CN115167006A - Optical lens for slowing, delaying or preventing myopia - Google Patents

Abstract

The invention discloses an optical lens for slowing, postponing or preventing myopia, which comprises an ophthalmic lens body; the ophthalmic lens body extends from the center to the periphery in sequence and comprises a negative focal power stable light area, a first defocusing gradient, a second defocusing gradient and a third defocusing gradient. The center of the ophthalmic lens body is provided with a negative power stable optical zone that provides foveal vision correction for myopia. When the negative power stable light region extends to the left or right and above the peripheral region, the negative power decreases at a smooth rate. The invention has the effect of slowing, delaying or preventing myopia.

Description

An optical lens to slow, delay or prevent myopia

technical field

The present invention relates to the field of eyeglasses, in particular to an optical lens for slowing down, delaying or preventing myopia.

Background technique

The so-called axial growth is that when hyperopic defocus occurs in the periphery of the retina, it will lead to the deepening of myopia; on the contrary, reducing the hyperopic defocus signal in the peripheral retina will help to delay or slow down the deepening of vision. Subsequently, the emergence of peripheral defocus lenses, this theory is a possible cause of myopia proposed by Professor Smith from the School of Optometry of the University of Houston. Later, according to this theory, many companies designed so-called defocus lenses, which solved the problem of retinal imaging myopia defocusing and slowing down the length of the eye axis, which can delay the development of axial myopia. However, it is worth noting that this lens is only suitable for adolescents under the age of 18, and more post-clinical research is needed to know whether it has a preventive effect on people with deepening myopia. Now, the single-focus optical lenses on the market have the same center and edge power. In actual use, when the edge light enters the eye, it will be concentrated on the focal plane of the lens, that is, the back of the peripheral retina forms hyperopia and defocus, which generates a myopia acceleration signal, that is, the user's myopia is accelerated.

SUMMARY OF THE INVENTION

In view of the above problems, the object of the present invention is to provide an optical lens for slowing down, delaying or preventing myopia.

To achieve the above object, the present invention provides an optical lens for slowing down, delaying or preventing myopia, which includes an ophthalmic lens body. The ophthalmic lens body sequentially extends from the center to the periphery and includes a stable light region of negative power, a first defocus gradient, a second defocus gradient, and a third defocus gradient. The center of the ophthalmic lens body is provided with a stabilized light zone with negative power that provides foveal vision correction for myopia. Negative power is reduced at a steady rate as the Negative Power Stabilizing Light Zone expands to the left or right and up to the peripheral area.

In some embodiments, the lateral length of the negative power stabilization zone is 8-10 mm.

In some embodiments, the negative power stable light area includes a central light area, and a lower light area provided on the outer edge of the central light area. Therefore, there is no defocus area under the ophthalmic lens body, and the lower light area and the central light area are connected to provide a stable and clear vision area. When the central light passes through the optical center area of the lens, it will be accurately focused on the macular area of the retina, resulting in a clear image signal.

In some embodiments, the edge of the stable light area of negative power is 5mm away from the center, starting from left or right and above, and the first defocus gradient, the second defocus gradient and the third defocus gradient are decreased by a gradient of every 5mm. The defocus gradients are all 0.75D or 1.00D or 1.25D.

In some embodiments, the centrally stabilized negative power light area loops back about 270-290 degrees in three directions from the left or right and the top and decreases outward, and the center stabilized negative power light area extends downward, and is The continuation of the stable negative power light area, in the shape of a fan, the center angle is 70-90 degrees, it belongs to the reading or walking area, and the degree remains unchanged.

In some embodiments, the first defocus gradient is a model of 025; it starts to move laterally out of the optical center by 5mm, and every 5mm of movement produces a defocus amount of 0.25D, and the optical center moves laterally out by 20mm, and is moved out by the optical center. The center starts to calculate the radius of 20mm, and the maximum defocus amount is 0.75D.

