Vision Aid Correction Method for Individual Physiology
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Solution Overview
Problem
Existing methods for determining spectacle lens properties do not account for individual physiology, leading to suboptimal visual comfort as they fail to match the desired quality of vision under different conditions such as daylight and darkness.
Innovation Solution
A method that measures wavefront errors and subjective refraction under different conditions, optimizing lower-order wavefront errors to ensure consistent visual comfort by matching visual impressions in both light and dark environments, thereby accounting for individual physiology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mathematical/optical methods are used to determine spectacle lens properties, then calculation precision is improved, but visual comfort deteriorates due to ignoring individual physiology
Solution Approach 1:
The patent changes the parameters from pure mathematical/optical calculations to include physiological parameters by measuring wavefront errors under different lighting conditions (photopic and scotopic). This allows the lens design to account for individual physiological differences while maintaining calculation precision, thereby improving visual comfort without sacrificing measurement accuracy.
2Ease of operation
If wavefront errors are measured under multiple conditions, then visual comfort is improved, but measurement time increases
Solution Approach 1:
The patent performs preliminary measurements of wavefront errors under both photopic and scotopic conditions during the initial examination. By capturing physiological data under different lighting conditions in advance, the system can optimize lens design to match individual physiological responses, improving visual comfort across various environments without requiring repeated measurements later.
3Ease of operation
If individual physiological measurements are performed, then visual comfort is improved, but device complexity increases
Solution Approach 1:
The patent employs a wavefront sensor that serves multiple functions: it measures wavefront errors under photopic conditions, then under scotopic conditions, and provides data for optimizing lens design. This multi-functional device captures physiological variations across different lighting conditions without requiring separate specialized equipment for each measurement type, thereby managing device complexity while improving visual comfort.
Data Source
AI summary
The invention relates to a method for determining correction characteristics for a vision aid for at least one eye of a person. In order to achieve an individual optimum of vision comfort for the person, the individual physiology of the person is taken into account in the processing of the retina image, in which: in a first step, a vision impression of the person is determined in a first usage condition, in particular by means of a wavefront error measurement and/or a measurement of subjective refraction, after which, in a second step, a vision impression of the person is determined in a second usage condition, in particular by means of a wavefront error measurement, and after which, in a third step, the wavefront of the person is optimized by determining the correction characteristics for the vision aid until the vision impression of the person in the second usage condition at least approximately matches the vision impression of the person in the first usage condition.