CN209992764U - Invisible trifocal spectacle lens - Google Patents
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- CN209992764U CN209992764U CN201920774449.1U CN201920774449U CN209992764U CN 209992764 U CN209992764 U CN 209992764U CN 201920774449 U CN201920774449 U CN 201920774449U CN 209992764 U CN209992764 U CN 209992764U
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- 230000000007 visual effect Effects 0.000 claims abstract description 126
- 230000004438 eyesight Effects 0.000 claims abstract description 108
- 208000001491 myopia Diseases 0.000 claims abstract description 88
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 201000009310 astigmatism Diseases 0.000 claims description 18
- 230000002123 temporal effect Effects 0.000 claims description 9
- 230000000750 progressive effect Effects 0.000 claims description 7
- 238000001746 injection moulding Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 abstract description 5
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- 230000004379 myopia Effects 0.000 description 5
- 210000001747 pupil Anatomy 0.000 description 4
- 230000004304 visual acuity Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 201000010041 presbyopia Diseases 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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Abstract
An invisible three-focus spectacle lens belongs to the technical field of spectacles. The spectacle lens is set into a far distance visual area, a far and middle distance mixed area, a middle distance visual area, a middle and near distance mixed area and a near distance visual area from top to bottom. The boundary line between the far vision zone and the far and middle distance mixing zone is set to be arc top shape, dome shape, flat top shape and a line shape. The upper side edge of the far and middle distance mixing area is 1mm to 6mm from the lower side of the optical center, the middle distance visual area is set to be a uniform refractive power area with the height of 2mm to 6mm, and the upper side edge of the near distance visual area is 7mm to 12mm from the lower side of the optical center. The distance of the far vision zone is based on the distance of 5m to 1m of a standard far vision chart, the distance of the middle vision zone is based on the distance of 1m to 60cm of a standard near vision chart, the distance of the near vision zone is based on the distance of 50cm to 30cm of the standard near vision chart, three independent vision zone diopter degrees are customized through subjective refraction, and the near vision zone is provided with a substrate towards a nose side triangular prism lens.
Description
Technical Field
The utility model belongs to the technical field of glasses, specifically speaking, according to individual lens person near subjective optometry customization of far and middle school, provide a lens of near whole excellent eyesight of far and middle school.
Background
With the aging population, presbyopia vision correction has become one of the global concerns. Whether the old people are emmetropic or myopic, the old people can see clear objects in the whole process by seeing a long distance, a middle distance or a short distance only by needing different correction degrees. The existing single-vision lens can not correct the far vision or the near vision at the same time, and the bifocal lens and the progressive multi-focus lens can correct the far vision and the near vision, but can still not correct the intermediate vision and can not obtain the clear intermediate vision.
The trifocal intraocular lens is designed according to three focus specifications of 5m long distance, 80cm middle distance and 40cm short distance, and the intraocular lens cannot realize individual design and different specification requirements. The myopia of children and teenagers is mainly corrected by using a frame spectacle lens, and clear vision in the distance, middle and near whole process is required to be obtained.
Trifocal spectacles remain one of the technical difficulties in the ophthalmic and spectacle fields.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a have far and near whole excellent vision of journey, individualized intangible trifocal lens.
The purpose of the utility model is realized by the following technical proposal.
An intangible trifocal ophthalmic lens is a spectacle lens for frames, hereinafter referred to as such ophthalmic lens. The spectacle lens comprises three independent visual areas of a far vision area, an intermediate vision area and a near vision area, and two mixed areas of a far-intermediate distance mixed area and a medium-near distance mixed area. The far distance visual area is located the horizontal meridian upside of lens optics center, occupies lens first half, connects being located the horizontal meridian downside of lens optics center of far distance visual area, occupies lens latter half, is far away intermediate range mixed zone, intermediate range visual area, well low range mixed zone, low range visual area from last to down in proper order.
The distance viewing zone and the far distance mixing zone are connected to form a boundary line which is in a shape of an arc top, a dome, a flat top and a line, or the distance viewing zone and the far distance mixing zone are connected to form two boundary lines, wherein one boundary line is in a shape of a downward arc top or a dome, the other boundary line is in a shape of an upward arc top or a dome, and the centers of the two boundary lines are at least 20mm and are connected to form a line.