In some embodiments, the second defocus gradient is a model of 050; starting from 5mm outside the optical center and moving laterally outward, every 5mm of movement produces a defocus amount of 0.50D, moving laterally from the optical center 20mm, and by the optical center The center starts to calculate the radius of 20mm, and the maximum defocus amount is 1.50D.

In some embodiments, the third defocus gradient is a model of 075; it starts to move laterally outward from the optical center 5mm, and every 5mm of movement produces a defocus amount of 0.75D, and the optical center moves laterally outward by 20mm, and The center starts to calculate the radius of 20mm, and the maximum defocus amount is 2.25D.

In some embodiments, the ophthalmic lens body is a concave lens. Thus, the lens is an optical lens for delaying or preventing myopia.

In some embodiments, the central thickness of the concave lens is between 1.1-2.5 mm.

The beneficial effect of the present invention is to slow down, delay or prevent myopia. Since the central optical zone extends to the periphery, the degree of myopia decreases steadily and slowly, reaching the central optical focus, and the periphery reduces the effect of hyperopia and defocusing. When the ambient light enters the eye and is projected to the edge of the retina, the peripheral hyperopia and defocus are greatly reduced, and the acceleration signal of myopia is weakened. When the peripheral light enters the eye through the defocusing zone at the edge of the lens (the degree is shallower than the central optical zone), compared with ordinary single vision lenses, the focusing position of the light will be further forward, closer to the retina, and the case of hyperopia and defocusing will be reduced. The peripheral retina has less hyperopic and defocus signals, which helps to weaken the eyeball growth signal sent to the brain, thereby achieving the effect of slowing down the growth of the eyeball. In this way, the effect of slowing down, delaying or preventing myopia is achieved.

Description of drawings

Fig. 1 is the structural representation that the degree of myopia of the present invention decreases steadily and slowly;

Fig. 2 is the structural representation of the present invention;

Fig. 3 is the structural representation of application of the present invention;

FIG. 4 is a schematic structural diagram of the present invention in FIG. 1 using the continuation of the stable negative optical power light region to form a central angle of 70-90 degrees.

Detailed ways

The invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 2-4, an optical lens for slowing, delaying or preventing myopia includes an ophthalmic lens body. The ophthalmic lens body sequentially extends from the center to the periphery and includes a stable light region of negative power, a first defocus gradient, a second defocus gradient, and a third defocus gradient. The center of the ophthalmic lens body is provided with a stabilized light zone with negative power that provides foveal vision correction for myopia. Negative power is reduced at a steady rate as the Negative Power Stabilizing Light Zone expands to the left or right and up to the peripheral area.

The lateral length of the negative power stable light zone is 8-10mm. The stable light area with negative refractive power includes a central light area and a lower light area provided on the outer edge of the central light area. Therefore, there is no defocus area under the ophthalmic lens body, and the lower light area and the central light area are connected to provide a stable and clear vision area. When the central light passes through the optical center area of the lens, it will be accurately focused on the macular area of the retina, resulting in a clear image signal. The edge of the negative power stable light area is 5mm away from the center, starting from the left or right and above, and every 5mm is a gradient. The decreasing distance is the first defocus gradient, the second defocus gradient and the third defocus gradient are all 0.75 D or 1.00D or 1.25D. The central stable negative power light area loops back about 270-290 degrees from the left or right and the upper three directions and decreases outward. The continuation of the area is fan-shaped, with a central angle of 70-90 degrees. It belongs to the area for reading or walking, and the degree remains unchanged.

The model with the first defocus gradient is 025; it starts to move laterally outward from the optical center 5mm, and every 5mm of movement generates a defocus amount of 0.25D, and the optical center moves laterally outward by 20mm, and starts from the optical center to calculate the radius of 20mm, The maximum defocus amount is 0.75D. The model with the second defocus gradient of 050; it starts to move laterally outward from the optical center 5mm, and every 5mm of movement produces a defocus amount of 0.50D, and the optical center is moved laterally outward by 20mm, and the radius is 20mm from the optical center. The maximum defocus amount is 1.50D. The third defocus gradient is 075 model; it starts to move laterally outward from the optical center 5mm, and every 5mm of movement produces a defocus amount of 0.75D, and the optical center moves laterally outward by 20mm, and the radius is 20mm from the optical center. The maximum defocus amount is 2.25D.

