLAIM 1. A progressive eyeglass lens containing an upper visual zone (7) with a base point (2A) for a distance that provides a first refractive power in a particular wearing position, in particular a first average refractive power adapted for distant vision; the lower visual area (5) with a base point (3A) for the near, providing a second refractive power in a particular wearing position, in particular a second average refractive power adapted for near vision, while the second refractive power, in particular the second average refractive power, represents additional refraction relative to the first refractive power, in particular the first average refractive power; the corridor (6) between the upper visual zone (7) and the lower visual zone (5), in which the refractive power, in particular the average refractive power, gradually changes from the first refractive power, in particular the first average refractive power, to the second refractive power, in particular the second medium refractive ability, ability in a particular position of wearing; and a left peripheral zone (4L) and a right peripheral zone (4R), which are separated by a corridor and a lower visual zone (5); and zones (10, 11, 12) of small average refraction in the upper visual zone (7), the left peripheral zone (4L) and the right peripheral zone (4R), and the average refractive power experienced by the carrier in a particular wearing position does not exceed the sum the first refractive power, in particular the first average refractive power, and 0.125 diopters in the indicated zones (10, 11, 12) of low average refraction; characterized in that the zones (10, 11, 12) of small medium refraction occupy at least 40% of the area of the progressive spectacle lens. 2. The progressive eyeglass lens according to claim 1, characterized in that said refractive power, in particular said average refractive power, in said specific wearing position for a wearer is determined by modeling a floating eye around its center of rotation, due to which the refractive power, in particular average refractive power, calculated by tracking light rays set for a floating eye looking at objects at an infinitely distant point, while progressive the fifth eyeglass lens is adapted to align the center of the pupil with the fixation point, and the center of rotation of the eye is located at a specific distance in the range of 20 to 30 mm behind the posterior vertex of the lens when the eye is in the main position, while the refractive power, in particular the specified average refractive power, refers to a sphere having a center at the center of rotation of the eye and touching the rear vertex point of the progressive spectacle lens, while modeling includes constructing a rotation model according to Listing A pivot eye and assumes that the lens has pantoscopic anger, selected from the range of -20 ° to + 30 °, at the point of fixation and the wrap angle selected from the range from -5 ° to + 15 °, at the point of fixation. 3. The progressive eyeglass lens according to claim 1 or 2, characterized in that the average refractive power experienced by the carrier in the left peripheral zone (4L) and right peripheral zone (4R) is always less than the second refractive power, in particular the second average refractive power. 4. A progressive eyeglass lens according to claims 1 to 3, characterized in that the progressive eyeglass lens is a round progressive eyeglass lens, which has a diameter of at least 40 mm, and zones (10, 11, 12) of small average refraction occupy at least at least 40% of the area of progressive - 22 033949 of a common lens lying within a diameter of 40 mm around the geometric center of a progressive spectacle lens. 5. A progressive eyeglass lens according to one of the preceding paragraphs, characterized in that the additional refraction provided by the second refractive power, in particular the second average refractive power, relative to the first refractive power, in particular the first average refractive power, is in the range from 1.0 to 3.0 diopters 6. A progressive eyeglass lens according to claim 1, characterized in that the distance between the zone (11) of small average refraction in the left peripheral zone (4L) and the zone (12) of small average refraction in the right peripheral zone (4R) does not exceed 25 mm. 7. A progressive eyeglass lens according to any one of the preceding paragraphs, characterized in that the zones (11, 12) of small average refraction in the left and right peripheral zones (4L, 4R) extend to a position below the horizontal line passing through the base point (3A ) for near. 8. A progressive eyeglass lens according to claim 7, characterized in that the zones (11, 12) of small average refraction in the left and right peripheral zones (4L, 4R) extend at least to horizontal lines located 5 mm higher and below the horizontal line through the base point (3A) for near. 9. A progressive eyeglass lens according to claim 4, characterized in that the area (10) of small average refraction in the upper visual zone (7) covers the entire area of the progressive eyeglass lens within a diameter of 40 mm around the geometric center of the progressive eyeglass lens above the horizontal line through the base point (2A) for the distance. 