CN115236877A - Myopia control contact lens - Google Patents
Myopia control contact lens Download PDFInfo
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- CN115236877A CN115236877A CN202110435600.0A CN202110435600A CN115236877A CN 115236877 A CN115236877 A CN 115236877A CN 202110435600 A CN202110435600 A CN 202110435600A CN 115236877 A CN115236877 A CN 115236877A
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- optical
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- contact lens
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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
- G02C7/04—Contact lenses for the eyes
- G02C7/041—Contact lenses for the eyes bifocal; multifocal
- G02C7/044—Annular configuration, e.g. pupil tuned
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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
- G02C7/04—Contact lenses for the eyes
- G02C7/047—Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae
Abstract
The invention provides a myopia control contact lens, wherein a contact lens body sequentially comprises a first optical area, a second optical area, a third optical area, a fourth optical area and a peripheral area from the center to the outside, the first optical area and the third optical area are myopia correction areas, the first optical area and the fourth optical area are myopia control areas, the second optical area is in an interrupted annular optical design, namely a first peripheral focal area and a second peripheral focal area which are different in diopter are arranged in a crossed mode in the annular shape; therefore, the focus points causing different positive aberrations in the annular area are utilized to achieve myopia control and avoid the ghost phenomenon caused by excessive peripheral defocus.
Description
Technical Field
The invention relates to the technical field of glasses, in particular to a myopia control contact lens.
Background
Our eye is a delicate optical system that produces vision from the cooperation of structures such as the cornea, the crystal, the retina, the ocular axis, etc. The process of visual development is also influenced by many factors, such as living environment, eye habits, diseases, genes \8230, etc., which are related to the fact that when the total refractive power of the eyeball is too high, the light of objects located far away is focused and imaged to fall in front of the retina rather than on the retina, which is called myopia (short-sight), whereas when the total refractive power of the eyeball is too low, the light of objects located far away is focused and imaged to fall behind the retina rather than on the retina, which is called hyperopia (farsight).
According to the research result of the prior art, the prevalence rate of myopia of children is higher than 40%, retinopathy caused by high myopia (more than or equal to-5.00D) also becomes the main cause of blindness of many children, and according to the other research result of the prior art, the probability of high myopia retinopathy is improved by 1.52 times. Myopia prevention and control has become a global health issue that is not negligible.
At present, the clinical myopia control methods can be mainly divided into two categories, 1, drug control, 2 and optical control.
Most of the clinical drugs for myopia control are Atropine (Atropine) and pirenzepine (pinezepine) which are both acetylcholine blocking agents (Cholinoceptor blocking), and although long-term use of the drugs can effectively control the myopia process, the biggest defects are that the drugs can cause slight stabbing pain and discomfort and photophobia to influence daily life.
One of the main bases of the optical control is that the Earl l l. smith III doctor proposed the theory of peripheral defocus in the 2013 paper. Overriding past cognition, he believes that imaging stimuli at the periphery of the retina are the key to the determination of myopia progression, rather than what was believed in the past to be determined by imaging stimuli at the center of the retina, (Relative peripheral focus parallel reactive distance in injury monkeys, 2009) (Effects of Local focal focus on reflective Development in monkeys, 2013). The speed of eye growth is inhibited by the use of multifocal lenses causing myopic defocus (Peripheral retinal defocus), the most common of which is corneal remodelling (Ortho-K), but which, in addition to the discomfort of wearing, also have the potential for corneal health concerns due to improper lens cleaning, are hard-wearing contact lenses. In order to improve the above problems, patients would turn to choose daily disposable soft contact lenses with the same myopia control efficacy, such as Cooper Vision MiSight (Cooper Vision MiSight), but the soft contact lenses of this kind of design also have relative disadvantages, and due to the design of peripheral defocus, the peripheral image is located in front of the retina, which is easy to generate ghost image with the central image, resulting in blurred vision, this situation requires unequal adaptation period of 7-14 days, and children are easy to generate rejection phenomenon in initial wearing to give up treatment, or the normal learning effect of children is affected. Therefore, it is an object of the present invention to provide a solution to the above-mentioned problems.
