CN114994948A - Frame spectacle lens - Google Patents
Frame spectacle lens Download PDFInfo
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- CN114994948A CN114994948A CN202210845037.9A CN202210845037A CN114994948A CN 114994948 A CN114994948 A CN 114994948A CN 202210845037 A CN202210845037 A CN 202210845037A CN 114994948 A CN114994948 A CN 114994948A
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- defocus
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- 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
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- 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
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- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
The invention relates to the technical field of myopia correction glasses, in particular to a frame spectacle lens which comprises a substrate, wherein the substrate is provided with a central area, the periphery of the central area is provided with a plurality of defocusing areas formed by a plurality of concave annular zones, and a correction area is arranged between the adjacent defocusing areas. Embodiments of the present invention provide a spectacle lens with a frame that corrects central refractive error by a correction zone while correcting peripheral retinal hyperopic defocus of a myopic eye by a peripheral defocus zone and avoids a phenomenon of further hyperopic defocus of the peripheral retina, thereby suppressing the increase of the ocular axis and the progression of myopia induced by the peripheral retinal hyperopic defocus.
Description
Technical Field
The invention relates to the technical field of myopia correction glasses, in particular to a frame spectacle lens.
Background
Experts believe that hyperopic defocus at the periphery of retina is the main reason for increasing the myopia degree, and it is acknowledged that the orthokeratology lens with the myopia control function solves the problem through the reversal geometric design to control the increase of the axis of the eye, thereby achieving the purpose of controlling the myopia development. Meanwhile, many clinical researches show that after a myopic child wears a single-lens, the hyperopic defocus amount of peripheral retina is increased, and the design of the glasses which conform to the peripheral refraction state of human eyes becomes a new idea for controlling the myopia progress.
Meanwhile, many researches show that the peripheral refractive states have symmetry at corresponding parts of the left eye and the right eye, but the hypermetropia defocusing at the temporal side is obviously larger than that at the nasal side, and the peripheral refractive states of people with different myopia degrees are different. Fig. 1 shows RPPE (peripheral refractive power) profiles at horizontal gaze angles for the high and medium myopia groups, where-30, -20, -10 are temporal retinal decentration gaze angles and 10, 20, 30 are nasal retinal decentration gaze angles. Whether myopic or not, the relative central defocus amount increases with the increase of the fixation angle, and when reaching 30 degrees, the relative defocus amount reaches 2.00-3.00D.
Human vision is a sensitive area at 10 degrees, information can be correctly identified at 10-20 degrees, 20-30 degrees are sensitive to dynamic things, when the visual angle of the image in the vertical direction is 20 degrees and the visual angle in the horizontal direction is 36 degrees, the human vision has very good visual presence, and fatigue is not caused by frequent eyeball rotation. In addition, most people have a greater temporal aspect than inferior to nasal aspect than superior, which is related to the distribution of visual sensory cells on the retina.
Most of the myopia correction lenses provided by the existing products do not consider individual difference of the peripheral diopter of the retina and difference of different parts, which may cause myopic defocus which cannot fully ensure that the peripheral retina of some wearers has 360 degrees, and the condition may influence the effectiveness of myopia control.
Compared with the common frame glasses, the functional frame glasses with the myopia control function have the vision definition degree reduced, the phenomenon is commonly known and accepted in the industry, but the functional frame glasses have better visual effect on the premise of ensuring the functionality, and are the strong appeal of wearers.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides a spectacle frame lens that solves the technical problems set forth in the background above.
To achieve the above object, an aspect of the present invention provides a spectacle frame lens comprising a substrate having a central region, a plurality of out-of-focus regions formed by a plurality of zones of concave zones being disposed around the central region, and correction regions being disposed between adjacent out-of-focus regions.
The defocusing light area comprises a nasal side defocusing area and a temporal side defocusing area, and the distance from the farthest end of the nasal side defocusing area to the center of the central area is as follows.
In the formula (1), i is the serial number of the plurality of focus-separating areas from inside to outside,
the distance from the most distal end of the nose-side out-of-focus region to the center of the central region in the ith out-of-focus region, PD is expressed as the pupil diameter of the human eye,
showing the viewing angle of the nose side of the lens,
indicating the width of one of the out-of-focus regions,
indicating the width of one of the correction zones.
