WO2025037573A1 - 眼鏡レンズ及び眼鏡 - Google Patents
眼鏡レンズ及び眼鏡 Download PDFInfo
- Publication number
- WO2025037573A1 WO2025037573A1 PCT/JP2024/028366 JP2024028366W WO2025037573A1 WO 2025037573 A1 WO2025037573 A1 WO 2025037573A1 JP 2024028366 W JP2024028366 W JP 2024028366W WO 2025037573 A1 WO2025037573 A1 WO 2025037573A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ring
- region
- refractive
- lens
- regions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
Definitions
- the present invention relates to eyeglass lenses and eyeglasses.
- Fresnel lenses are known as eyeglass lenses that suppress the progression of refractive errors such as myopia.
- Patent Document 1 relating to the Fresnel lens describes the following.
- Claim 1 of US Patent No. 5,999,333 describes a method for treating the progression of a refractive error in a human eye, comprising the steps of: (a) providing a Fresnel lens comprising a first optical zone having a first refractive power and a second optical zone having at least one second refractive power; and (b) correcting the refractive error using the first refractive power and generating at least one defocus using the second refractive power. Furthermore, it is stated in [0002] of Patent Document 1 that myopia and hyperopia are common refractive errors of the human eye.
- Patent document 2 describes a configuration in which the second refractive power area is made cylindrical in shape instead of a Fresnel lens.
- Spectacle lenses with configurations different from those described in Patent Documents 1 and 2 are also known.
- One such spectacle lens has island-like regions formed on the lens that have a more positive refractive power than the prescribed refractive power (see, for example, Patent Document 3).
- Spectacle lenses of the type described in Patent Document 3 etc. shown below are also called DIMS (Defocus Incorporated Multiple Segments) spectacle lenses, or DIMS for short.
- DIMS Defocus Incorporated Multiple Segments
- Claim 1 of Patent Document 3 describes the following: a first refractive zone having a first refractive power based on a prescription that corrects the refractive error of the eye; a second refractive region having a refractive power different from the first refractive power and having a function of focusing on a position other than the retina of the eye so as to suppress progression of refractive error of the eye; the second refractive region is formed as a number of independent island-like regions near the center of the lens,
- the present invention discloses a spectacle lens in which the first refractive region is formed in a region other than the region in which the second refractive region is formed.
- the spectacle lens is a myopia progression inhibiting lens.
- Patent document 4 describes that the plurality of at least three optical elements have an optical function of not focusing an image on the retina of the eye for standard wearing conditions and peripheral vision so as to slow the progression of abnormal refraction of the eye (Claim 1, Figures 14a, 14b, and 15)
- Patent document 5 paragraph [0102] describes how changing the convex portion of the substrate of a spectacle lens to a concave portion provides a function to reduce hyperopia.
- Patent document 6 shows a lens that inhibits the progression of myopia from the perspective of modulation transfer function (MTF). It also discloses that a periodic uneven structure suppresses contrast at specific spatial frequencies, thereby providing a myopia inhibition effect.
- MTF modulation transfer function
- the convex area of the spectacle lens When a parallel beam of light passes through a spectacle lens from a sufficiently distant location and enters the pupil, the convex area of the spectacle lens provides a refractive effect in accordance with its shape. On the other hand, when divergent light passes through a spectacle lens from close to the wearer of the spectacle lens and enters the pupil, the convex area of the spectacle lens provides only a low refractive effect.
- FIG. 1A is an explanatory diagram showing the state of a spherical wave (in the range of ⁇ 4, i.e., pupil diameter 4.0 mm, located behind the eyeball) when a parallel light beam from a sufficiently distant point passes through a myopia progression suppression lens and enters the pupil.
- FIG. 1B is an explanatory diagram showing the state of a spherical wave ( ⁇ 4, i.e., in the range of pupil diameter 4.0 mm, located behind the eyeball) when divergent light from near the wearer of the myopia progression inhibiting lens passes through the myopia progression inhibiting lens and enters the pupil.
- FIG. 1A a spherical wave corresponding to each minute convex portion (convex region in this specification) is generated.
- FIG. 1B the divergent light that has passed through each convex region enters the pupil from diagonally downward to diagonally upward. Therefore, compared to each spherical wave in FIG. 1A, one spherical wave is elongated in the vertical direction of the paper. The ratio of this elongation is approximately (1+L/T), where L [mm] is the corneal apex distance and T [mm] is the distance from the lens to the object during near vision.
- the spatial frequency at which contrast is suppressed is determined by the period of the structure. If the apparent period is elongated, the spatial frequency at which contrast is suppressed increases by the ratio of the elongation. For example, in a configuration in which the first and second refractive regions are spaced 2 mm apart in the meridional direction and 1 mm apart in the sagittal direction, contrast of a spatial frequency of 33 CPD is suppressed in the meridional direction and contrast of a spatial frequency of 66 CPD is suppressed in the sagittal direction for light from infinity with a wavelength of 530 nm, but the spatial frequencies suppressed by the above-mentioned elongation shift to 34.32 CPD and 68.64 CPD, respectively.
- This phenomenon also occurs because the refractive effect is determined by (incident height on the lens x refractive power), and when divergent light is incident, the incident height is relatively low on glasses that are in front of the pupil.
- the above problems can also occur with the DIMS.
- One possible solution to this problem is to irregularly arrange the numerous defocus areas in the DIMS. Unlike the Fresnel lens, the DIMS has numerous defocus areas, and it is possible to arrange each defocus area as desired to solve the above problem.
- the Fresnel lens described above originally has a ring-shaped configuration in a planar view.
- the Fresnel lens described in Figures 4a and 4b of Patent Document 1 has a rotationally symmetric shape with respect to a common center point for the alternating central optical zones 41 and 42.
- This rotationally symmetric shape is annular, i.e., rotationally symmetric, even when viewed relative to the surface on the eyeball side on which the ring-shaped configuration is formed (planar view), and is also rotationally symmetric in any cross-sectional view that is a cross section relative to the planar view and passes through the center point. Therefore, the difficulty of processing and measuring the Fresnel lens does not increase significantly.
- the Fresnel lens has a rotationally symmetric shape and can be easily machined on a lathe.
- it differs from the DIMS lens in which the second refractive region is formed as a number of independent island-like regions near the center of the lens.
- lathe processing is easy. The ease of lathe processing means that low-cost and high-precision processing is possible.
- lens measuring instruments usually also have a mode for scanning circumferentially in a planar view. Therefore, the difficulty of measuring a Fresnel lens, which has a rotationally symmetric shape, is not increased.
- DIMS Fresnel lens
- the inventors have discovered that the above problem can be solved by arranging at least a portion of the second refractive region in a ring on the object-side surface or the eyeball-side surface in planar view, providing a plurality of such rings, and shifting the position of the center of rotation between the ring closest to the center of the ring and the ring furthest from the center of the ring in planar view.
- the rings are arranged closely together on the nose side of the spectacle lens, where the line of sight passes, so that the rings can fully exert their refractive effect during near vision.
- the difficulty of processing and measuring the second refractive region is not so great compared to when the second refractive region is irregularly arranged, because the second refractive region is in the form of a ring.
- "at least a part of the second refractive region is arranged in a ring on the object side surface or the eyeball side surface” includes a case where circular segments ("second refractive regions" in this specification) are linked together to form a ring in a planar view as shown in FIG. 15 of Patent Document 4, a case where the second refractive regions are not connected to each other but are arranged in a ring, and a case where a mixture of linked and unconnected regions is included.
- a case where the second refractive regions are linked together to form a ring is mainly illustrated.
- this "arrangement in a ring” is also referred to as a "(second) ring-shaped region" for the sake of convenience of explanation, as it is considered to be a rough ring representation with the description of each of the second refractive regions omitted.
- the width of the ring-shaped region corresponds to the diameter of the segment ("second refractive region" in this specification) in a planar view (or the width of the segment in the radial direction of the eyeglass lens).
- the second ring-shaped region When the second refraction regions are connected in a daisy chain, the second ring-shaped region includes the second refraction regions and the first refraction regions that fill the gaps, as shown in FIG. 2A. When the second refraction regions are not connected in a daisy chain, the second ring-shaped region includes the second refraction regions and the first refraction regions that fill the gaps, as shown in FIG. 2B.