The width of the independent visual area and the mixed area is set to be equal to the diameter of the spectacle lens, the height of the far visual area is set to be 40% to 60% of the diameter of the spectacle lens, the total height of the far and intermediate distance mixed area and the intermediate distance visual area is set to be 15% to 30% of the diameter of the spectacle lens, and the total height of the intermediate and near visual areas is set to be 20% to 40% of the diameter of the spectacle lens. The upper side edge of the far and middle distance mixing area is 1mm to 6mm from the lower side of the optical center, the middle distance visual area is set to be a uniform refractive power area with the height of 2mm to 6mm, and the upper side edge of the near distance visual area is 7mm to 12mm from the lower side of the optical center.
The spectacle dispenser takes the required distance of the far, middle and near vision of an individual as a reference, the distance of the far vision zone is taken as a reference according to the distance from 5m to 1m of a standard far vision chart, the distance of the middle vision zone is taken as a reference according to the distance from 1m to 60cm of the standard near vision chart, and the distance of the near vision zone is taken as a reference according to the distance from 50cm to 30cm of the standard near vision chart, and three independent vision zone diopter powers are customized through subjective refraction. The gradient difference value of the refractive power of two adjacent independent visual areas is +/-0.01D to +/-0.24D, the refractive power of the two adjacent independent visual areas is fused and consistent by the mixed area, so that a convex-concave interface at the joint is changed into a smooth interface, and a substrate facing towards the nose side triangular prism lens is arranged in the near visual area.
The spectacle lens is formed by numerical control garage grinding or mold injection molding, the power of the far vision area is arranged on the front surface of the spectacle lens, the power of the intermediate distance vision area, the power of the near vision area and the power of the two mixed areas are arranged on the rear surface of the spectacle lens, or the three independent vision areas and the two mixed areas are arranged on the rear surface of the spectacle lens.
The distance vision zone occupies a range of 160 DEG to 190 DEG of the circumference of the upper half portion of the spectacle lens, and the distance and intermediate vision zone, the intermediate and near vision zone and the near vision zone occupy a range of 160 DEG to 190 DEG of the circumference of the lower half portion of the spectacle lens.
The middle distance visual area, the middle distance mixed area and the near distance visual area of the spectacle lens are set to have the same top shape as the far distance mixed area.
The spectacle lens can also be set as a five-zone progressive multi-focus lens, and sequentially set as a far distance visual area, a far and middle distance mixed area, an intermediate distance visual area, a middle and near distance mixed area, a near distance visual area, a nasal side astigmatism area and a temporal side astigmatism area brought by gradual change of refractive power, or a nasal upper side astigmatism area, a nasal lower side astigmatism area, a temporal upper side astigmatism area and a temporal lower side astigmatism area brought by gradual change of refractive power from the upper half part to the lower half part of the spectacle lens, wherein the intermediate distance visual area is set as a uniform refractive power area with the height of 2mm to 6 mm.
The area of the far-vision zone of the ophthalmic lens is set to occupy 40% to 60% of the total area of the ophthalmic lens, the area of the far-intermediate mixing zone and the area of the near-vision zone are set to occupy 15% to 30% of the total area of the ophthalmic lens, and the area of the intermediate-near mixing zone and the area of the near-vision zone are set to occupy 20% to 40% of the total area of the ophthalmic lens.
Preferably, the height of the far vision zone of the spectacle lens is set to be 50% of the length of the spectacle lens diameter, the total height of the far and intermediate distance mixed zones is set to be 20% of the length of the spectacle lens diameter, and the total height of the intermediate and near vision zones is set to be 30% of the length of the spectacle lens diameter.
Preferably, the distance between the far and middle distance of the spectacle lens and the upper edge of the mixed area is from 2mm to 4mm below the optical center, the height of the middle distance visual area is from 2mm to 4mm, and the distance between the upper edge of the near distance visual area and the lower edge of the optical center is from 9mm to 12mm and ends at the edge of the spectacle lens.
