Preparation method for aspherical vision correction lens with controllable peripheral defocus

Abstract

The invention relates to a preparation method for an aspherical vision correction lens with controllable peripheral defocus. The preparation method comprises the following steps: (1) through the checking of human eye retina shape or human naked eye peripheral defocusing amount or human eye glasses-wearing peripheral defocusing amount, calculating and judging the conditions needed by forming myopization defocus of the human eye; (2) according to the conditions obtained by the myopization defocus, forming a distribution solution of refractive power of the vision correction lens changed along with the pore diameter; (3) according to the distribution solution of the refractive power of the vision correction lens, making the vision correction lens, so the refractive power distribution in the peripheral area of the whole eye refractive power formed on the retina is greater than that in the center area after the refractive power of the vision correction lens is attached to the human eye, and forming the myopization defocus before falling on the retina; using an aspheric surface to control the surface shape and curvature radius of an optic zone of the vision correction lens, so that the vision correction lens is evenly changed in the aperture direction according to the stated refractive power peripheral defocusing amount, the refractive power is increased along with the increase of the aperture, so the degree-controllable myopization defocus is provided to the human eye.

Description

technical field [0001] The invention relates to a preparation method of a vision correction lens, in particular to a preparation method of an aspheric vision correction lens with controllable peripheral defocus. Background technique [0002] Defocus (Defocus, out-of-focus) is the corresponding word of focus. Defocus means that the image plane is not in focus. It is divided into two types: front defocus (before focus) and back defocus (after focus). state. [0003] The main reason for the increase in the degree of myopia is the extension of the axial length of the eye, and the degree increases by 3.00 degrees for every 1mm of extension. The latest medical research confirms that the elongation of the eyeball depends on the retina (such as figure 1 10) peripheral defocus, according to the concept of refractive optics, the focal point falls in front of the retina is called myopic defocus (such as figure 1 30 in the center), those who fall behind the retina are called hyperopi...

AI Technical Summary

Problems solved by technology

However, there are two problems in this way of realizing peripheral defocus control. First, because the lens only contains two kinds of radians, the optical imaging process is similar to a partitioned multi-focal lens, and each focal point interferes with each other, forming a halo phenomenon; second, because The radius of curvature between each arc segment is different, and the connection between the rings will cause a lot of stray light. Therefore, the biggest problem of this kind of lens is that the imaging is interfered by the multi-layer structure of the optical zone, and the visual quality is poor.

[0010] So far, the technology that uses peripheral defocus to control the growth of myopia faces two major problems. One is the lack of a clear and quantifiable implementation of peripheral defocus control; the other is the lack of effective and controllable treatment products.

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