The distance from the most far end of the nose side to the center of the central area is.
In the formula (2), the reaction mixture is,
is the distance from the most distal of said temporal out-of-focus region in the ith said out-of-focus region to the center of said central region,
showing the viewing angle of the nose side of the lens.
Preferably, the defocus amounts of the plurality of defocus regions () are the same, and the diopter of the defocus regions is.
In formula (3), PW is the diopter of the out-of-focus area,
is the diopter of the central area, and D is the fixed defocus amount.
Preferably, when defocus amounts of the plurality of defocus regions are different, the diopter of the defocus region is.
In the formula (4), the reaction mixture is,
is the diopter of the out-of-focus zone,
is the optical power of the central zone in question,
the defocus amounts for different focus positions.
Preferably, the
Is in the range of ± 20 °, said
Is in the range of ± 30 °.
Preferably, the
And said
Is in the range of 0.5mm to 3 mm.
Compared with the prior art, the invention provides the frame spectacle lens which has the following beneficial effects.
1. The frame spectacle lens provided by the invention corrects the central ametropia through the correction area, simultaneously corrects the peripheral retina hyperopic defocus of the myopic eye by using the peripheral defocus area, and avoids the peripheral retina further hyperopic defocus phenomenon, thereby inhibiting the eye axis growth and myopia progression induced by the peripheral retina hyperopic defocus.
2. When the frame spectacle lens provided by the invention is used, if the peripheral diopters of the retinas at the two sides of the nose and the temple of a wearer are obviously asymmetric and the difference is large, the visual angles at the two sides of the nose and the temple are not consistent, and the visual angles are taken
，
At this time, it can be found
The nasal side is from the focal area and the temporal side is from the focal area and is asymmetric structure promptly, and a plurality of nasal sides from focal area 3 are from the focal area and are semicircle zonal, and the temporal side is from the focal area and is similar ellipse circular zonal, and the distance of the most distal end of temporal side from the focal area to 2 centers in the center has certain skew for the nasal side from the focal area to more be applicable to the person of wearing of the peripheral diopter of nasal temporal both sides retina, make the person of wearing have better visual effect, improve the validity of myopia control.
Drawings
Fig. 1 is a graph of RPPE (peripheral refractive power) variation at horizontal gaze angle for the high myopia group and the medium low myopia group.
Fig. 2 is a cross-sectional view of a spectacle lens frame provided by an embodiment of the present invention.
Fig. 3 is a top view of a spectacle frame lens provided by an embodiment of the present invention.
Fig. 4 is a front view of a spectacle lens frame provided by an embodiment of the present invention.
Fig. 5 is a frame spectacle lens of a two-focus structure with the same defocus amount at the symmetrical position of the nasal temporal side provided by the embodiment of the invention.
Fig. 6 is a frame spectacle lens of a multifocal structure with the same defocus amount at symmetrical positions on the nasal temporal side provided by the embodiment of the present invention.
Fig. 7 is a frame spectacle lens of a two-focus structure with different defocus amounts at symmetrical positions on the nasal temporal side provided by the embodiment of the invention.
Fig. 8 is a frame spectacle lens of a multifocal structure with different defocus amounts at symmetrical positions on the nasal temporal side provided by an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a sectional view of a spectacle frame lens according to an embodiment of the present invention, fig. 3 is a plan view of the spectacle frame lens according to the embodiment of the present invention, and fig. 4 is a front view of the spectacle frame lens according to the embodiment of the present invention. Embodiments of the present invention provide a spectacle frame lens, as shown in fig. 2 to 4, which comprises a substrate 1, the substrate 1 having a central region 2, a plurality of out-of-focus regions 3 composed of a plurality of zones of concave zones being provided on the periphery of the central region 2, and correction regions 4 being provided between adjacent out-of-focus light regions 3. Wherein the concave zone constituting the out-of-focus zone 3 is set with the concave surface of the spectacle lens frame as a reference surface.