The far-middle distance mixed area and the middle-short distance mixed area are set to be gradual change zones with the width of 0.5mm to 1.5mm, at least more than 2 gradual change zones are set, and the gradient difference value of the diopter degrees of two adjacent independent visual areas is +/-0.05D.
The spectacle lens comprises three independent visual areas, namely a far vision area, an intermediate vision area and a near vision area, wherein the distance of the far vision area is based on a standard far vision chart of 5m, the distance of the intermediate vision area is based on a standard near vision chart of 80cm, the distance of the near vision area is based on a standard near vision chart of 40cm, and the refractive power of the three independent visual areas is customized through subjective refraction.
In the spectacle lens, a lens dispenser sets different types of lenses according to the distance requirements of the individual for far, middle and near vision, the distance of a far vision zone is based on the distance of 2m of a standard far vision chart, the distance of a middle vision zone is based on the distance of 1m of a standard near vision chart, and the distance of a near vision zone is based on the distance of 40cm of the standard near vision chart.
Or the distance of the long-distance visual area is based on the distance of 1m of the standard far vision chart, the distance of the middle-distance visual area is based on the distance of 60cm of the standard near vision chart, and the distance of the short-distance visual area is based on the distance of 40cm of the standard near vision chart.
Or a distance vision area is provided with a plain lens, a middle distance vision area is based on the distance of 80cm to 60cm of a standard near vision chart, a near vision area is based on the distance of 40cm to 30cm of the standard near vision chart, and the three independent vision area diopter powers are customized through subjective refraction.
Three independent vision zones of the spectacle lens, the power of the concave lens: the distance visual area is smaller than the intermediate visual area and smaller than the near visual area, the intermediate visual area is arranged according to the 30-60% of the refractive power of the near visual area, and the near visual area is arranged according to the positive addition value of + 0.50D-3.50D. The near vision area of the spectacle lens is set to be a base towards the nose side triangular prism lens, and the prism power is 0.5 delta to 10.0 delta, or the near vision area is set to be a base towards the lower side triangular prism lens, and the prism power is 0.3 delta to 1.5 delta.
Compared with the prior art, the utility model beneficial effect be:
1. the utility model discloses the lens adopts brand-new optical surface type design, and optical surface shape is provided with far away visual area, intermediate range visual area, the three independent visual area of low coverage, has the high-quality vision of near whole distance in far away, and the lens sets up far away intermediate range mixed area and intermediate range mixed area for three independent visual area junction convex-concave interface becomes smooth interface, forms intangible trifocal lens.
2. The utility model provides a three focus lens of individualized intangible with near whole excellent vision of far-middle-distance.
3. The spectacle lens is suitable for being worn by the old and also suitable for being worn by the myopia of children and teenagers.
Drawings
FIG. 1 is a schematic diagram of a curved-top intangible trifocal ophthalmic lens;
FIG. 2 is a schematic structural diagram of a dome-shaped intangible trifocal ophthalmic lens;
FIG. 3 is a schematic diagram of a flat-top intangible trifocal ophthalmic lens;
FIG. 4 is a schematic diagram of a linear intangible trifocal ophthalmic lens;
FIG. 5 is a schematic view of the structure of an invisible trifocal ophthalmic lens with a far distance vision zone in the shape of a downward arc-top and a far distance mixing zone in the shape of an upward arc-top;
FIG. 6 is a schematic diagram of a progressive multifocal intangible trifocal ophthalmic lens;
FIG. 7 is a schematic structural diagram of an invisible trifocal ophthalmic lens on the side of the composite substrate facing the nose;
FIG. 8 is a schematic view of the structure of an intangible trifocal ophthalmic lens with the composite substrate facing the underside;
in the figure: 1 distance vision zone; 2 a far-middle distance mixing zone; 3 middle distance visual area; 4 a near mixing zone; 5 a near vision area; 6 a gradual change zone; a 7-concave lens; an 8-convex lens; 9 base face nose prism lens; 10 base facing down side triangular prism; 11 blind areas.