- ring-shaped region refers to a roughly circular region having a width.
- the center of the circle that passes through the middle of the width of the ring is defined as the “center of the ring.”
- the center of the circle formed by the inside of the ring and the center of the circle formed by the outside of the ring are both located in the same position as the center of the ring.
- the above problem applies not only when the spectacle lens is a myopia progression suppression lens and the second refractive region is a convex region, but also when the spectacle lens is a hyperopia reduction lens and the second refractive region is a concave region.
- One embodiment of the present invention aims to prevent an increase in the difficulty of processing and measuring lenses for myopia progression inhibition lenses or hyperopia reduction lenses while maintaining the comfort of wearing the lens, including preventing a decrease in the refractive effect of the second refractive region in near vision.
- the first aspect of the present invention is a method for producing a cellular membrane comprising the steps of: a first refractive zone having a first refractive power that provides a prescribed refractive power for the wearer; a second refractive region having a second refractive power different from the first refractive power, At least a part of the second refractive region and the plurality of second refractive regions are arranged in a ring shape on the object-side surface or the eyeball-side surface,
- the ring includes an inner ring and an outer ring surrounding the inner ring, When the eyeglass lens is viewed in a plan view, the position of the center of the inner ring is different from the position of the center of the outer ring,
- a spectacle lens that meets any of the following conditions: ⁇ Condition 1> The radial spacing between each ring is greater than the circumferential spacing between the second refractive regions within each ring. ⁇ Condition 2> The radial spacing between each ring is less than the circumferential spacing between the
- a second aspect of the present invention is a method for producing a composition comprising the steps of: In the eyeglass lens according to the first aspect, at least a portion of the ring is configured by a plurality of second refractive regions connected in a daisy chain.
- a third aspect of the present invention is a method for producing a composition comprising the steps of: A spectacle lens having an effect of inhibiting the progression of myopia, The spectacle lens according to the first or second aspect, wherein the second refractive region is a protrusion seen from the first refractive region.
- a fourth aspect of the present invention is a method for producing a composition comprising the steps of: A pair of glasses comprising the eyeglass lens according to the first or second aspect and an eyeglass frame.
- each second ring-shaped region protruding amount from the first ring-shaped region
- the protruding height of each second ring-shaped region is preferably about 0.1 to 10 ⁇ m, and more preferably about 0.4 to 2.0 ⁇ m.
- the proportion of the area of the surface on which the second ring-shaped region group is formed may be 20 to 60%.
- Each second refractive region (also referred to as a "segment" in this specification) is configured, for example, as follows:
- the diameter of the segment in a plan view is preferably about 0.6 to 2.0 mm.
- the surface area of each segment may be about 0.50 to 3.14 mm2 .
- the radius of curvature of the segment is 50 to 250 mm, preferably about 86 mm, and the segment is spherical.
- the minimum value of the defocus power provided by the defocus region on the eyeglass lens is within the range of 0.50 to 4.50 D, and the maximum value is within the range of 3.00 to 10.00 D.
- the difference between the maximum value and the minimum value is preferably within the range of 1.00 to 5.00 D.
- the "convex" in the description of the second refractive region may be read as “concave.”
- the values described in this section may be used with the positive and negative reversed as appropriate.
- the size of the center side clear region As a guideline for the lower limit of the size of the center side clear region, it is sufficient that the size is large enough to contain a circle with a diameter of 5.00 mm centered on the eye point EP. As a guideline for the upper limit of the size of the center side clear region, it is sufficient that the size is large enough to fit within a circle with a diameter of 10.00 mm centered on the eye point EP.
- the area of the center side clear region may be 80 mm2 or less.
- the shape of the center side clear region may be rotationally symmetric in a plan view, and may be, for example, circular.
- the requirement that the width of the nose side of each first ring-shaped region monotonically decreases outward may be satisfied.
- the two widths may be equal, or the more outer the first ring-shaped region is, the smaller the width of the nose side of the outer first ring-shaped region may be.
- a specific numerical range for each component is as follows: Width of the first annular region: 0.5-1.5 mm Width of the second ring region: 0.5-1.5 mm Ratio of the width of the second annular region to the width of the first annular region: 1:2 to 2:1
- the "ring width of the first annular region" is also the radial distance between the second annular regions.
- the above numerical range is a numerical range that satisfies the above condition 1 or condition 2.
- an example of the circumferential spacing between the second refractive regions in each second annular region may be 0 to 1.5 mm, and the value of (circumferential spacing between the second refractive regions in each second annular region)/(diameter of the second refractive region in each second annular region) may be 0 to 2.
- the following conditional expression may be satisfied: ((LD_k)/(LD_1)) 3/2 ⁇ W_k/W_1 ⁇ ((LD_k)/(LD_1)) 1/2
- the requirement that the width of the ear side of each first ring-shaped region increases monotonically outward may be satisfied.
- the two widths may be equal, or the more outer the first ring-shaped region is, the greater the width of the ear side of the outer first ring-shaped region may be.
- the width on the ear side of a first ring-shaped region (one if there is an odd number of first ring-shaped regions, and both if there is an even number of first ring-shaped regions) midway between the first ring-shaped region farthest from the eye point and the first ring-shaped region closest to the eye point may be greater than the width on the nose side.
- the increase in difficulty during processing and measurement can be suppressed while maintaining the wearing comfort, including suppressing the decrease in the refractive effect of the second refractive region in near vision.
- FIG. 1A is an explanatory diagram showing the state of a spherical wave when a parallel light beam from a sufficiently distant place passes through a myopia progression suppression lens and enters the pupil.
- FIG. 1B is an explanatory diagram showing the state of a spherical wave when divergent light from near a wearer of the myopia progression inhibiting lens passes through the myopia progression inhibiting lens and enters the pupil.
- FIG. 2A is a schematic plan view of a spectacle lens showing how, when the second refractive regions are connected in a daisy-chain, the second ring-shaped region includes the second refractive regions and the first refractive regions that fill the gaps.
- FIG. 1A is an explanatory diagram showing the state of a spherical wave when a parallel light beam from a sufficiently distant place passes through a myopia progression suppression lens and enters the pupil.
- FIG. 1B is an explanatory diagram showing the state of a spherical wave when divergent light from near a wear
- FIG. 2B is a schematic plan view of a spectacle lens showing how, when the second refractive regions are not connected in a daisy-chain, the second ring-shaped region includes the second refractive region and the first refractive region that fills the gap, as shown in FIG. 2B.
- FIG. 3 is a front view showing a spectacle lens according to one embodiment of the present invention, in which only the fourth second ring-shaped region counting from the inside is displaced to the left (nose side).
- 4 is a front view showing a spectacle lens according to another embodiment of the present invention, in which only the first, third, and fifth second ring-shaped regions, counting from the inside, are displaced to the left (nose side). Segments are omitted.
- FIG. 3 is a front view showing a spectacle lens according to one embodiment of the present invention, in which only the fourth second ring-shaped region counting from the inside is displaced to the left (nose side).
- 4 is a front view showing a spectacle lens according to another embodiment of the present invention, in
- FIG. 5 is a schematic explanatory diagram showing the segments of the second ring-shaped region in black in a front view showing the spectacle lens according to Comparative Example 1.
- FIG. 6 is a schematic explanatory diagram showing the front view of the eyeglass lens according to the first embodiment in which the segments of the second ring-shaped region are indicated in black, and the right-hand side view is a partially enlarged view of the left-hand side view.
- ⁇ refers to a value greater than or equal to a given value and less than or equal to a given value.
- the spectacle lenses mentioned in this specification have an object-side surface and an eye-side surface.
- the "object-side surface” is the surface that is located on the object side when spectacles equipped with the spectacle lens are worn by a wearer.
- the "eyeball-side surface” refers to the opposite, that is, the surface that is located on the eyeball side when spectacles equipped with the spectacle lens are worn by a wearer.
- the surface on the object side is convex and the surface on the eyeball side is concave, that is, the spectacle lens is a meniscus lens.
- the left-right direction in the direction facing the object side surface of the eyeglass lens (hereinafter, in plan view) is defined as the x-direction
- the up-down direction is defined as the y-direction
- the thickness direction of the eyeglass lens perpendicular to the x-direction and y-direction is defined as the z-direction.