Disclosure of Invention
The main purpose of the present invention is to provide a myopia control contact lens, in which the higher the positive number of peripheral defocus, the better the myopia control effect, but the more obvious the image blurring and ghosting phenomena will be, which will affect the use will and myopia control effect of the wearer, and the present invention can provide high-intensity peripheral defocus to control myopia and at the same time provide clear vision correction.
To achieve the above object, the myopia control contact lens of the present invention includes a contact lens body having a first optical zone, a second optical zone, a third optical zone, a fourth optical zone and a peripheral zone in sequence from the center to the outside. The first optical zone is a myopic negative power correction zone, and the negative power diopter is corrected and compensated according to the diopter; the second optical area is a near vision control area, is designed in an interval type annular optical mode, and is formed by crossly arranging a first out-of-focus control area and a second out-of-focus control area which are different in diopter into an annular shape, and the second optical area is positive diopter compared with the first optical area; the third optical zone is a near vision correction zone, and the diopter of the third optical zone is the same as or close to that of the first optical zone; the fourth optical zone is another near vision control zone, and the fourth optical zone has a positive diopter compared with the first optical zone and the third optical zone; and a peripheral zone for providing fixed positioning of the contact lens on the eye.
In a preferred embodiment of the present invention, the diopter of the first peripheral defocus control area is increased by +1.0D to +3.5D compared to the diopter of the first optical area, and the diopter of the second peripheral defocus control area is smaller than that of the first peripheral defocus control area.
In a preferred embodiment of the present invention, the diopter range of the third optical zone is ± 1.0 diopter of the first optical zone.
In a preferred embodiment of the present invention, the diopter of the fourth optical area is increased by +1.0D to +5.0D compared with the diopter of the first optical area and the third optical area.
In a preferred embodiment of the present invention, the diameter of the first optical zone ranges from 2.0mm to 4.0mm; the diameter range of the second optical area is 4.5 mm-6.0 mm; the diameter range of the third optical zone is 5.5 mm-7.0 mm; the diameter of the fourth optical zone ranges from 6.5mm to 8.5mm.
In a preferred embodiment of the present invention, the surface-to-surface ratio of the first defocus control region and the second defocus control region in the second optical region is from 1. The preferred range is that the area distribution ratio has the best implementation effect of 7.
The invention has the beneficial effects that:
therefore, in the present invention, the focus points causing different positive aberrations in the annular region are used to achieve myopia control and avoid the ghost phenomenon caused by excessive peripheral defocus.
Drawings
FIG. 1 is a schematic view of a myopia control contact lens of the present invention;
FIG. 2 is a schematic diagram of a first embodiment of a second optical zone of a myopia control contact lens of the invention;
FIG. 3 is a schematic diagram of a second embodiment of a second optical zone of a myopia control contact lens of the present invention;
FIG. 4A is a schematic view of a radial portion of a mirror surface of a first defocus control zone of a myopia control contact lens of the present invention and a distribution of diopter embodiments;
FIG. 4B is a schematic view of the radial portion and diopter distribution of the mirror surface of the second defocus control area of the myopia control contact lens of the present invention;
FIG. 5A is a schematic view of an intraocular image being formed when the first defocus control zone of the myopia control contact lens of the present invention corrects myopia;
FIG. 5B is a schematic view of an intra-ocular image of a second defocus control zone of the myopia control contact lens of the present invention for correcting myopia;
FIG. 6A is a side view of a first embodiment of a myopia control contact lens of the present invention;
figure 6B is a side view of a second embodiment of the myopia control contact lens of the present invention.
Description of the reference numerals:
1-a contact lens body; 1A-a contact lens body; 1B-a contact lens body; a1, imaging; a2, imaging; a3, imaging; 10-a first optical zone; 20-a second optical zone; 21-a first peripheral defocus control zone; 22, a second peripheral defocusing control area; 23-a recessed region; 30-a third optical zone; 40-a fourth optical zone; 50-peripheral region.