Detailed Description
The utility model discloses a following embodiment provides one kind and has near whole excellent vision, individualized intangible trifocal lens of far and middle.
The term meaning in this specification:
the height of the pupil is the distance from the center of the pupil to the lower edge of the frame, and the height of the pupil is at least 22mm to 30mm, and the height of the pupil can be set to be larger than 30mm in order to ensure that the distance, the middle and the near vision area can be fully and comfortably utilized.
The boundary line of the lens: the boundary between two areas of an ophthalmic lens is called the dividing line.
Shape of boundary line top: the division into different shapes is divided according to the position of the boundary line, the highest point of the boundary line is called a dome shape, the slightly lower point of the boundary line is called an arc top shape, the middle point of the boundary line is called a flat top shape or a line shape, and the boundary line of the dome shape and the arc top shape is also called a circular top shape.
The invention is described in further detail below with reference to the following figures and embodiments:
an intangible trifocal ophthalmic lens is a spectacle lens for frames, hereinafter referred to as such ophthalmic lens. The spectacle lens comprises a far vision area, an intermediate vision area and a near vision area which are three independent vision areas, and a far-intermediate mixing area and an intermediate-near mixing area which are two mixing areas. The three separate viewing zones are provided to ensure distance and intermediate and near vision, especially to obtain intermediate distance clear vision. The far distance visual area is located the horizontal meridian upside of lens optics center, occupies lens first half, connects being located the horizontal meridian downside of lens optics center of far distance visual area, occupies lens latter half, is far away intermediate range mixed zone, intermediate range visual area, well low range mixed zone, low range visual area from last to down in proper order. The middle distance visual area, the middle distance mixed area and the short distance visual area are arranged in the same top shape as the far distance mixed area. The mixed zone is set to fuse the refractive powers of two adjacent independent visual zones to be consistent, so that a convex-concave interface at a joint is changed into a smooth interface, and the refractive boundary of the three-focus spectacle lens is intangible. The far-middle distance mixing area and the middle-middle distance mixing area are set to be gradual change belts with the width of 0.5mm to 1.5mm, and at least more than 2 gradual change belts are set.
The junction between the distance viewing zone and the remote distance mixing zone forms a dividing line which is arranged in a curved top shape (see fig. 1), a dome shape (see fig. 2), a flat top shape (see fig. 3), a line shape (see fig. 4), or two dividing lines which are arranged in a downward curved top shape or a dome shape and in an upward curved top shape or a dome shape and are connected to each other at least 20mm or more at the center of the two dividing lines to form a line (see fig. 5). Such lenses are preferably trifocal with a curved vertex shape and a dome shape for one dividing line, or with a curved vertex shape for two dividing lines. The spectacle lens is formed by numerical control car house grinding or mold injection molding, and preferably, the numerical control car house grinding is selected to form an arc top shape or a dome shape. The flat-top or linear trifocal spectacle lens is formed by injection molding through a mold.
The spectacle lens can also be provided with a five-zone progressive addition lens (as shown in figure 6), and the five-zone progressive addition lens is sequentially provided with a far vision zone, a far and intermediate distance mixed zone, an intermediate distance vision zone, an intermediate and near distance mixed zone, a near vision zone, a nasal side astigmatism zone and a temporal side astigmatism zone brought by power gradient, or an upper nasal side astigmatism zone, a lower nasal side astigmatism zone, an upper temporal side astigmatism zone and a lower temporal side astigmatism zone brought by power gradient from the upper half part to the lower half part of the spectacle lens. The conventional progressive multi-focus lens is set to be a far distance visual area, a gradual change area, a near distance visual area and a blind area, and no intermediate distance visual area exists, so that clear intermediate distance vision cannot be obtained. The utility model discloses increase the multifocal lens that advances gradually for the intermediate distance sight district, the intermediate distance sight district sets up to the even unanimous region of high 2mm to 6 mm's diopter, ensures that the intermediate distance obtains fresh vision.
