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Design method of corneal contact lens

A contact lens and design method technology, applied in glasses/goggles, optics, instruments, etc., can solve the problem of high-order aberrations that cannot be compensated, and achieve the effect of delaying the growth of the eye axis and optimizing the design of local structures

Pending Publication Date: 2021-02-26
SHANGHAI MEDIWORKS PRECISION INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing corneal contact lens can only solve the basic parameters such as diopter and astigmatism, and the problem that the actual high-order aberrations in the eye cannot be compensated

Method used

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  • Design method of corneal contact lens
  • Design method of corneal contact lens
  • Design method of corneal contact lens

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] The method implementation steps are as follows:

[0032] 1. Measure the data of the corneal surface, measure and obtain the corneal topography, perform noise filtering on the three-dimensional discrete point cloud of the corneal front surface in the three-dimensional coordinate system, and perform zernike expression fitting, and record the corneal front surface along the light emitting direction as W1(r , θ);

[0033] Surface data can be obtained by corneal topography, Scheimpflug principle or OCT principle three-dimensional imaging equipment;

[0034] 2. According to the ray tracing method, calculate the corneal wavefront distribution and the corresponding wavefront aberration, and record it as Z1(r, θ) after zernike decomposition;

[0035] 3. Measure the wavefront aberration data of the whole eye. The wavefront data of the array of focused light spots in the fundus can be measured by the Hartmann–Shack wavefront aberration measuring instrument, and the wavefront aber...

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Abstract

The invention discloses a design method of a corneal contact lens, which is characterized by comprising the following steps of: measuring data of a corneal surface; calculating corneal wavefront distribution and corresponding wavefront aberration measuring full-eye wave aberration data, and reconstructing full-eye wavefront aberration; calculating intraocular aberration; constructing a three-dimensional wavefront model; selecting an optimal array combination; and designing a micro-lens structure of an area corresponding to the corneal contact lens, enabling the light wave to form a corresponding waveform in the area after passing through the orthokeratology lens and the cornea, and outputting the micro-lens structure distribution as a final result.

Description

technical field [0001] The invention relates to a method for designing a corneal contact lens, belonging to the technical field of corneal contact lenses. Background technique [0002] Contact lenses (CL) are directly attached to the tear layer of the cornea, which is physiologically compatible with the human eye and achieves the purpose of vision correction. Compared with orbital frame glasses, CL has a larger field of view, can maintain optical correction performance in all gaze directions, eliminates the prism effect of glasses, eliminates oblique astigmatism, reduces binocular retinal aberration, maintains better binocular vision, and is safe to use , convenient, beautiful, and some special lenses can meet some special requirements. Indications: Especially suitable for high myopia, corneal astigmatism, anisometropia and aphakia. [0003] The surface composed of equal phase planes when the light propagates to a certain position is called the wavefront. However, since th...

Claims

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Application Information

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IPC IPC(8): G02C7/02G02C7/04
CPCG02C7/027G02C7/028G02C7/04
Inventor 尉佩陈文光李慧杰
Owner SHANGHAI MEDIWORKS PRECISION INSTR
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