- the z-direction is also the optical axis direction of the eyeglass lens.
- the origin is defined as the eye point. In this specification, a case where the eye point and the geometric center approximately coincide is illustrated.
- the right (3 o'clock direction) is the +x direction
- the left (9 o'clock direction) is the -x direction
- the top (0 o'clock direction) is the +y direction
- the bottom (6 o'clock direction) is the -y direction
- the direction toward the object side is the +z direction
- the opposite direction (toward the back) is the -z direction.
- the x direction is also called the x axis
- the y direction is also called the y axis
- the z direction is also called the z axis.
- the axis passing through the lens center from the object side toward the eyeball side is the z-axis
- the axis going from bottom to top and perpendicular to the z-axis is the y-axis
- the axis going from left to right and perpendicular to the z-axis is the x-axis.
- the -x direction of the left-eye lens is the nose side as seen by the third party, and the +x direction is the ear side.
- Figure 3 below relates to the left-eye lens.
- nose side refers to a specific direction (e.g., -x direction) from the eye point (origin) toward the area where x ⁇ 0 in the case of a left-eye lens. This rule takes into consideration the fact that the line of sight drops and moves toward the nose side (inward) during near vision.
- ear side refers to a predetermined direction (e.g., +x direction) from the eye point (origin) toward the area where x>0 in the case of a lens for the left eye.
- a predetermined direction from the eye point (origin) toward the region where x ⁇ 0 may be a predetermined direction from the eye point (origin) toward the region where x ⁇ 0 and y ⁇ 0 (preferably, y ⁇ 2x), taking into consideration that the line of sight drops during close vision.
- the magnitude relationships described in this paragraph can be reversed to define nasal and temporal.
- the "eye point (EP)" is the position through which the line of sight passes when the eyeglass lens is worn and the wearer looks straight ahead.
- the eye point is aligned with the prism reference point.
- the eye point is located halfway between two hidden marks.
- the eyepoint side of the eyeglass lens is called the inside, and the side of the outermost edge of the eyeglass lens is called the outside.
- expressions such as “closest to the eyepoint” are used, and the direction closer to the eyepoint (center of the lens) is called the inside, and the opposite direction away from the eyepoint (direction from the eyepoint toward the outer edge of the lens) is called the outside.
- the eyepoint coincides with the geometric center and centering center.
- the eyepoint may also be called the optical center or lens center.
- the prescription data of the wearer is written on the lens bag of the eyeglass lens.
- the lens bag of the eyeglass lens it is possible to identify the eyeglass lens based on the prescription data of the wearer's information, including whether it is for the right eye or the left eye.
- eyeglass lenses usually come in a set with a lens bag. Therefore, eyeglass lenses that come with a lens bag also reflect the technical idea of the present invention, and the same applies to sets of lens bags and eyeglass lenses.
- the eyepoint position can also be determined by referring to the remark chart or centration chart issued by the lens manufacturer.
- equal includes cases where a reference value A (e.g. distance or coordinate value) is equal to a comparison target value B, and also includes cases where 0.8 ⁇ B/A ⁇ 1.2 (preferably 0.9 ⁇ B/A ⁇ 1.1, and more preferably 0.95 ⁇ B/A ⁇ 1.05).
- the position of the center of the inner ring is different from the position of the center of the outer ring
- the distance between the positions of the two centers is 0.01 mm or more (or 0.1 mm or more, 0.5 mm or more, 1 mm or more).
- FIG. 3 is a front view showing a spectacle lens according to one embodiment of the present invention, in which only the fourth second ring-shaped region counting from the inside is displaced to the left (nose side).
- FIG. 3 shows an example in which there are six second ring-shaped regions, each of the embodiments described below has eleven second ring-shaped regions.
- Reference numeral 1 indicates the eyeglass lens
- reference numeral 2 indicates the central clear area (described later)
- reference numeral 4 indicates the outer clear area (described later).
- Reference numeral EP indicates the eye point.
- Reference numeral 3a indicates the first annular area group (described later)
- reference numeral 3b indicates the second annular area group (described later). The numbers 1, 2, 3, etc.
- FIG. 3 illustrates a case in which the center of the second annular area 3b9, which is the farthest from the eye point EP, is equal to the eye point EP.
- the reference numerals will be omitted.
- the eyeglass lens comprises: a first refractive zone having a first refractive power that provides a prescribed refractive power for the wearer; a second refractive region having a second refractive power different from the first refractive power, At least a part of the second refractive region and the plurality of second refractive regions are arranged in a ring shape on the object-side surface or the eyeball-side surface,
- the ring includes an inner ring and an outer ring surrounding the inner ring, When the eyeglass lens is viewed in a plan view, the position of the center of the inner ring is different from the position of the center of the outer ring,
- a spectacle lens that meets any of the following conditions: ⁇ Condition 1> The radial spacing between each ring (each second annular region described below) is greater than the circumferential spacing between the second refractive regions within each ring (each second annular region described below).
- the above condition 1 when the above condition 1 is adopted, the above condition 1 is satisfied in every ring and in every second refractive region within that ring in a single spectacle lens.
- the above condition 2 when the above condition 2 is adopted, the above condition 2 is satisfied in every ring and in every second refractive region within that ring in a single spectacle lens.
- the radial spacing when the above condition 1 is adopted, the radial spacing will be wider than the circumferential spacing on both the nose side and ear side as viewed from the eyepoint. Similarly, when the above condition 2 is adopted, the radial spacing will be narrower than the circumferential spacing on both the nose side and ear side as viewed from the eyepoint.
- At least a portion of the ring may be configured with a plurality of second refraction regions connected in a daisy chain.
- the entire ring may be configured with a plurality of second refraction regions connected in a daisy chain.
- the circumferential spacing between the second refraction regions within each ring is considered to be zero.
- a spectacle lens that has the effect of inhibiting the progression of myopia will be exemplified, and a case in which the second refractive region is a convex region will be exemplified.
- the second refractive region is a protrusion when viewed from the first refractive region
- the "convex" in the following description regarding the second refractive region can be read as "concave”.
- the values described in this section may be used with the positive and negative reversed as appropriate.
- the spectacle lens according to one aspect of the present invention adopts part of the concept of a Fresnel lens.
- the spectacle lens according to one aspect of the present invention includes a plurality of second annular regions that are annular regions constituted by the second refractive region when the spectacle lens is viewed in a plan view.
- the plurality of second annular regions are referred to as a second annular region group.
- the lens includes a plurality of first annular regions, each of which is sandwiched between the second annular regions and which is formed by the first refractive region.
- the plurality of first annular regions are referred to as a first annular region group.
- the first and second ring-shaped regions are alternately arranged adjacent to each other from the eye point outward.
- the second ring-shaped regions are densely arranged on the nose side outward from the eyepoint, while the second ring-shaped regions are sparsely arranged on the ear side outward from the eyepoint.
- the line of sight passes through the nose side of the spectacle lens.
- the second ring-shaped regions are densely arranged on the nose side of the spectacle lens so that they can fully exert their refractive effect.
- each ring i.e., between each second ring-shaped region
- the circumferential spacing between each segment within each ring is constant, so the wearing comfort can be maintained.
- it is a DIMS lens, it partially adopts a ring-shaped arrangement (a Fresnel lens concept), which reduces the difficulty of processing and measuring.
- the second ring-shaped region By arranging the second ring-shaped region densely on the nose side, the second ring-shaped region is naturally arranged sparsely on the ear side. This configuration can achieve another effect in addition to the effect of the present invention described above.
- the line of sight passes through the area where y>0 and x>0. Since the second ring-shaped area is densely arranged on the nose side, the second ring-shaped area is dense in the area where x ⁇ 0, but instead, the second ring-shaped area is sparse in the area where x>0.
- the fact that the second ring-shaped area is sparse means that the area occupied by the first ring-shaped area (the first refractive area with the prescribed refractive power) is larger on the ear side than on the nose side. In other words, when viewing far away and to the side, the state is closer to that of wearing normal eyeglass lenses.
- the second ring-shaped regions are arranged closer to the eyepoint and closer to the eyepoint, with the center positions being different from each other, so that the second ring-shaped regions are densely arranged on the nose side, moving outward from the eyepoint.