The near vision area of the spectacle lens is set to be a base towards a nose side triangular prism lens (as shown in figure 7), and the prism power is 0.5 delta to 10.0 delta, so that the spectacle lens is suitable for external-oblique myopia. Or the near vision area is set with the substrate facing the lower triangular prism lens (as shown in fig. 8), and the prism power is 0.3 delta to 1.5 delta.
The width of the independent viewing zone and the mixed zone is set to be equal to the diameter of the spectacle lens. The height of the distance vision zone is set to a length of 40% to 60% of the diameter of the spectacle lens, the total height of the distance vision zone and the intermediate vision zone is set to a length of 15% to 30% of the diameter of the spectacle lens, and the total height of the intermediate vision zone and the intermediate vision zone is set to a length of 20% to 40% of the diameter of the spectacle lens. Preferably, the height of the distance vision region is set to a length of 50% of the diameter of the spectacle lens, the total height of the far distance mixing region and the intermediate distance vision region is set to a length of 20% of the diameter of the spectacle lens, and the total height of the intermediate distance mixing region and the near vision region is set to a length of 30% of the diameter of the spectacle lens.
Design parameters of the spectacle lens: the upper side edge of the far and middle distance mixing area is 1mm to 6mm from the lower side of the optical center, the middle distance visual area is set to be a uniform refractive power area with the height of 2mm to 6mm, and the upper side edge of the near distance visual area is 7mm to 12mm from the lower side of the optical center. Preferably, the upper side edge of the far and middle distance mixing area is 2mm to 4mm from the lower part of the optical center, the middle distance visual area is set to be 2mm to 4mm in height, and the upper side edge of the near distance visual area is 9mm to 12mm from the lower part of the optical center and ends at the edge of the spectacle lens.
The lens dispenser can obtain clear vision at different far, middle and near distances only by setting different correction distance lenses according to the required distance of the individual far, middle and near eyes and the different eye distances for different professions. For example, clear vision beyond 5 meters is needed when driving a car, and vision correction is needed at different distances when watching television, computers and books indoors. The distance vision zone is generally based on the distance of 5m to 1m of a standard distance vision chart, the intermediate vision zone is based on the distance of 1m to 60cm of the standard near vision chart, and the near vision zone is based on the distance of 50cm to 30cm of the standard near vision chart, and three independent vision zone diopter powers are customized through subjective refraction. The visual acuity chart has the scores of a logarithmic visual acuity chart and a decimal visual acuity chart, and the international standard visual acuity chart is generally adopted in China. The distance of the eye chart influences the detection result, and is especially important for the refractive power of the intermediate vision zone and the near vision zone. The myopia watch can be a wood or metal ruler which can not be bent and is provided with centimeter scales, and the distance visual area and the near visual area degree in the spectacle lens can be customized through accurate subjective refraction.
The gradient difference of the powers of the two adjacent independent visual areas is +/-0.01D to +/-0.24D, and the gradient difference of the powers of the two adjacent independent visual areas is preferably +/-0.05D, so that the spectacle lens with the gradient difference of +/-0.05D is customized. The gradient difference value of the prior spectacle lens is +/-0.25D, the gradient difference value is too large, the spectacle lens is not suitable for individual precise customization, the gradient difference value is reduced to +/-0.05D, the spectacle lens is more suitable for overlarge refractive power of two adjacent independent visual areas, and the reduction of the gradient difference value is also beneficial to the reduction of the refractive power of a mixed area. The Chinese patent name of the patent applicant: a +/-0.01D refractive gradient difference optometry lens, Chinese patent application No. 2018218244235, discloses an additional optometry lens, combines the existing +/-0.25D refractive gradient difference optometry lens with the gradient difference +/-0.05D additional optometry lens, and customizes the refractive power of an independent visual area and reduces the refractive power of a mixed area more accurately.
The far distance visual area diopter number sets up at the lens front surface, and intermediate distance visual area and low coverage district and two mixed zones set up at the lens rear surface, and perhaps three independent visual area and two mixed zones all set up at the lens rear surface, and perhaps intermediate distance visual area and low coverage district and two mixed zones set up at the lens front surface, and the far distance visual area diopter number sets up at the lens rear surface, forms compound two-sided intangible trifocal lens.
