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Prescription determination

A prescription and orientation technology, applied in medical science, optometry, retinoscopy, etc., can solve disadvantages and other problems

Active Publication Date: 2019-09-17
CARL ZEISS VISION INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may be disadvantageous if previous or new subjective prescriptions are judged to be superior

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach （200）

[0160] Clause 16. A computer-implemented method (200) for determining an eyeglass prescription for an eye, the method comprising the steps of:

[0161] receiving (210) information regarding measurements indicative of refractive properties of the eye;

[0162] Wherein, the method further includes:

[0163] A mathematical representation of the wavefront aberration of the eye is determined (220) from the measurements, wherein the mathematical representation comprises a plurality of terms, wherein each term comprises a function dependent on the pupil radius, and wherein the mathematical representation Each term of is independent of the azimuth, or depends on the azimuth expressed by at least one of sin(2θ) and cos(2θ), where θ is the azimuth; and

[0164] The spectacle prescription is determined ( 230 ) based on a merit function, and wherein the merit function includes at least one term of the mathematical representation.

[0165] Clause 17. The method of Clause 16, wherein the ...

Embodiment approach （300）

[0167] Clause 19. A computer-implemented method (300) for determining an eyeglass prescription for an eye, the method comprising the steps of:

[0168] receiving (310) information about measurements indicative of refractive properties of the eye; and

[0169] A mathematical representation of the eye's wavefront aberration is determined (320) from the measurements, wherein the mathematical representation includes a plurality of polynomials, each polynomial having an azimuthal order and a radial order, wherein the mathematical representation includes a a set of polynomials (40, 42, 44, 46) of common radial order, wherein the common radial order is even and greater than two;

[0170] Wherein, the method further includes:

[0171] The spectacle prescription is determined (330) based on a figure of merit function, wherein the figure of merit function comprises at least one polynomial of the mathematical representation, and wherein the figure of merit function comprises only Polyn...

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Abstract

The current invention provides for a method (100, 200, 300) for determining an eyeglass prescription for an eye, in particular through the use of a non-transitory computer readable medium. Further, a system for determining an eyeglass prescription for an eye and a computer program product are provided.

Description

technical field [0001] The present invention provides a method for determining a spectacle prescription for an eye, inter alia by using a non-transitory computer readable medium. Additionally, a system for determining a spectacle prescription for an eye and a computer program product are provided. Background technique [0002] An ametropic human eye has a refractive error that can be described to a first approximation in terms of spherical power, cylindrical power, and axial orientation. This is based on the assumption that visual defects can be approximately corrected by lenses with simple surfaces (eg, toric and spherical). This approximation corrects for errors in refraction of rays entering the center of the pupil of the eye. [0003] Although it is customary to determine the refractive error of the human eye by relying on the patient's subjective refraction (so-called subjective refraction or manifest refraction) when multiple optotypes are presented to the patient un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/10A61B3/103G02C7/02
CPCA61B3/103A61B3/1015G02C7/027G02C2202/22G02C7/028A61B3/0025A61B3/107
Inventor R.S.斯普拉特
Owner CARL ZEISS VISION INT GMBH