Detailed Description
The embodiments of the present invention will be described in more detail with reference to the drawings and the reference numerals so that those skilled in the art can implement the embodiments after reading the description.
As used herein, the measurement D is diopter (diopter), which is a unit for measuring the power of a lens or curved mirror, and is defined as the reciprocal of the focal length (reciprocal) of a lens or optical system, in meters.
The invention relates to a myopia control contact lens, which improves the ghost phenomenon caused by out-of-focus around the wearing of the contact lens worn for controlling myopia. Referring to fig. 1, which is a schematic view of the myopia control contact lens of the present invention, the contact lens body 1 of the present invention includes a first optical zone 10, a second optical zone 20, a third optical zone 30, a fourth optical zone 40 and a peripheral zone 50 from the center to the outside.
Wherein, the first optical zone 10 is a negative power correction zone for myopia, and the negative power diopter is properly matched with the diopter to correct and compensate, so as to control the object image to correctly focus on the retina in the visual axis direction.
The diameter range of the first optical zone 10 provides pupil size under normal reading light.
The first optical zone 10 can be of spherical or aspherical optical design, with a suitable diameter range for this zone being between 2.0mm and 4.0 mm.
The second optical zone 20 is a myopia control zone, which focuses the periphery of the original myopia correction on the focus behind the retina when deviating from the optical axis, and the correction is pulled to the position on or in front of the retina, so as to achieve the function of controlling myopia by peripheral defocus.
Second optical zone 20 can be of spherical or aspherical optical design, with a suitable diameter range for this zone being between 4.5mm and 6.0 mm.
The third optical zone 30 is also a near vision correction zone, and when a person is in a darker or far-looking environment, the pupil will enlarge to absorb more light, and when the pupil is enlarged, it will cross the first optical zone 10 and the second optical zone 20 to reach the third optical zone 30, and obtain a clearer near vision correction function in this area.
The third optical zone 30 can be of spherical or aspherical optical design, with a suitable diameter range for this zone being between 5.5mm and 7.0 mm.
The fourth optical zone 40 is another myopia control zone when the pupil is enlarged, focuses the periphery of the original myopia correction on the focus behind the retina when deviating from the optical axis, and corrects the position of the original myopia correction pulled to the position on or in front of the retina, so as to achieve the function of controlling myopia by defocusing.
The fourth optical zone 40 can be of spherical or aspherical optical design, with a suitable diameter for this zone ranging from 6.5mm to 8.5mm.
The peripheral zone 50 is the area that provides for the contact lens body 1 to be fixedly positioned on the eye, and the peripheral zone 50 is suitably designed to have a diameter of 13.5mm to 14.5mm.
The first optical zone 10, the third optical zone 30 and the fourth optical zone 40 are designed in a ring shape, and theoretically, the correction or control power is the same in the same optical zone, but actually, the connection of each zone needs to be connected by a curved surface, so that the power of part of the zone is different.
Furthermore, the first optical zone 10 is a correction-compensated negative diopter; the second optical zone 20 is a positive number of diopters compared to the first optical zone 10; the refractive power of the third optical zone 30 is the same as or close to the corrective power of the first optical zone 10 and increases or decreases in the range of 1.0D; the diopter of the fourth optical zone 40 is increased in the range of +1.0D to +5.0D in the present embodiment compared with the diopter of the first optical zone 10 and the third optical zone 30, which is a positive number.
Specifically, referring to fig. 2, it can be seen that the myopia control contact lens of the present invention is further characterized in that the second optical zone 20 is designed as a spaced annular optical zone, in which a first peripheral defocus control zone 21 and a second peripheral defocus control zone 22 with different diopters are arranged in a crossed manner, the diopter of the first peripheral defocus control zone 21 is increased by +1.0D to +3.5D compared with that of the first optical zone 10, and the diopter of the second peripheral defocus control zone 22 is smaller than that of the first peripheral defocus control zone 21, so as to avoid the focus blur and ghost caused by the excessively high peripheral defocus number in the whole zone, and still maintain a sufficient peripheral defocus control myopia number area ratio, and reduce the impact of sudden power change.