The range occupied by each independent visual area and each mixed area of the spectacle lens is as follows according to the occupied circumferential axis position: the distance vision zone occupies the range of 160 ° to 190 ° of the circumference of the upper half of the ophthalmic lens, with the aim of ensuring a sufficient distance vision. The far-intermediate distance mixed zone, the intermediate distance visual zone, the intermediate distance mixed zone and the near visual zone occupy the range of 160-190 degrees of the circumference of the lower half part of the spectacle lens.
The range occupied by each independent visual area and each mixed area of the spectacle lens is as follows according to the occupied area: the area of the distance vision zone is set to occupy 40% to 60% of the total area of the spectacle lens, the area of the far-intermediate distance mixing zone and the area of the near vision zone are set to occupy 15% to 30% of the total area of the spectacle lens, and the area of the intermediate-near distance mixing zone and the area of the near vision zone are set to occupy 20% to 40% of the total area of the spectacle lens. Preferably, the area of the distance vision zone is set to occupy 50% of the total area of the ophthalmic lens, the area of the far-intermediate mixing zone and the area of the near vision zone are set to occupy 20% of the total area of the ophthalmic lens, and the area of the intermediate-near mixing zone and the area of the near vision zone are set to occupy 30% of the total area of the ophthalmic lens.
In the general type or standard type lens of the spectacle lens, three independent visual area diopter powers are preferably customized through subjective refraction by taking the distance of a long-distance visual area as a reference according to a standard far vision chart of 5m, taking the distance of an intermediate distance visual area as a reference according to a standard near vision chart of 80cm and taking the distance of a short-distance visual area as a reference according to a standard near vision chart of 40 cm.
The lens dispenser sets different types of lenses according to the requirements of the distance between the far and the middle and the near vision of an individual, and for indoor workers, particularly for persons with middle and near vision, the distance of the far vision zone is based on the distance of 2m of a standard far vision chart, the distance of the middle vision zone is based on the distance of 1m of the standard near vision chart, and the distance of the near vision zone is based on the distance of 40cm of the standard near vision chart.
For indoor workers, especially for watching television, the distance visual zone is based on the distance of 1m of the standard far vision chart, the distance visual zone is based on the distance of 60cm of the standard near vision chart, and the distance visual zone is based on the distance of 40cm of the standard near vision chart.
For computer workers, the distance of the main eye is between 80cm and 30cm, a plano lens is arranged in a far vision area, the distance of an intermediate vision area is based on the distance of 80cm to 60cm of a standard near vision chart, the distance of a near vision area is based on the distance of 40cm to 30cm of the standard near vision chart, three independent vision area diopter degrees are customized through subjective refraction, and the vision range of the intermediate vision area and the vision range of the near vision area are enlarged through the spectacle lens.
Three different dioptric powers and three independent visual area concave lens dioptric powers are set according to the near-sighted dioptric power and the far-middle near-distance subjective refraction of a dispenser: distance zone < intermediate zone < near zone. And grading the light and the medium-heavy degree according to the myopic diopter number of the glasses-matched person, wherein the distance vision area is provided with a concave lens or a flat lens, and the near vision area is provided with a convex lens. The intermediate vision zone is set according to the diopter number of the near vision zone from 30% to 60%, and the near vision zone is set according to the positive addition value from +0.50D to + 3.50D.
The utility model discloses the lens adopts the design of brand-new optical zone, and the design of optics shape of face has clear remote, intermediate distance and closely vision for the three independent visual area of distance visual area, intermediate distance visual area, low coverage visual area. According to different requirements of individual lens dispensers for long distance, middle distance and short distance, the subjective optometry is customized individually and accurately. The intangible trifocal ophthalmic lens design produces unexpected technical effects with prominent substantive features and significant advances. The spectacle lens is a new generation of presbyopia correcting and controlling spectacles, and is also suitable for preventing and treating myopia of children and teenagers between 6 and 18 years old.
Finally, it should be clarified that: it is also within the scope of the present invention to vary and modify the design parameters of the distance viewing zone, the intermediate viewing zone, the near viewing zone, and the blending zone described in the present invention.