10. A progressive eyeglass lens according to any one of the preceding paragraphs, characterized in that the area (10) of low average refraction in the upper visual zone (7), the zone (11) of small average refraction in the left peripheral zone (4L) and the zone (12) of small medium refraction in the right peripheral zone (4R) form a continuous zone of small refraction. 11. The progressive eyeglass lens of claim 10, wherein the second refractive power, in particular the second average refractive power, is additional refraction of 1.5 diopters or less for the first refractive power, in particular the first average refractive power. 12. A progressive eyeglass lens according to claims 2 and 10 or claims 2 and 11, characterized in that the continuous zone (10, 11, 12) of small average refraction occupies at least 50% of the indicated area of the progressive eyeglass lens lying within the diameter 40 mm around the geometric center of a progressive spectacle lens. 13. A progressive eyeglass lens according to any one of claims 1 to 8, characterized in that the second refractive power, in particular the second average refractive power, represents additional refraction of more than 1.5 and up to 2.0 diopters for the first refractive the abilities, in particular of the first average refractive power, and the zone (11, 12) of low average refraction in the left and right peripheral zones (4L, 4R) are separated from the zone (10) of low average refraction in the upper visual zone (7), in which the average refractive power превышает exceeds the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters, but does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.5 diopters, connect the zone of (10) low average refraction in the upper visual zone (7) with each of the zones (11, 12) of small average refraction in the left and right peripheral zones (4L, 4R). 14. A progressive eyeglass lens according to any one of claims 1 to 8, characterized in that the second refractive power, in particular the second average refractive power, represents additional refraction of more than 2.0 and up to 2.5 diopters for the first refractive power, in particular, the first average refractive power, and the zone (11, 12) of small average refraction in the left and right peripheral zones are separated from the zone (10) of small average refraction in the upper visual zone (7), and the region in which the average refractive index ability pr It increases the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters, but does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.5 diopters, connects the area (10) of small average refraction in the upper visual zone (7) with at least one of the zones (11, 12) of small average refraction in the left and right peripheral zones (4L, 4R). 15. The progressive eyeglass lens according to claim 4, characterized in that the astigmatism of the surface within the diameter of the lens equal to 40 mm does not exceed 5.5 diopters. 16. A progressive eyeglass lens according to claims 15 and 11 or 12, characterized in that the surface astigmatism within the lens diameter of 40 mm does not exceed 3.5 diopters. 17. A progressive eyeglass lens according to claims 15 and 13, characterized in that the surface astigmatism within the lens diameter of 40 mm does not exceed 4.5 diopters. 18. A method of manufacturing a progressive spectacle lens, which is adapted for a particular carrier by means of a specific wearing position, comprising the steps of: obtaining or providing a specific wearing position for the wearer, - 23,033,949 obtaining or providing refractive power for vision into the distance of the wearer, obtaining or providing refractive power for vision in the vicinity of the wearer, providing a lens blank based on the specific wearing position for the wearer, refractive power for far vision and refractive power for near vision forming at least one surface of arbitrary shape on the front surface and / or the back surface of the lens blank, which defines the upper visual zone (7) from the base point d (2A) for a distance that provides the first refractive power in a particular wearing position, in particular, a first average refractive power adapted for distant vision, a lower visual area (5) with a base point (3A) for the proximity, providing a second refractive power in a specific wearing position the ability, in particular the second average refractive power, adapted for near vision, the corridor (6) between the upper visual zone (7) and the lower visual zone (5), the left peripheral zone (4L) and the right peripheral zone (4R), which they are separated by a corridor (6) and a lower visual zone (5), and an arbitrary surface is formed in such a way that zones (10, 11, 12) of small average refraction are present in the upper visual zone (7) and at least one of the left peripheral zone (4L) and right peripheral zone (4R), moreover, in a specific wearing position, the average refractive power experienced by the carrier does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in these zones (10, 11, 12) low average ref action and wherein said at least one surface of an arbitrary shape is formed such that the zones (10, 11, 12) of small average refractive occupy at least 40% of the progressive spectacle lens. 19. A computer-implemented method for designing a progressive spectacle lens that is adapted for a particular carrier by means of a specific wearing position, comprising the steps of: obtaining or providing a specific wearing position for a carrier, obtaining or providing a refractive ability for near vision of a carrier, obtaining or providing a