In addition, as shown in fig. 2, in the first embodiment of the second optical zone 20 of the present invention, the first peripheral defocus control area 21 and the second peripheral defocus control area 22 have the same distribution area and are distributed in an intersecting ring shape, but not limited thereto, as shown in fig. 3, which is a second embodiment of the second optical zone 20 of the present invention, the distribution area of the first peripheral defocus control area 21 is similar to an ellipse, but is distributed in an intersecting ring shape with the second peripheral defocus control area 22 having a different shape. Therefore, the first peripheral defocus control area 21 and the second peripheral defocus control area 22 of the present invention are not limited to a specific shape as long as a position where defocus is imaged on or in front of the retina can be achieved.
And further, in the spaced-apart annular optical design of the second optical zone 20, the area allocation ratio of the first peripheral defocus control zone 21 and the second peripheral defocus control zone 22 can be from 1.
For convenience of description, as shown in fig. 4A and 4B, the present invention provides an embodiment in which the power distribution of the radial first optical zone 10 to fourth optical zone 40 of the contact lens is ideally plotted in the near-1.0D state, but in fact the power distribution at the junction of the zones cannot be vertical, but is a steep or steep curve. Fig. 4A is a radial and diopter distribution diagram of the lens position of the first peripheral defocus control region 21. Fig. 4B is a radial and diopter distribution diagram of the lens position where the second peripheral defocus control region 22 is located. As shown in fig. 4A, the diopter value of the first peripheral defocus control area 21 is large, and the image formation can be corrected to a high degree and pulled to the anterior retinal position. As shown in FIG. 4B, the second peripheral defocus control zone 22 can be designed to provide low-level correction of the image drawn to the retinal or pre-retinal location in order to reduce the rapid change in the degree of myopia correction and control when the pupil crosses over the three zones.
Fig. 5A-5B are schematic views illustrating the operation of the second optical zone 20 according to the present invention. As shown in FIG. 5A, light enters through the first optical zone 10 in the central area, so that the central area will be imaged on the retina or near the front of the retina, and the peripheral part of the light enters the inner part of the eyeball through the first peripheral defocus control zone 21 and is imaged at the front of the retina, thereby achieving the purpose of correcting myopia by defocus. As shown in fig. 5B, the peripheral part of the light rays entering the inside of the eyeball through the second peripheral defocus control area 22 will have the peripheral imaging focal point located at a position closer to the front of the retina than the first peripheral defocus control area 21 or on the retina, and thus the overlapping of the images caused by the excessive difference between the peripheral defocus and the myopic correction power can be reduced by arranging the first peripheral defocus control area 21 and the second peripheral defocus control area 22 in a crossing manner in the ring.
As shown in FIG. 6A, which is a side view of the first embodiment of the myopia control contact lens of the present invention, in this embodiment the first peripheral defocus control zone 21 of the second optical zone 20 is a concave-back curve formed in the contact lens body 1A. As shown in FIG. 6B, which is a side view of a second embodiment of the myopia control contact lens of the present invention, in this embodiment, the first peripheral defocus control zone 21 of the second optical zone 20 is in the anterior convex curve of the contact lens body 1B. If the optical curvature is different when the optical curvature is applied to the posterior concave cambered surface, the second optical area 20 is designed in an interval type annular manner, so that the posterior concave cambered surface forms a concave area with the thickness of about 0.1-1 μm at the position of the first peripheral defocus control area 21, and the micro concave area can increase the storage of tears when a user wears the optical curvature-adjustable back lens, thereby reducing the dry and astringent feeling which is most likely to be generated by the wearer, prolonging the wearing time and increasing the myopia control effect.