- the first refractive region is a portion having a smooth surface shape capable of realizing the wearer's prescribed refractive power from the viewpoint of geometrical optics, and is, for example, a portion that is transparent in the visible light wavelength range.
- the first refractive region corresponds to the first refractive region of Patent Document 3.
- the first refractive region of one aspect of the present invention functions as a so-called single-focus lens.
- the inside of the second annular region closest to the eyepoint is a central clear region which is the first refractive region, and the eyepoint is located within this central clear region.
- the central clear region and the first annular region group may be collectively referred to simply as a "clear region.”
- the outer clear region described below may also be collectively referred to as a clear region.
- the clear region is a region that causes a light beam incident from the object side surface to exit from the eyeball side surface, enter the wearer's pupil, and focus on the retina.
- the first refractive region of one aspect of the present invention can achieve a prescribed power (spherical power, cylindrical power, cylindrical axis, etc.).
- This spherical power may be a power to be corrected when looking straight ahead (distance to an object is from infinity to about 1 m) (for example, distance power; hereafter, distance power will be exemplified), or a power to be corrected when looking at intermediate distances (1 m to 40 cm) or near distances (40 cm to 10 cm).
- the center or upper part of the eyeglass lens is referred to as the distance portion
- the lower part of the eyeglass lens is referred to as the near portion.
- the lower part is the part through which the line of sight passes when viewing an object at a distance shorter than the distance defined by the first refractive region.
- the distance portion and near portion in this specification are a different concept from the distance portion and near portion used in progressive power lenses.
- the second refractive region corresponds to the alternating central optical region 42 described in Patent Document 1, and is an annular region having a second refractive power different from the first refractive power.
- the second refractive region is composed of a plurality of annular convex regions (second annular regions) that provide positive defocus power to allow the light beam incident from the object-side surface to exit from the eyeball-side surface, while allowing the light beam incident into the wearer's pupil to be focused in front of the light beam that has passed through the base region.
- the second refractive region may also be called a defocus region, or a region having a power different from the prescribed power, a so-called non-focusing region on the retina, or a region that does not focus the light beam incident into the wearer's pupil on the retina.
- the region other than the second refractive region is the first refractive region.
- a defocused region is a region in which, from a geometrical optical standpoint, at least a portion of the region does not focus light at the focusing position of the clear region.
- each second ring-shaped region protruding amount from the first ring-shaped region
- the protruding height of each second ring-shaped region is preferably about 0.1 to 10 ⁇ m, and more preferably about 0.4 to 2.0 ⁇ m.
- the proportion of the area of the surface on which the second ring-shaped region group is formed may be 20 to 60%.
- Each second refractive region (also referred to as a "segment" in this specification) is configured, for example, as follows:
- the diameter of the segment in a plan view is preferably about 0.6 to 2.0 mm.
- the surface area of each segment may be about 0.50 to 3.14 mm2 .
- the radius of curvature of the segment is 50 to 250 mm, preferably about 86 mm, and the segment is spherical.
- the segments may be composed of curved surfaces (either spherical or aspherical surfaces, or a combination of both), or may be composed of discontinuous surfaces other than curved surfaces.
- the central portion of the segment may be spherical, while the remaining peripheral portion is aspherically curved.
- the boundary between the central portion and peripheral portion is the point where the spherical shape changes to the aspherically curved shape.
- the boundary between the central portion and peripheral portion may be located at 1/3 to 2/3 of the radius in a plan view.
- the entire segment may be aspherically curved.
- the minimum value of the defocus power provided by the defocus region on the eyeglass lens is within the range of 0.50 to 4.50 D, and the maximum value is within the range of 3.00 to 10.00 D.
- the difference between the maximum value and the minimum value is preferably within the range of 1.00 to 5.00 D.
- Defocus power refers to the difference between the refractive power of each second ring-shaped region, which is a defocus region, and the refractive power of the portion other than each second ring-shaped region (clear region).
- defocus power is the difference obtained by subtracting the refractive power of the base portion from the average value of the minimum and maximum refractive powers at a given point in the defocus region.
- refractive power refers to the average refractive power, which is the average value between the refractive power in the direction in which the refractive power is minimum and the refractive power in the direction in which the refractive power is maximum (perpendicular to said direction).
- the size and shape of the central clear area There is no limitation on the size and shape of the central clear area.
- As a guideline for the lower limit of the size of the central clear area it is sufficient that the size is large enough to include a circle with a diameter of 5.00 mm centered on the eye point EP.
- As a guideline for the upper limit of the size of the central clear area it is sufficient that the size is within a circle with a diameter of 10.00 mm centered on the eye point EP.
- the area of the central clear area may be 80 mm2 or less.
- the shape of the central clear area may be rotationally symmetric in a plan view, for example, may be circular.
- the center position of the second ring-shaped region closest to the eye point is shifted toward the nose side relative to the center position of the second ring-shaped region farther from the eye point.
- the center position of each of the second ring-shaped regions constituting the second ring-shaped region group may be monotonically displaced toward the nose from the center position of the second ring-shaped region farthest from the eye point to the center position of the second ring-shaped region closest to the eye point.
- the term "monotonically displaced toward the nose” refers to, for example, that when the center position of any second ring-shaped region is compared with the center position of the second ring-shaped region immediately inside it, the centers are equal to each other or the center position of the inner second ring-shaped region is displaced toward the nose (specifically, in one direction toward the nose). Alternatively, the center positions may be excluded from being equal to each other.
- the definition that 60% or more of the number of all second annular regions and/or 60% or more of the total area of all second annular regions are monotonically displaced toward the nasal side may be used, preferably with values of 70%, 80%, or 90% instead of 60%.
- the amount of displacement (amount of displacement toward the nose side) from the center position of any second ring-shaped region to the center position of the nearest second ring-shaped region on the inside may be equal or may increase inward (i.e., monotonically increase). Alternatively, the amount of displacement toward the nose side may not be equal.
- the rule that 60% or more of the number of all second annular regions and/or 60% or more of the total area of all second annular regions satisfy the monotonically increasing rule described in this paragraph may be used instead, and it is preferred to use values such as 70%, 80%, or 90% instead of 60%.
- the center of the second annular region closest to the eyepoint may be located on the nasal side of the eyepoint.
- the requirement that the width of the nose side of each first annular region monotonically decreases toward the outside may be satisfied.
- the two widths may be equal, or the width of the nose side of the outer first annular region may decrease as the first annular region becomes more outer.
- the requirement that the two widths be equal may be excluded.
- the rule that 60% or more of the number of all first annular regions and/or 60% or more of the total area of all first annular regions satisfy the monotonically decreasing pattern described in this paragraph may be used instead, and it is preferred to use values such as 70%, 80%, or 90% instead of 60%.
- the temporal width is greater than the nasal width, and in each first annular region, the value of ⁇ (temporal width) - (nasal width) ⁇ may be equal or may increase (i.e., monotonically increase) outward from the eye point, or may exclude equality.
- the rule that 60% or more of the number of all first annular regions and/or 60% or more of the total area of all first annular regions satisfy the monotonically increasing rule described in this paragraph may be used instead, and it is preferred to use values such as 70%, 80%, or 90% instead of 60%.
- the width of the first ring-shaped area which is the clear area, increases the further away from the eye point toward the ear.
- the further away from the eye point toward the ear the position through which the line of sight passes on the eyeglass lens the more distant the vision is from the front view toward the ear and/or the side view is.
- the further away from the front view toward the ear the vision is from the front view toward the ear and/or the side view is, the easier it is for the line of sight to pass through the clear area.
- This allows for comfortable distance and/or side vision.
- blurring of objects is suppressed when checking traffic lights or the presence (lights) of other vehicles in the direction of the ear while driving, allowing for good safety checks.
- the requirement that the ear side width of each first ring-shaped region increases monotonically outward may be satisfied.
- the two widths may be equal, or the ear side width of the outer first ring-shaped region may be increased the more outward the first ring-shaped region is.
- the width on the ear side of a first ring-shaped region (one if there is an odd number of first ring-shaped regions, and both if there is an even number of first ring-shaped regions) midway between the first ring-shaped region farthest from the eye point and the first ring-shaped region closest to the eye point may be greater than the width on the nose side.