refractive ability for near vision of a carrier, based on a particular wearing position for a carrier, refractive ability for far vision and a refractive ability for near vision providing target a lens design that defines the surface properties or optical properties that a progressive eyeglass lens should exhibit a, and optimization of the surface of an arbitrary shape, which must be formed on the lens blank in such a way as to minimize the difference between the properties of the surface of an arbitrary shape or the optical properties that an arbitrary surface demonstrates, and the surface properties or optical properties determined by the target lens design, respectively and the target lens design is chosen in such a way that optimization provides at least one optimized surface for arbitrary shape for the front surface and / or rear surface of the lens preform, and this at least one optimized surface of arbitrary shape defines the upper visual zone (7) with a base point (2A) for the distance, providing the first refractive power in a particular wearing position, in particular the first average refractive power, adapted for distant vision, the lower visual zone (5) with a base point (3A) for the near, providing a second refractive power in a particular wearing position, in particular there is a second average refractive power, adapted for near vision, the corridor (6) between the upper visual zone (7) and the lower visual zone (5), the left peripheral zone (4L) and the right peripheral zone (4R), which are separated by the corridor (6) and the lower visual zone (5), while an optimized surface of arbitrary shape is formed in such a way that zones (10, 11, 12) of small average refraction are present in the upper visual zone (7) and at least one of the left peripheral zone (4L) and the right peripheral zone (4R), while in a particular wearing position, the average refractive power experienced by the wearer does not exceed the sum of the first refractive power, in particular the first average refractive power, and 0.125 diopters in the indicated zones (10, 11, 12) of low average refraction, and the target lens design is chosen in such a way that after optimizing the indicated at least one surface of arbitrary shape, the zones (10, 11, 12) of small average refraction occupy at least 40% of the area of the progressive spectacle lens. 20. A computer-implemented method according to claim 19, characterized in that the distance between the zone (11) of small average refraction in the left peripheral zone (4L) and the zone (12) of small average refraction in the right peripheral zone (4R) does not exceed 25 mm 21. A computer-implemented method according to claim 19, characterized in that the progressive eyeglass lens is a round progressive eyeglass lens, and the target lens design is chosen so that after optimization of the specified at least one surface of an arbitrary shape of the zone (10 , 11, 12) of a small average refraction occupy at least 40% of the area of the progressive spectacle lens lying within a diameter of 40 mm around the geometric - 24 033949 center of a round progressive spectacle lens. 22. A progressive eyeglass lens according to any one of claims 1-17, characterized in that the zones (11, 12) of low average refraction in the left peripheral zones (4L) and in the right peripheral zone (4R) occupy at least 10% of the progressive area spectacle lenses. 23. A computer-implemented method for designing a progressive eyeglass lens according to claim 19, characterized in that the target lens design is chosen in such a way that after optimizing the indicated at least one surface of an arbitrary shape of the zone (11, 12) of small average refraction in the left peripheral zones (4L) and in the right peripheral zone (4R) occupy at least 10% of the area of the progressive spectacle lens. 24. The progressive eyeglass lens according to claim 1, characterized in that the zones (10, 11, 12) of small average refraction occupy such an area of the left peripheral zone (4L) and / or the right peripheral zone (4R) that in a specific position of wearing, the reaction accommodation of the carrier relative to the usual reaction that the eye with a monofocal lens demonstrates as prescribed for distance does not change during tasks related to near vision, but an image is created in front of or on the central fossa, or at least the accommodation delay in the central fossa is reduced I am to a minimum. 25. A computer-aided method for designing a progressive spectacle lens according to claim 19, characterized in that the target lens design is chosen in such a way that, after optimizing the specified at least one surface of an arbitrary shape, the zones (10, 11, 12) of small average refraction such an area of the left peripheral zone (4L) and / or the right peripheral zone (4R) that in a specific position of wearing the reaction of accommodation of the carrier relative to the usual reaction, which is shown by an eye with a monofocal lens according to the prescription for yes and does not change during the problems connected with near vision, but the generated image to the central fossa or on, or at least delay the accommodation on the fovea is minimized. 26. Implemented using a computer method according A.25, characterized in that it further includes the steps of providing a lens blank and forming a progressive spectacle lens with an optimized surface of arbitrary shape from the lens blank.