Claims (10)
1. An invisible trifocal spectacle lens is a frame spectacle lens, and is characterized in that: the spectacle lens comprises three independent visual areas of a far visual area, an intermediate visual area and a near visual area, and two mixed areas of the far-intermediate visual area and the intermediate-intermediate visual area, wherein the far visual area is positioned on the upper side of an optical center horizontal meridian of the spectacle lens and occupies the upper half part of the spectacle lens, the far visual area is connected with the far visual area and is positioned on the lower side of the optical center horizontal meridian of the spectacle lens and occupies the lower half part of the spectacle lens, and the far-intermediate visual area, the intermediate-near mixed area and;
the long-distance visual area and the far-middle distance mixing area are connected to form a boundary line, the boundary line is in an arc top shape, a dome shape, a flat top shape and a linear shape, or the long-distance visual area and the far-middle distance mixing area are connected to form two boundary lines, one of the boundary lines is in a downward arc top shape or a dome shape, the other one of the boundary lines is in an upward arc top shape or a dome shape, and the centers of the two boundary lines are at least 20mm and are connected to form a line;
the widths of the independent visual area and the mixed area are equal to the diameters of the spectacle lenses, the height of the long-distance visual area is set to be 40-60% of the diameter of the spectacle lenses, the total height of the far-intermediate distance mixed area and the middle-distance visual area is set to be 15-30% of the diameter of the spectacle lenses, the total height of the middle-near distance mixed area and the short-distance visual area is set to be 20-40% of the diameter of the spectacle lenses, the upper side edge of the far-intermediate distance mixed area is 1-6 mm from the lower side of the optical center, the middle-distance visual area is set to be a uniform refractive power area with the height of 2-6;
the spectacle dispenser takes the required distance of far, middle and near eyes of an individual as a reference, the distance of a far vision area is taken as a reference according to a distance from 5m to 1m of a standard far vision chart, the distance of an intermediate vision area is taken as a reference according to a distance from 1m to 60cm of a standard near vision chart, the distance of a near vision area is taken as a reference according to a distance from 50cm to 30cm of the standard near vision chart, three independent vision area refractive powers are customized through subjective refraction, the gradient difference value of the refractive powers of two adjacent independent vision areas is +/-0.01D to +/-0.24D, the adjacent two independent vision areas are fused and consistent through a mixing area, a convex-concave interface at the joint is changed into a smooth interface, and a;
the spectacle lens is formed by numerical control garage grinding or mold injection molding, the power of the far vision area is arranged on the front surface of the spectacle lens, the power of the intermediate distance vision area, the power of the near vision area and the power of the two mixed areas are arranged on the rear surface of the spectacle lens, or the three independent vision areas and the two mixed areas are arranged on the rear surface of the spectacle lens.
2. An intangible trifocal ophthalmic lens according to claim 1, wherein: the far vision zone occupies the range of 160 DEG to 190 DEG of the circumference of the upper half portion of the spectacle lens, and the far and intermediate distance mixed zone, the intermediate distance vision zone, the intermediate and near distance mixed zone and the near vision zone occupy the range of 160 DEG to 190 DEG of the circumference of the lower half portion of the spectacle lens.
3. An intangible trifocal ophthalmic lens according to claim 1, wherein: the middle distance visual area, the middle distance mixed area and the near distance visual area of the spectacle lens are in the same top shape with the far distance mixed area.
4. An intangible trifocal ophthalmic lens according to claim 1, wherein: the spectacle lens is a five-zone progressive multi-focus lens, and is sequentially arranged into a far distance visual area, a far and middle distance mixed area, an intermediate distance visual area, a middle and short distance mixed area, a near distance visual area, a nasal side astigmatism area and a temporal side astigmatism area brought by gradual change of refractive power, or a nasal upper side astigmatism area, a nasal lower side astigmatism area, a temporal upper side astigmatism area and a temporal lower side astigmatism area brought by gradual change of refractive power, wherein the intermediate distance visual area is arranged into a uniform refractive power area with the height of 2mm to 6 mm.