- the center of the second ring-shaped region farthest from the eyepoint may be set to the same position as the eyepoint. This configuration reduces the sense of incongruity caused by the centers of the second ring-shaped regions being different, improving the appearance of the eyeglass lens. In addition, by setting the center of the second ring-shaped region farthest from the eyepoint as the position of the eyepoint, it becomes easier to grasp the eyepoint when shaping the lens or fitting it to the wearer.
- the arrangement of the second ring-shaped region group (and thus the first ring-shaped region group, the central clear region, and the outer clear region) is not particularly limited, and can be determined, for example, from the viewpoint of the visibility of the second ring-shaped region group from the outside, the design provided by the second ring-shaped region group, the refractive effect of the second ring-shaped region group, etc.
- each second ring-shaped region and each first ring-shaped region is not limited to the preferred examples described above, and may be any size that has the effect of inhibiting the progression of myopia (or reducing hyperopia).
- each second ring-shaped region may be equal in all directions in plan view, and all the second ring-shaped regions may have the same width.
- each first ring-shaped region may increase in an arithmetic progression from the inside to the outside.
- each first ring-shaped region may be greater than the width of each adjacent second ring-shaped region. This makes it easier to ensure a good field of vision.
- a specific numerical range for each component is as follows: Width of the first annular region: 0.5-1.5 mm Width of the second ring region: 0.5-1.5 mm Ratio of the width of the second annular region to the width of the first annular region: 1:2 to 2:1
- the "ring width of the first annular region" is also the radial distance between the second annular regions.
- the above numerical range is a numerical range that satisfies the above condition 1 or condition 2.
- an example of the circumferential spacing between the second refractive regions in each second annular region may be 0 to 1.5 mm, and the value of (circumferential spacing between the second refractive regions in each second annular region)/(diameter of the second refractive region in each second annular region) may be 0 to 2.
- i is a natural number and indicates the order of the first ring-shaped region from the side closest to the eye point (inner side).
- the i-th first annular region from the inside is the region sandwiched between the i-th and (i+1)-th second annular regions from the inside.
- the number of second annular regions is k+1, and the maximum value of i, that is, the number of first annular regions, is k.
- each symbol is as follows: L [unit: mm]: distance from pupil to visual object (set to 200 mm or less here) D_i [unit: mm]: distance from the pupil to the center position of the i-th first ring-shaped area from the side closer to the eye point (inner side) (the central clear area is treated as the 0th area) W_i [unit: mm]: The width of the i-th first ring-shaped area on the nose side from the side closest to the eye point (inside) (the clear area on the central side is treated as the 0th area)
- W_1 ⁇ L/(LD_1) W_k ⁇ L/(LD_k)
- W_k/W_1 (LD_k)/(LD_1)
- a second annular region farthest from the eye point is disposed outside the first annular region farthest from the eye point;
- An outer clear area which is a first refractive area, may be disposed outside the second annular area that is farthest from the eye point.
- the outer clear area is an area in which the second annular area (defocus area) is not formed, similar to the central clear area.
- the lens substrate is made of a thermosetting resin material such as thiourethane, allyl, acrylic, epithio, etc.
- the resin material constituting the lens substrate may be another resin material that provides a desired refractive index.
- the lens substrate may be made of inorganic glass instead of a resin material.
- the hard coat film is formed, for example, using a thermoplastic resin or a UV-curable resin.
- the hard coat film can be formed by immersing the lens substrate in a hard coat liquid, or by using spin coating, etc. Coating the eyeglass lens with such a hard coat film can improve its durability.
- the anti-reflection film is formed by vacuum deposition of an anti-reflection agent such as ZrO 2 , MgF 2 , or Al 2 O 3.
- an anti-reflection agent such as ZrO 2 , MgF 2 , or Al 2 O 3.
- multiple defocus regions are formed on the object-side surface of the lens substrate. Therefore, when this surface is covered with a hard coat film and an anti-reflection film, multiple defocus regions are also formed by the hard coat film and the anti-reflection film, following the defocus regions in the lens substrate.
- a lens substrate is first molded by a known molding method such as cast polymerization.
- a mold having a molding surface with a plurality of recesses is used to perform molding by cast polymerization, thereby obtaining a lens substrate having a defocus region on at least one surface.
- a hard coat film is then formed on the surface of the lens substrate.
- the hard coat film can be formed by immersing the lens substrate in a hard coat liquid, spin coating, or the like.
- an anti-reflection film is further formed on the surface of the hard coat film by vacuum deposition of the raw material for the film.
- the thickness of the coating formed through the above steps may be, for example, in the range of 0.1 to 100 ⁇ m (preferably 0.5 to 5.0 ⁇ m, and more preferably 1.0 to 3.0 ⁇ m). However, the thickness of the coating is determined according to the function required of the coating, and is not limited to the range exemplified above.
- coatings include various coatings such as anti-reflective coatings, water-repellent or hydrophilic anti-soiling coatings, and anti-fogging coatings. Publicly known techniques can be applied to the formation of these coatings.
- ⁇ Glasses> The technical concept of the present invention is also reflected in eyeglasses in which the peripheral area of the above-mentioned eyeglass lens is cut based on a predetermined frame shape and the eyeglasses are fitted into an eyeglass frame.
- the eyeglass frame may be full-rim, half-rim, under-rim, or rimless.
- the technical idea of the present invention can also be applied to lenses after edging, as described in the above paragraph.
- at least a portion of the outermost (and possibly even further inside) second annular region may be cut by edging.
- the outermost second annular region in the lens after edging refers to the second annular region that has not been cut at all.
- the region between the second annular region that has not been cut at all and the periphery of the spectacle lens, other than the second annular region that has been cut at least partly, is the outer clear region.
- FIG. 4 is a front view showing a spectacle lens according to a further specific embodiment of the present invention, in which only the first, third, and fifth second ring-shaped regions, counting from the inside, are displaced to the left (nose side). Segments are omitted in FIG. 4.
- the technical idea of the present invention is also reflected in a method for designing a spectacle lens in which a second ring-shaped region as described above is disposed on at least one of the object-side surface and the eyeball-side surface in order to realize a spectacle lens according to one embodiment of the present invention.
- the technical idea of the present invention is also reflected in a method for manufacturing a spectacle lens in which a lens substrate is processed to realize a surface designed by this design method.
- Shape of the second refractive region (segment) in the second ring-shaped region in plan view Perfect circle. Alignment of the second refractive region (segment) in the second ring-shaped region in plan view: Linked in a circumferential direction (zero separation distance). Diameter of the second refractive region (segment) in the second annular region: 1.10 mm Planar shape of the second annular region: regular ring Defocus power of the second refractive region (segment) of the second annular region: 3.50D Range of central clear area: a circular area having a radius of 3.00 mm from the eye point EP. An outer clear area was provided outside the outermost second ring-shaped area.
- the table below numbers the second annular regions, with the side closest to the eyepoint being numbered 1 and the outside being numbered 2, and summarizes the coordinates and spacing (distance) (in mm) of the second annular regions for each number.
- FIG. 5 is a schematic explanatory diagram showing the segments of the second ring-shaped region in black in a front view of the eyeglass lens according to Comparative Example 1.
- Example 1 The eyeglass lenses according to the following table were produced. The rest of the specifications were the same as in Comparative Example 1.
- FIG. 6 is a schematic explanatory diagram showing the segments of the second ring-shaped region in black in a front view of the eyeglass lens according to Example 1, and the right-hand side view is a partially enlarged view of the left-hand side view.
- Example 1 Compared to Comparative Example 1, in Example 1, the second ring-shaped regions were densely arranged on the nose side of the spectacle lens through which the line of sight passes in near vision, so that the second ring-shaped regions could fully exert their refractive effect. Specifically, the apparent spacing of the second ring-shaped regions on the nose side (-x direction) was constant. As a result, compared to Comparative Example 1, in Example 1, the decrease in the refractive effect of the second ring-shaped regions in near vision can be suppressed. In addition, since the relationship between the radial spacing between the second ring-shaped regions and the circumferential spacing of each segment within each ring is constant, the wearing comfort can be maintained. And, because it employs a configuration in which the second ring-shaped regions are arranged in a ring (a concept as a Fresnel lens) despite being a DIMS lens, the increase in the difficulty of processing and measuring is suppressed.