The myopia control contact lens has the advantages that the annular whole circle optical design of the second optical area is improved into a spaced annular optical design, and the first peripheral defocusing control area and the second peripheral defocusing control area are arranged in a crossed mode, so that the impact of sudden degree change is reduced, a user can adapt easily, and continuous wearing will be generated.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A myopia control contact lens, comprising in order from center to outside:
the first optical area is a myopic negative power correcting area, and the diopter of the negative power is corrected and compensated according to the diopter;
the second optical area is a near vision control area, is designed in an interval type annular optical mode, and is formed by arranging a first peripheral defocus control area and a second peripheral defocus control area which are different in diopter in a crossed mode to form an annular shape, and the second optical area is positive diopter compared with the first optical area;
a third optical zone, wherein the third optical zone is a myopic correction zone and has the same or close diopter to the first optical zone;
a fourth optical zone that is another myopia control zone and that is a positive number of diopters compared to the first and third optical zones; and
a peripheral zone for providing fixed positioning of the contact lens on the eye.
2. A myopia control contact lens according to claim 1, wherein the diopter of the first peripheral defocus control zone is increased by +1.0 diopter to +3.5 diopters compared to the first optical zone, and the diopter of the second peripheral defocus control zone is smaller than that of the first peripheral defocus control zone.
3. A myopia control contact lens according to claim 1, wherein the third optical zone has a range of dioptres within ± 1.0D of the first optical zone.
4. The myopia control contact lens of claim 1, wherein the diopter of the fourth optical zone is increased by +1.0 diopters to +5.0 diopters compared to the first and third optical zones.
5. A myopia control contact lens according to claim 1, wherein the first optical zone has a diameter in the range of 2.0mm to 4.0mm; the diameter of the second optical area ranges from 4.5mm to 6.0mm; the diameter of the third optical zone ranges from 5.5mm to 7.0mm; the diameter of the fourth optical zone ranges from 6.5mm to 8.5mm.
6. A myopia control contact lens according to claim 1, wherein the surface-to-volume ratio of the first peripheral defocus control zone and the second peripheral defocus control zone in the second optical zone is from 1.
7. A myopia control contact lens according to claim 6, wherein the area distribution ratio is preferably from 7 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110435600.0A CN115236877A (en) | 2021-04-22 | 2021-04-22 | Myopia control contact lens |
| JP2021214462A JP2022167769A (en) | 2021-04-22 | 2021-12-28 | Contact lens for myopia control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110435600.0A CN115236877A (en) | 2021-04-22 | 2021-04-22 | Myopia control contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115236877A true CN115236877A (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110435600.0A Pending CN115236877A (en) | 2021-04-22 | 2021-04-22 | Myopia control contact lens |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2022167769A (en) |
| CN (1) | CN115236877A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116400518B (en) * | 2023-03-27 | 2024-01-05 | 温州明辉视光科技有限公司 | Lens structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI493241B (en) * | 2013-05-24 | 2015-07-21 | Hiline Optical Co Ltd | Len device and visual control method |
| SG10201400920RA (en) * | 2014-03-24 | 2015-10-29 | Menicon Singapore Pte Ltd | Apparatus and methods for controlling axial growth with an ocular lens |
| US20170115509A1 (en) * | 2014-08-20 | 2017-04-27 | Johnson & Johnson Vision Care, Inc. | High plus center treatment zone lens design and method for preventing and/or slowing myopia progression |
| US10877294B2 (en) * | 2015-06-23 | 2020-12-29 | Johnson & Johnson Vision Care, Inc. | Contact lens comprising non-coaxial lenslets for preventing and/or slowing myopia progression |
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2021
- 2021-04-22 CN CN202110435600.0A patent/CN115236877A/en active Pending
- 2021-12-28 JP JP2021214462A patent/JP2022167769A/en active Pending
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| JP2022167769A (en) | 2022-11-04 |
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