The ophthalmic lens body is a concave lens. The central thickness of the concave lens is between 1.1-2.5mm.

During application, the central optical zone extends to the periphery, and the degree of myopia decreases steadily and slowly (as shown in Figure 1) to achieve the central optical focus, and the periphery reduces the effect of hyperopia and defocus. When the ambient light enters the eye and is projected to the edge of the retina, the peripheral hyperopia and defocus are greatly reduced, and the acceleration signal of myopia is weakened. When the peripheral light enters the eye through the defocusing zone at the edge of the lens (the degree is shallower than the central optical zone), compared with ordinary single vision lenses, the focusing position of the light will be further forward, closer to the retina, and the case of hyperopia and defocusing will be reduced. The peripheral retina has less hyperopic and defocus signals, which helps to weaken the eyeball growth signal sent to the brain, thereby achieving the effect of slowing down the growth of the eyeball. In this way, the effect of slowing down, delaying or preventing myopia is achieved.

The foregoing are merely some of the embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the invention.

Claims (10)

1. An optical lens for slowing, retarding or preventing myopia comprising an ophthalmic lens body; the ophthalmic lens body sequentially extends from the center to the periphery and comprises a negative focal power stable light area, a first defocusing gradient, a second defocusing gradient and a third defocusing gradient;

the center of the ophthalmic lens body is provided with a negative focal power stable light area which provides retina fovea vision correction aiming at myopia;

when the negative focal power stable light area extends to the peripheral area leftwards or rightwards and upwards, the negative focal power is reduced at a stable rate.

2. An optical lens for slowing, retarding or preventing myopia according to claim 1 wherein the transverse extent of the zone of negative power stability is 8-10mm.

3. An optical lens element according to claim 2, wherein the zone of negative power stability comprises a central zone and a lower zone located along the periphery of the central zone.

4. An optical lens for slowing, delaying or preventing myopia according to claim 1, wherein the edge of the negative power stable light area is gradually decreased from 5mm to the left or right and above the center by every 5mm, and the first through-focus gradient, the second through-focus gradient and the third through-focus gradient are all 0.75D or 1.00D or 1.25D.

5. An optical lens for slowing, delaying or preventing myopia according to claim 4, wherein the central stable negative power light area loops back about 270-290 degrees in all left or right and up directions and decreases outwards, extends downwards from the central stable negative power light area, is a continuation of the stable negative power light area, is in a fan shape, has a central included angle of 70-90 degrees, belongs to a reading or walking use area, and keeps the degree constant.

6. An optical lens according to claim 4, wherein the first through focus gradient is of the order 025; moving laterally outward from 5mm outside the optical center produces a defocus amount of 0.25D per 5mm of movement, moving laterally outward from the optical center by 20mm, and calculating a radius of 20mm from the optical center up to a defocus amount of 0.75D.

7. An optical lens according to claim 4, wherein the second through focus gradient is 050 gauge; moving laterally outward from 5mm outside the optical center, every 5mm of movement, produces a defocus amount of 0.50D, moving laterally outward from the optical center by 20mm, and calculating a radius of 20mm from the optical center, up to a defocus amount of 1.50D.

8. An optical lens according to claim 4, wherein the third through focus gradient is of a type 075; moving laterally outward from 5mm outside the optical center, every 5mm of movement, produces a defocus amount of 0.75D, moving laterally outward from the optical center by 20mm, and calculating a radius of 20mm from the optical center, up to 2.25D defocus.

9. An optical lens for slowing, retarding or preventing myopia according to claim 1 wherein the ophthalmic lens body is a concave lens.

10. An optical lens element according to claim 9, wherein the concave lens element has a central thickness of between 1.1 and 2.5 mm.

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