- eyeglass lens 2 central clear area 3a: first annular area group 3b: second annular area group 4: outer clear area EP: eye point C: center of second annular area a: first refractive area b: second refractive area
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
Description
ヒトの目における屈折障害の進行を治療するための方法であって、(a)第1屈折力を有する第1光学領及び少なくとも1つの第2屈折力を有する第2光学領を備えるフレネルレンズを提供するステップと、(b)第1屈折力を用いて屈折障害を矯正するステップ及び第2屈折力を用いて少なくとも1つの焦点外れを発生させるステップと、を備える方法が特許文献1の請求項1に記載されている。
また、近視及び遠視は、ヒトの目の一般的な屈折障害であることが特許文献1の[0002]に記載されている。
また、ヒトの目における屈折障害の進行を治療するための方法は、第1光学領及び第2光学領を有するフレネルレンズを提供するステップを含むことが特許文献1の[0012]に記載されている。
処方屈折力を備えた上記第1光学領である交代中心光学領41、及び焦点はずれを発生させる上記第2屈折領である交代中心光学領42を有するフレネル型同心二重焦点もしくは多重焦点レンズが特許文献1の図4a及び図4bに記載されている。
眼の屈折異常を矯正する処方に基づく第1の屈折力を有する第1の屈折領域と、
前記第1の屈折力とは異なる屈折力を有し、眼の屈折異常の進行を抑制するように眼の網膜以外の位置に焦点を結ばせる機能を有する第2の屈折領域とを有し、
前記第2の屈折領域は、レンズの中心部の近傍にそれぞれ独立した多数の島状の領域として形成されたものであり、
前記第1の屈折領域は、前記第2の屈折領域が形成された領域以外に形成されたものであることを特徴とする眼鏡レンズが記載されている。この眼鏡レンズとして近視進行抑制レンズが記載されている。
図1Bは、近視進行抑制レンズの装用者の近くから発散光が近視進行抑制レンズを通過して瞳孔内に入射する際の球面波(φ4即ち瞳孔径4.0mmの範囲、眼球の後方に掲載)の様子を示した説明図である。
装用者の処方屈折力を実現する第1屈折力を有する第1屈折領域と、
第1屈折力とは異なる第2屈折力を有する第2屈折領域と、を備える眼鏡レンズであって、
物体側の面又は眼球側の面において第2屈折領域の少なくとも一部且つ複数の第2屈折領域が輪になって並んで配置され、
該輪は、内側輪と、該内側輪を包囲する外側輪とを備え、
眼鏡レンズを平面視したとき該内側輪の中心の位置と該外側輪の中心の位置は異なり、
以下のいずれかの条件を満たす、眼鏡レンズである。
<条件1>
各輪同士の径方向の間隔は、各輪内での第2屈折領域同士の周方向の間隔よりも広い。
<条件2>
各輪同士の径方向の間隔は、各輪内での第2屈折領域同士の周方向の間隔よりも狭い。
前記輪の少なくとも一部は、複数の第2屈折領域が数珠つなぎに連結して構成される、第1の態様に記載の眼鏡レンズである。
近視進行抑制効果を奏する眼鏡レンズであって、
第2屈折領域は第1屈折領域から見て突出部である、第1又は2の態様に記載の眼鏡レンズである。
第1又は2の態様に記載の眼鏡レンズと、眼鏡フレームと、を備える、眼鏡である。
第1輪状領域の輪の幅:0.5~1.5mm
第2輪状領域の輪の幅:0.5~1.5mm
第1輪状領域の輪の幅に対する第2輪状領域の輪の幅の比:1:2~2:1
本発明の一態様だと、この「第1輪状領域の輪の幅」は、各第2輪状領域同士の径方向の間隔でもある。上記数値範囲は、あくまで上記条件1又は条件2を満たしたうえでの数値範囲である。
なお、各第2輪状領域内での第2屈折領域同士の周方向の間隔の一例は0~1.5mmであってもよく、(各第2輪状領域内での第2屈折領域同士の周方向の間隔)/(各第2輪状領域内での第2屈折領域の径)の値は0~2であってもよい。
以下の条件式を満たしてもよい。
((L-D_k)/(L-D_1))3/2<W_k/W_1<((L-D_k)/(L-D_1))1/2
本明細書で挙げる眼鏡レンズは、物体側の面と眼球側の面とを有する。
「物体側の面」とは、眼鏡レンズを備えた眼鏡が装用者に装用された際に物体側に位置する表面である。
「眼球側の面」とは、その反対、すなわち眼鏡レンズを備えた眼鏡が装用者に装用された際に眼球側に位置する表面である。
物体側の面は凸面であり、眼球側の面は凹面であること、つまり眼鏡レンズはメニスカスレンズであることが一般的である。
右方(3時方向)を+x方向、左方(9時方向)を-x方向、上方(0時方向)を+y方向、下方(6時方向)を-y方向、物体側方向を+z方向、その逆方向(奥側方向)を-z方向とする。
x方向のことをx軸、y方向のことをy軸、z方向のことをz軸とも言う。本段落の内容を以下のように言い換え可能である。
「眼鏡レンズの装用状態において、物体側から眼球側に向けてレンズ中心を通る軸をz軸、下方から上方に向かいz軸に直交する軸をy軸、左から右に向かいz軸に直交する軸をx軸とする。」
本明細書において「耳側」とは、左眼用レンズではアイポイント(原点)からx>0の領域に向かう所定の一方向(例:+x方向)を指す。
「左眼用レンズではアイポイント(原点)からx<0の領域に向かう所定の一方向」は、近方視の際に視線が下がることを考慮すると、アイポイント(原点)からx<0且つy≦0の領域(好適には且つy≧2x)に向かう所定の一方向であってもよい。
また、本明細書において鼻側と耳側とは正反対の向きとしてもよい。その一方、例えば、鼻側の向きをy=xに沿った向きとしつつ耳側の向きをy=0に沿った向きとみなしてもよい。
右眼用レンズだと、本段落に記載の大小関係を逆にして鼻側及び耳側を定義可能である。
図3は、本発明の一態様に係る眼鏡レンズを示す正面図であって、内側から数えて4番目の第2輪状領域のみ、左側(鼻側)に変位させた際の図である。
尚、図3では第2輪状領域が6個の場合を例示しているが、後掲の各実施例では第2輪状領域を11個設けている。
符号1は眼鏡レンズを指し、符号2は中心側クリア領域(後掲)を指し、符号4は外側クリア領域(後掲)を指す。符号EPはアイポイントを指す。符号3aは第1輪状領域群(後掲)を指し、符号3bは第2輪状領域群(後掲)を指す。符号3a、3bの後ろの数値1、2、3・・・は、アイポイントEPに近い順番を示す。符号Cは第2輪状領域の中心を指し、符号Cの後ろの数値1、2、3・・・は、第2輪状領域3b1、3b2、3b3・・・の各々の中心を指す。図3では、アイポイントEPから最も離れた第2輪状領域3b9の中心とアイポイントEPが等しい場合を例示している。以降、符号は省略する。
装用者の処方屈折力を実現する第1屈折力を有する第1屈折領域と、
第1屈折力とは異なる第2屈折力を有する第2屈折領域と、を備える眼鏡レンズであって、
物体側の面又は眼球側の面において第2屈折領域の少なくとも一部且つ複数の第2屈折領域が輪になって並んで配置され、
該輪は、内側輪と、該内側輪を包囲する外側輪とを備え、
眼鏡レンズを平面視したとき該内側輪の中心の位置と該外側輪の中心の位置は異なり、
以下のいずれかの条件を満たす、眼鏡レンズである。
<条件1>
各輪(後掲の各第2輪状領域)同士の径方向の間隔は、各輪(後掲の各第2輪状領域)内での第2屈折領域同士の周方向の間隔よりも広い。
<条件2>
各輪(後掲の各第2輪状領域)同士の径方向の間隔は、各輪(後掲の各第2輪状領域)内での第2屈折領域同士の周方向の間隔よりも狭い。
そして、各第2輪状領域に挟まれ且つ第1屈折領域により構成される第1輪状領域を複数備える。この複数の第1輪状領域を第1輪状領域群と称する。
そして、アイポイントから外側に向けて各第1輪状領域と各第2輪状領域とが交互に隣接して配置される。
中心側クリア領域の大きさ及び形状には限定は無い。中心側クリア領域の大きさの下限の一つの目安としては、アイポイントEPを中心とした直径5.00mmの円を包含可能な大きさであればよい。中心側クリア領域の大きさの上限の一つの目安としては、アイポイントEPを中心とした直径10.00mmの円内に収まる大きさであればよい。中心側クリア領域の面積は80mm2以下であってもよい。中心側クリア領域の形状は、平面視で回転対称形状であってもよく、例えば円形状であってもよい。
本段落に記載の例が好適ではあるが、全ての第2輪状領域の個数のうち60%以上及び/又は全ての第2輪状領域の総面積のうち60%以上が鼻側に単調変位という規定を用いても構わない。60%の代わりに70%、80%、又は90%という数値を採用するのが好ましい。
本段落に記載の例が好適ではあるが、全ての第2輪状領域の個数のうち60%以上及び/又は全ての第2輪状領域の総面積のうち60%以上が本段落に記載の単調増加を満たすという規定を用いても構わない。60%の代わりに70%、80%、又は90%という数値を採用するのが好ましい。
本段落に記載の例が好適ではあるが、全ての第1輪状領域の個数のうち60%以上及び/又は全ての第1輪状領域の総面積のうち60%以上が本段落に記載の単調減少を満たすという規定を用いても構わない。60%の代わりに70%、80%、又は90%という数値を採用するのが好ましい。