5. An intangible trifocal ophthalmic lens according to claim 1, wherein: the distance vision zone area is set to occupy 40% to 60% of the total area of the ophthalmic lens, the far-intermediate distance mixed zone and the intermediate distance vision zone area are set to occupy 15% to 30% of the total area of the ophthalmic lens, and the intermediate distance mixed zone and the near vision zone area are set to occupy 20% to 40% of the total area of the ophthalmic lens.
6. An intangible trifocal ophthalmic lens according to claim 1, wherein: the height of the far vision region is set to be 50% of the length of the diameter of the spectacle lens, the total height of the far distance mixing region and the middle distance vision region is set to be 20% of the length of the diameter of the spectacle lens, and the total height of the middle near distance mixing region and the near vision region is set to be 30% of the length of the diameter of the spectacle lens.
7. An intangible trifocal ophthalmic lens according to claim 1, wherein: the edge starts from optics center below 2mm to 4mm on far and middle range mixed zone, and the middle range visual zone sets up to height 2mm to 4mm, and the short distance visual zone upper flank is 9mm to 12mm, ends at the lens edge apart from optics center below, and far and middle range mixed zone sets up to width 0.5mm to 1.5mm gradual change area, sets up gradual change area more than 2 at least, and two adjacent independent visual zone diopter gradient difference are 0.05D.
8. An intangible trifocal ophthalmic lens according to claim 1, wherein: and the distance visual area, the middle visual area and the near visual area are respectively based on the standard far vision chart with the distance of 5m as a reference, the standard near vision chart with the distance of 80cm as a reference and the standard near vision chart with the distance of 40cm as a reference, and the three independent visual area diopter degrees are customized through subjective refraction.
9. An intangible trifocal ophthalmic lens according to claim 1, wherein: in the spectacle lenses, a lens dispenser sets different types of lenses according to the distance requirements of the individual for the far, middle and near vision, the far vision area takes the distance of 2m according to the standard far vision chart as the standard, the middle vision area takes the distance of 1m according to the standard near vision chart as the standard, and the near vision area takes the distance of 40cm according to the standard near vision chart as the standard;
or the distance of the long-distance visual area is based on the distance of 1m of the standard far vision chart, the distance of the middle-distance visual area is based on the distance of 60cm of the standard near vision chart, and the distance of the short-distance visual area is based on the distance of 40cm of the standard near vision chart;
or a distance vision area is provided with a plain lens, a middle distance vision area is based on the distance of 80cm to 60cm of a standard near vision chart, a near vision area is based on the distance of 40cm to 30cm of the standard near vision chart, and the three independent vision area diopter powers are customized through subjective refraction.
10. An intangible trifocal ophthalmic lens according to claim 1, wherein: the three separate vision zones, concave lens powers: the far distance visual area is less than the intermediate distance visual area and is less than the near distance visual area, the intermediate distance visual area is set according to near distance visual area diopter 30% to 60%, the near distance visual area is set according to positive addition value +0.50D to +3.50D, the near distance visual area sets up to the basement towards nose side triangular prism piece, and the prism power is 0.5 delta to 10.0 delta, perhaps the near distance visual area sets up to the basement towards downside triangular prism piece, and the prism power is 0.3 delta to 1.5 delta.
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| CN201920774449.1U CN209992764U (en) | 2019-05-22 | 2019-05-22 | Invisible trifocal spectacle lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415780A (en) * | 2020-11-29 | 2021-02-26 | 段亚东 | Individualized three-focus frame spectacle lens |
| US11963868B2 (en) | 2020-06-01 | 2024-04-23 | Ast Products, Inc. | Double-sided aspheric diffractive multifocal lens, manufacture, and uses thereof |
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2019
- 2019-05-22 CN CN201920774449.1U patent/CN209992764U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11963868B2 (en) | 2020-06-01 | 2024-04-23 | Ast Products, Inc. | Double-sided aspheric diffractive multifocal lens, manufacture, and uses thereof |
| CN112415780A (en) * | 2020-11-29 | 2021-02-26 | 段亚东 | Individualized three-focus frame spectacle lens |
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