Embodiments of the present invention provide framed ophthalmic lenses that correct central refractive errors by the correction zone 4 while correcting peripheral retinal hyperopic defocus of myopic eyes by the peripheral defocus zone 3 and avoid the peripheral retina from further hyperopic defocus, thereby suppressing the increase in the ocular axis and the progression of myopia induced by peripheral retinal hyperopic defocus.
The following table is an example of the structural design parameters (two foci) of a spectacle lens for a frame provided by an embodiment of the present invention.
Fig. 5 is a spectacle frame with a bifocal structure in which the defocus amount at the symmetrical position on the nasal/temporal side is the same, fig. 6 is a spectacle frame with a multifocal structure in which the defocus amount at the symmetrical position on the nasal/temporal side is the same, fig. 7 is a spectacle frame with a bifocal structure in which the defocus amount at the symmetrical position on the nasal/temporal side is different, and fig. 8 is a spectacle frame with a multifocal structure in which the defocus amount at the symmetrical position on the nasal/temporal side is different. As shown in fig. 5 to 8, in one embodiment of the present invention, the defocus area 3 of the spectacle lens of the frame is divided into a nasal-side defocus area and a temporal-side defocus area with the center of the central area 2 as a boundary, wherein the distance from the farthest end of the nasal-side defocus area to the center of the central area is.
In the formula (1), i is the serial number of the plurality of the defocusing areas 3 from inside to outside,
the distance from the most distal end of the focal region to the center of the central region 2 on the nasal side in the ith defocus region 3, PD is expressed as the pupil diameter of the human eye,
showing the angle of view of the nose side of the lens,
the width of one out-of-focus zone 3 is indicated,
indicating the width of one correction zone 4.
The nasal side is at a distance from the most distal end of the focal zone to the center of the central zone 2.
In the formula (2), the reaction mixture is,
the distance from the most distal end of the temporal out-of-focus region in the ith out-of-focus region 3 to the center of the central region 2,
showing the viewing angle of the nose side of the lens.
The substrate 1 can be designed to be a concave spherical surface + a convex aspheric surface, a concave aspheric surface + a convex spherical surface or a concave-convex surface double-non-design, generally, human eyes are required to see clear images within a field of view of +/-20 degrees (namely, a field angle of 40 degrees), and therefore perfect images within the field of view of +/-20 degrees are required to be formed in the design of the lens as much as possible.
In the embodiment of the invention, if the peripheral diopters of the retinas at the two sides of the nose and the temporal part of the wearer are symmetrical and the difference is small, the visual angles at the two sides of the nose and the temporal part can be consistent, namely
At this time, it can be found that
That is, the nasal side defocus area and the temporal side defocus area are symmetrically configured, and as shown in fig. 5 and 6, the plurality of defocus areas 3 are all in the shape of a complete circular ring.
In embodiments of the invention, if the peripheral refractive power of the retina on both sides of the nose and the temples of the wearer is not significantSymmetrically, when the difference is large, the visual angles on the two sides of the nose and the temples are not consistent, and the two visual angles are taken
，
At this time, it can be found that
That is, the nasal defocus area and the temporal defocus area are asymmetric structures, as shown in fig. 7 and 8, the nasal defocus areas of the multiple defocus areas 3 are semicircular band-shaped, the temporal defocus areas are similar elliptical band-shaped, and the distance from the farthest end of the temporal defocus area to the center of the central area 2 has a certain offset relative to the nasal defocus area, so that the nasal defocus area and the temporal defocus area are more suitable for wearers of peripheral diopters of retinas on two sides of the nose and the temporal, the wearers have better visual effect, and the effectiveness of myopia control is improved.
In the embodiment of the present invention, as shown in fig. 5 and 7, if the defocus amounts of the plurality of defocus regions 3 are designed to be the same, that is, the spectacle lens for frame has two focuses, the central region 2 and the plurality of correction regions 4 are the same focus, the plurality of defocus regions 3 are the same focus, and the defocus region 3 has diopter.
In the formula (3), PW is the diopter of the defocus area 3,
is the diopter of the central zone and D is the fixed defocus.
Further, if the defocus amounts of the plurality of defocus areas 3 are designed to be different, that is, the spectacle lens has two focuses, and the diopter of each defocus area 3 is.
In the formula 4, the first step is,
is the diopter of the out-of-focus region 3,
is the power of the central zone in the form of,
the defocus amounts at different focus positions.
In embodiments of the invention where the minimum line distance resolvable at photopic distance of the human eye is 0.05mm to 0.3mm, so as to avoid diffraction effects, the width of each zone of the peripheral optical zone must be greater than the minimum line distance resolvable by the human eye, typically 10 times the minimum line distance, so that the width of each zone from the focal zone and the correction zone is 0.5mm to 3mm, i.e. 0.05mm to 0.3mm
And
is in the range of 0.5mm to 3 mm.
The frame spectacle lens provided by the embodiment of the invention corrects the central ametropia through the correction area 4, simultaneously corrects the peripheral retina hyperopic defocus of the myopic eye through the peripheral defocus area 3, and avoids the peripheral retina further hyperopic defocus phenomenon, thereby inhibiting the eye axis growth and myopia progression induced by the peripheral retina hyperopic defocus; if the peripheral diopters of the retinas at the two sides of the nose and the temple of the wearer are obviously asymmetric and the difference is large, the visual angles at the two sides of the nose and the temple are not consistent, and the method takes the visual angles
， 
At this time, it can be found
The nasal side is from the focal area and the temporal side is from the focal area and is asymmetric structure promptly, and a plurality of nasal sides from focal area 3 are from the focal area and are semicircle zonal, and the temporal side is from the focal area and is similar ellipse circular zonal, and the distance of the most distal end of temporal side from the focal area to 2 centers in the center has certain skew for the nasal side from the focal area to more be applicable to the person of wearing of the peripheral diopter of nasal temporal both sides retina, make the person of wearing have better visual effect, improve the validity of myopia control.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A spectacle frame lens, characterized in that it comprises a substrate (1), said substrate (1) having a central zone (2), said central zone (2) being peripherally provided with a plurality of out-of-focus zones (3) consisting of a plurality of zones of concave circumferential shape, adjacent out-of-focus zones (3) being between correction zones (4);
the defocused light area (3) comprises a nasal side focal area and a temporal side focal area, and the distance from the farthest end of the nasal side focal area to the center of the central area is as follows:
in the formula (1), i is the serial number of the plurality of the defocusing areas (3) from inside to outside,
the distance from the most far end of the nose-side focusing area in the ith focusing area (3) to the center of the central area (2), PD is expressed as the diameter of the pupil of the human eye,
showing the viewing angle of the nose side of the lens,
indicating the width of one of the out-of-focus regions,
represents the width of one of said correction zones (4);
the distance from the most far end of the nose side to the center of the central area (2) is as follows:
in the formula (2), the reaction mixture is,
is the distance from the most distal end of the temporal out-of-focus area in the ith out-of-focus area (3) to the center of the central area (2),
showing the viewing angle of the nose side of the lens.
2. Spectacle frame lens according to claim 1, characterized in that the defocus amounts of the multiple defocus zones (3) are the same, the diopters of the defocus zones (3) being:
in the formula (3), PW is the diopter of the out-of-focus area (3),
is the diopter of the central area (2) and D is the fixed defocus amount.
3. Spectacle frame lens according to claim 1, characterised in that the defocused areas (3) differ by the amount of defocus, the power of the defocused areas (3) being:
in the formula (4), the reaction mixture is,
is the diopter of the out-of-focus zone (3),
is the diopter of said central zone (2),
the defocus amounts at different focus positions.
4. The spectacle frame lens of claim 1, wherein the lens is a spectacle frame lens
Is in the range of ± 20 °, said
Is in the range of ± 30 °.
5. The spectacle frame lens of claim 1, wherein the lens is a spectacle frame lens
And said
In the range of 0.5mm to 3 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845037.9A CN114994948B (en) | 2022-07-19 | 2022-07-19 | Frame spectacle lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845037.9A CN114994948B (en) | 2022-07-19 | 2022-07-19 | Frame spectacle lens |
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| CN114994948B CN114994948B (en) | 2022-11-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117111328A (en) * | 2023-10-08 | 2023-11-24 | 华创星瞳(北京)医学科技有限责任公司 | Adjustable high-precision myopia defocusing prevention and control glasses |
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| CN114994948B (en) | 2022-11-25 |
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