本段落に記載の例が好適ではあるが、全ての第1輪状領域の個数のうち60%以上及び/又は全ての第1輪状領域の総面積のうち60%以上が本段落に記載の単調増加を満たすという規定を用いても構わない。60%の代わりに70%、80%、又は90%という数値を採用するのが好ましい。
第1輪状領域の輪の幅:0.5~1.5mm
第2輪状領域の輪の幅:0.5~1.5mm
第1輪状領域の輪の幅に対する第2輪状領域の輪の幅の比:1:2~2:1
本発明の一態様だと、この「第1輪状領域の輪の幅」は、各第2輪状領域同士の径方向の間隔でもある。上記数値範囲は、あくまで上記条件1又は条件2を満たしたうえでの数値範囲である。
なお、各第2輪状領域内での第2屈折領域同士の周方向の間隔の一例は0~1.5mmであってもよく、(各第2輪状領域内での第2屈折領域同士の周方向の間隔)/(各第2輪状領域内での第2屈折領域の径)の値は0~2であってもよい。
内側からi番目の第1輪状領域は内側からi番目とi+1番目の第2輪状領域に挟まれた領域となる。 また、第2輪状領域数をk+1し、iの最大値すなわち第1輪状領域数をkとする。各符号の定義は以下の通りである。
L[単位:mm]:瞳孔から視対象までの距離(ここでは200mm以下に設定)
D_i[単位:mm]:瞳孔から、アイポイントに近い側(内側)からi番目の第1輪状領域の中心の位置までの距離(中心側クリア領域は0番目扱いとする。)
W_i[単位:mm]:アイポイントに近い側(内側)からi番目の第1輪状領域の鼻側の幅(中心側クリア領域は0番目扱いとする。)
W´_i=W_i×L/(L-D_i)
ほとんどの第1輪状領域において上記「見かけ上の幅」が互いに等しいのが最適な構成であるが、実効的には「見かけ上の幅」の相違が最も起こりやすい、アイポイントに近い側である1番目の第1輪状領域と、最も外側にあるk番目の第1輪状領域とで、上記「見かけ上の幅」が等しいのが好ましい。これを考慮すると、以下の式を満たすのが好ましい。
W_1×L/(L-D_1)=W_k×L/(L-D_k)
この式を整理すると、以下が第1輪状領域の幅の好適条件を示す式である。
W_k/W_1=(L-D_k)/(L-D_1)
つまり、上式の左辺と右辺とが等しいのが好ましい。
W´_k/W´_1=(L-D_1)/(L-D_k)
この右辺の平方根に相当する値になれば、見かけ上の領域幅の相違が半減以下になるとみなせる。これを考慮すると、以下の式を満たすのが好ましい。
((L-D_1)/(L-D_k))-1/2<W´_k/W´_1<((L-D_1)/(L-D_k))1/2
なお、上式の下限値は、もともとの相違を過剰に補正することへの許容を考慮している。より具体的には、W_k/W_1が1を下回るような過剰補正がおきた場合、W´_1/W´_kが、前記平方根に相当する値よりも小さければ良いとしている。
上記式を先の好適条件に当てはめると以下の条件式が得られる。
((L-D_k)/(L-D_1))3/2<W_k/W_1<((L-D_k)/(L-D_1))1/2
アイポイントから最も遠い第2輪状領域の外側には第1屈折領域である外側クリア領域が配置されてもよい。外側クリア領域は、中心側クリア領域と同様、第2輪状領域(デフォーカス領域)が形成されていない領域である。
レンズ基材は、例えば、チオウレタン、アリル、アクリル、エピチオ等の熱硬化性樹脂材料によって形成されている。尚、レンズ基材を構成する樹脂材料としては、所望の屈折度が得られる他の樹脂材料を選択してもよい。また、樹脂材料ではなく、無機ガラス製のレンズ基材としてもよい。
そして、レンズ基材を得たら、次いで、そのレンズ基材の表面に、ハードコート膜を成膜する。ハードコート膜は、ハードコート液にレンズ基材を浸漬させる方法や、スピンコート等を使用することにより、形成することができる。
ハードコート膜を成膜したら、更に、そのハードコート膜の表面に、反射防止膜を成膜する。反射防止膜は、該膜のための原料を真空蒸着により成膜することにより、形成することができる。
このような手順の製造方法により、物体側に向けて突出する複数のデフォーカス領域を物体側の面に有する眼鏡レンズが得られる。
所定のフレーム形状に基づいて上記眼鏡レンズの周縁近傍をカットし、眼鏡フレームに嵌め入れた眼鏡にも本発明の技術的思想が反映されている。眼鏡フレームの種類、形状等には限定は無く、フルリム、ハーフリム、アンダーリム、リムレスであってもよい。
本発明の技術的範囲は上記態様に限定されるものではなく、発明の構成要件やその組み合わせによって得られる特定の効果を導き出せる範囲において、種々の変更や改良を加えた形態も含む。
以下の左眼用の眼鏡レンズを作製した。尚、眼鏡レンズはレンズ基材のみからなり、レンズ基材に対する他物質による積層は行っていない。処方屈折力としてS(球面屈折力)は0.00Dとし、C(乱視屈折力)は0.00Dとした。アンカットレンズである眼鏡レンズにおいて、アイポイントを幾何中心と一致させた。以降に記載の表の座標は、アイポイントを原点に配置したときの座標である。
・レンズ基材の平面視での直径:60.00mm
・レンズ基材の種類:PC(ポリカーボネート)
・レンズ基材の屈折率:1.589
・第2輪状領域を形成した面:物体側の面
・第2輪状領域内の第2屈折領域(セグメント)の平面視での形状:正円
・第2輪状領域内の第2屈折領域(セグメント)の平面視での整列態様:円周方向に数珠つなぎ(離間距離ゼロ)
・第2輪状領域内の第2屈折領域(セグメント)の径:1.10mm
・第2輪状領域の平面視での形状:正円環
・第2輪状領域の第2屈折領域(セグメント)のデフォーカスパワー:3.50D
・中心側クリア領域の範囲:アイポイントEPから半径3.00mmの円の領域
尚、最も外側の第2輪状領域よりも外側に外側クリア領域を設けた。
以下の表は、アイポイントに最も近い側の番号を1、その外側の番号を2としたときに第2輪状領域に番号を付し、各番号の第2輪状領域の座標及び間隔(距離)(単位はmm)をまとめた表である。
以下の表の内容の眼鏡レンズを作製した。それ以外は比較例1と同様とした。
2・・・中心側クリア領域
3a・・・第1輪状領域群
3b・・・第2輪状領域群
4・・・外側クリア領域
EP・・・アイポイント
C・・・第2輪状領域の中心
a・・・第1屈折領域
b・・・第2屈折領域
Claims (4)
- 装用者の処方屈折力を実現する第1屈折力を有する第1屈折領域と、
第1屈折力とは異なる第2屈折力を有する第2屈折領域と、を備える眼鏡レンズであって、
物体側の面又は眼球側の面において第2屈折領域の少なくとも一部且つ複数の第2屈折領域が輪になって並んで配置され、
該輪は、内側輪と、該内側輪を包囲する外側輪とを備え、
眼鏡レンズを平面視したとき該内側輪の中心の位置と該外側輪の中心の位置は異なり、
以下のいずれかの条件を満たす、眼鏡レンズ。
<条件1>
各輪同士の径方向の間隔は、各輪内での第2屈折領域同士の周方向の間隔よりも広い。
<条件2>
各輪同士の径方向の間隔は、各輪内での第2屈折領域同士の周方向の間隔よりも狭い。 - 前記輪の少なくとも一部は、複数の第2屈折領域が数珠つなぎに連結して構成される、請求項1に記載の眼鏡レンズ。
- 近視進行抑制効果を奏する眼鏡レンズであって、
第2屈折領域は第1屈折領域から見て突出部である、請求項1又は2に記載の眼鏡レンズ。 - 請求項1又は2に記載の眼鏡レンズと、眼鏡フレームと、を備える、眼鏡。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480051117.4A CN121620725A (zh) | 2023-08-16 | 2024-08-08 | 眼镜镜片和眼镜 |
| JP2025540669A JPWO2025037573A1 (ja) | 2023-08-16 | 2024-08-08 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023-132493 | 2023-08-16 | ||
| JP2023132493 | 2023-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025037573A1 true WO2025037573A1 (ja) | 2025-02-20 |
Family
ID=94632299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2024/028366 Pending WO2025037573A1 (ja) | 2023-08-16 | 2024-08-08 | 眼鏡レンズ及び眼鏡 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2025037573A1 (ja) |
| CN (1) | CN121620725A (ja) |
| WO (1) | WO2025037573A1 (ja) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008514318A (ja) | 2004-09-30 | 2008-05-08 | ザ ホンコン ポリテクニック ユニヴァーシティ | 光学的治療方法 |
