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Myopic glasses

A technology of myopia and glasses, which is applied in the field of myopia glasses, can solve the problems of not being able to control the progress of myopia, and not reducing the defocus of paracentral hyperopia, and achieve the effect of uniform reduction of form deprivation and uniform reduction of paracentral hyperopic defocus

Active Publication Date: 2014-05-28
征平元 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the lens designs of the existing myopia glasses have the same power for the entire lens, which does not reduce the hyperopic defocus of the side center, and theoretically cannot control the progression of myopia.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 2 for figure 1 The orthographic projection view of the lens in the y-axis direction shows the relationship between the central radius of the lens and the power of addition in different numerical ranges. Point O in the figure is the projection center of the lens, and the line segments oa, ob, oc and od are respectively different center radii, where oa=4mm, ob=10mm, oc=16mm, od=22mm.

[0029] Set the degree of myopia of the myopia patient to be -4.00D. At this time, the circle with radius oa in the figure (hereinafter referred to as the first circle) has the degree (that is, the central degree) of the corresponding area on the lens as -4.00D. The circles are outward in turn, and the circle with a radius of ob (hereinafter referred to as the second circle) has a power of -3.50D on the corresponding area on the lens, that is, add 0.50D on the basis of the central power.

[0030] Sequentially, the power of the area corresponding to the circle with radius oc...

Embodiment 2

[0035] Such as image 3 , the difference between this embodiment and embodiment 1 is: in this embodiment, the myopia degree of setting myopia patient is-3.00D, the circle (hereinafter referred to as the 1st circle) that radius is oa among the figure at this moment is in the lens The power of the corresponding area on the lens (that is, the central power) is -3.00D. From the inner circle to the outside, the circle with a radius of ob (hereinafter referred to as the second circle) has a power of -2.50D in the area corresponding to the lens, that is Add light 0.50D on the basis of the central degree.

[0036] In turn, the circle with radius oc (hereinafter referred to as the third circle) has a power of -2.00D on the corresponding area on the lens, that is, add 1.00D on the basis of the central power.

[0037] Sequentially, the circle with a radius of od (hereinafter referred to as the 4th circle) has a power of -1.50D on the corresponding area on the lens, that is, adding 1.50D...

Embodiment 3

[0040] Such as Figure 4 , the difference between this embodiment and embodiment 1 is: in this embodiment, the degree of myopia of the myopia patient is set to be -2.00D, and the circle (hereinafter referred to as the first circle) with a radius of oa in the figure is on the lens The degree of the corresponding area on the lens (that is, the central degree) is -2.00D. From the inner circle to the outside, the circle with a radius of ob (hereinafter referred to as the second circle) has a degree of -1.50D in the area corresponding to the lens, that is Add light 0.50D on the basis of the central degree.

[0041] In turn, the circle with radius oc (hereinafter referred to as the third circle) has a power of -1.00D on the corresponding area of ​​the lens, that is, add 1.00D on the basis of the central power.

[0042] In turn, the power of the circle with radius od (hereinafter referred to as the 4th circle) on the lens corresponds to the degree of hyperopia - 0.50D, that is, add ...

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Abstract

The invention discloses a pair of myopic glasses. The projection area of each lens is four concentric circles, radius ranges of the circles are sequentially are 4-8mm, 10-14mm, 16-20mm and 22-26mm from inside to outside, and diopters (D) of the circles are sequentially a, a+0.50 D, a+1.00 D, a+1.50 D from inside to outside, wherein a is myopic degree. The pair of myopic glasses is suitable for glance habit of a user, covers a central visual field, has enough peripheral definition and comfort, and achieves relative unification between form sense deprivation reduction and eccentric defocus reduction.

Description

technical field [0001] The invention relates to glasses, in particular to a kind of myopia glasses. Background technique [0002] Now, juvenile myopia is getting more and more attention and attention from the society. The characteristic of juvenile myopia is that the axial length of the eye continues to grow during the process of height growth with development, and myopia is easy to deepen. There are genetic factors and environmental factors. Among environmental factors, the degree of paracentric defocus (relative to the central diopter) is considered to have a strong influence on the progression of myopia. Due to the characteristics of the shape of the eyeball, myopia is prone to paracentral hyperopic defocusing, and this defocusing form is likely to lead to a further increase in myopia, a vicious circle. To control myopia, one of the links must be broken, that is, the artificial reduction of paracentric hyperopic defocus through optical intervention. And the lens design...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/06
Inventor 王本平周行涛陈志余浩墨徐光华
Owner 征平元
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