| US20120062836A1 (en) * | 2010-09-09 | 2012-03-15 | Tse Yan Yin | Method and system for retarding the progression of myopia |
| US20170131567A1 (en) | 2015-11-06 | 2017-05-11 | Hoya Lens Thailand Ltd. | Spectacle Lens |
| WO2019166657A1 (en) | 2018-03-01 | 2019-09-06 | Essilor International | Lens element |
| WO2020045567A1 (ja) | 2018-08-31 | 2020-03-05 | ホヤ レンズ タイランド リミテッド | 眼鏡レンズ、眼鏡レンズの製造方法および眼鏡レンズ用被膜 |
| CN111103701A (zh) | 2020-01-02 | 2020-05-05 | 温州医科大学 | 一种表面具有环带柱面微结构的眼镜片 |
| JP2021531496A (ja) * | 2018-07-12 | 2021-11-18 | サイトグラス・ヴィジョン・インコーポレイテッド | 子供の近視を抑制するための方法とデバイス |
| WO2021249846A1 (en) | 2020-06-12 | 2021-12-16 | Essilor International | Lens element |
| WO2023007028A1 (en) * | 2021-07-30 | 2023-02-02 | Essilor International | Lens element |
| JP2023517946A (ja) * | 2020-03-11 | 2023-04-27 | ブリエン ホールデン ビジョン インスティチュート リミテッド | アトロピン又は関連化合物の使用と併せて、近視の進行を補正し、減速させ、軽減し、及び/又は制御するための眼科用レンズ及び方法 |
| JP2023531255A (ja) * | 2020-06-26 | 2023-07-21 | ブリエン ホールデン ビジョン インスティチュート リミテッド | 眼用レンズのための幾何学的に定義された形状および/または外形の光学要素、およびそのような幾何学的に定義された形状および/または外形の光学要素を形成するための方法 |
-
2024
- 2024-08-08 WO PCT/JP2024/028366 patent/WO2025037573A1/ja active Pending
- 2024-08-08 JP JP2025540669A patent/JPWO2025037573A1/ja active Pending
- 2024-08-08 CN CN202480051117.4A patent/CN121620725A/zh active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008514318A (ja) | 2004-09-30 | 2008-05-08 | ザ ホンコン ポリテクニック ユニヴァーシティ | 光学的治療方法 |
| US20120062836A1 (en) * | 2010-09-09 | 2012-03-15 | Tse Yan Yin | Method and system for retarding the progression of myopia |
| US20170131567A1 (en) | 2015-11-06 | 2017-05-11 | Hoya Lens Thailand Ltd. | Spectacle Lens |
| WO2019166657A1 (en) | 2018-03-01 | 2019-09-06 | Essilor International | Lens element |
| JP2021524051A (ja) * | 2018-03-01 | 2021-09-09 | エシロール・アンテルナシオナル | レンズ要素 |
| JP2021531496A (ja) * | 2018-07-12 | 2021-11-18 | サイトグラス・ヴィジョン・インコーポレイテッド | 子供の近視を抑制するための方法とデバイス |
| WO2020045567A1 (ja) | 2018-08-31 | 2020-03-05 | ホヤ レンズ タイランド リミテッド | 眼鏡レンズ、眼鏡レンズの製造方法および眼鏡レンズ用被膜 |
| CN111103701A (zh) | 2020-01-02 | 2020-05-05 | 温州医科大学 | 一种表面具有环带柱面微结构的眼镜片 |
| JP2023517946A (ja) * | 2020-03-11 | 2023-04-27 | ブリエン ホールデン ビジョン インスティチュート リミテッド | アトロピン又は関連化合物の使用と併せて、近視の進行を補正し、減速させ、軽減し、及び/又は制御するための眼科用レンズ及び方法 |
| WO2021249846A1 (en) | 2020-06-12 | 2021-12-16 | Essilor International | Lens element |
| JP2023531255A (ja) * | 2020-06-26 | 2023-07-21 | ブリエン ホールデン ビジョン インスティチュート リミテッド | 眼用レンズのための幾何学的に定義された形状および/または外形の光学要素、およびそのような幾何学的に定義された形状および/または外形の光学要素を形成するための方法 |
| WO2023007028A1 (en) * | 2021-07-30 | 2023-02-02 | Essilor International | Lens element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2025037573A1 (ja) | 2025-02-20 |
| CN121620725A (zh) | 2026-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102815317B1 (ko) | 안경 렌즈 및 안경 렌즈 설계 방법 | |
| KR101973004B1 (ko) | 캐리어 및 프레넬 박막을 포함하는 안과용 렌즈의 표면을 결정하는 방법 및 그러한 표면을 포함하는 안과용 렌즈 | |
| KR100940699B1 (ko) | 누진 굴절력 렌즈 | |
| EP2909673B1 (en) | Method for determining an ophthalmic lens comprising an aspherical continuous layer on one of its faces and an aspherical fresnel layer on one of its faces | |
| EP4403984A1 (en) | Spectacle lens | |
| US20250271687A1 (en) | Lens element, optical lens group, mold, and spectacles | |
| JP2026063121A (ja) | 眼鏡レンズの設計方法、眼鏡レンズの製造方法、眼鏡レンズ及び眼鏡 | |
| JP2026063122A (ja) | 眼鏡レンズの設計方法、眼鏡レンズの製造方法、眼鏡レンズ及び眼鏡 | |
| WO2024262170A1 (ja) | 眼鏡、および、眼鏡レンズ | |
| CN218068482U (zh) | 一种散光离焦眼镜片及眼镜 | |
| WO2025037573A1 (ja) | 眼鏡レンズ及び眼鏡 | |
| WO2025037572A1 (ja) | 眼鏡レンズ及び眼鏡 | |
| CN118805128A (zh) | 眼镜镜片、眼镜镜片的制造方法、眼镜镜片的设计方法、眼镜以及眼镜的制造方法 | |
| JP7842543B2 (ja) | 眼鏡レンズ | |
| JP2025139229A (ja) | 眼鏡レンズ及び眼鏡レンズの設計方法 | |
| WO2025191922A1 (ja) | 眼鏡レンズ |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24854163 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2025540669 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2025540669 Country of ref document: JP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024854163 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |