Myopia Control Software Using Eye Movement Tracking
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Solution Overview
Problem
Current methods for determining accommodation and vergence in myopia control are standardized and do not account for individual physiological parameters, requiring subjective assessments and trained personnel, which limits their accuracy and effectiveness.
Innovation Solution
A computer program and device that jointly determine accommodation and vergence using a mobile terminal with a camera and acceleration sensor, allowing for objective assessment without the need for subjective feedback, by displaying characters at varying distances to stimulate accommodation and detect eye movements to calculate changes in refraction and vergence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If standardized methods are used for determining accommodation and vergence, then the process is simple and standardized, but individual physiological parameters are not taken into account, reducing accuracy
Solution Approach 1:
The system changes measurement parameters by displaying characters at multiple different distances (first distance, second distance, third distance) to stimulate accommodation at different levels. This allows determination of individual AC/A ratios and accommodation amplitudes, transforming standardized single-point measurements into multi-parameter assessments that capture individual physiological characteristics.
2Measurement precision
If subjective assessment methods are used, then trained personnel can obtain accommodation accuracy information, but the process requires subjective assessment and trained personnel
Solution Approach 1:
The system enables objective self-measurement by having the user simply view characters at different distances while the mobile device's camera and sensors automatically track eye movements and calculate accommodation and vergence values. This eliminates the need for subjective feedback or trained personnel interpretation, transforming a complex manual assessment into an automated objective measurement process.
Solution Approach 2:
The invention replaces the mechanical/manual system of trained personnel performing subjective assessments with an automated optical system using the mobile device's camera, LEDs, and processing algorithms. This substitutes human expertise with technological automation, maintaining measurement accuracy while eliminating the need for specialized training.
3Device complexity
If accommodation and vergence are determined separately, then the measurement process is simpler, but individual AC/A ratios and accommodation errors cannot be accurately determined
Solution Approach 1:
The system merges the determination of accommodation and vergence into a single integrated measurement process. By simultaneously tracking eye movements and analyzing accommodation responses to characters at multiple distances, the system calculates both parameters together, enabling accurate determination of individual AC/A ratios and their relationship to vergence, which cannot be achieved through separate measurements.
Data Source
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AI summary
The present invention relates to a computer program for determining values for myopia control of at least one eye (112, 112') of the user, a data processing device, and associated computer-readable data carriers, data carrier signals, and computer-readable media. The computer program comprises instructions which, when executed by a computer, cause the computer to perform a method (210) for jointly determining the accommodation and vergence of at least one eye (112, 112') of a user, which comprises the following steps: a) displaying at least one character at at least a first distance (166) in front of at least one eye (112, 112') of a user to stimulate the accommodation of the at least one eye (112, 112'); b) detecting an eye movement of the at least one eye (112, 112');and c) determining the refraction of at least one eye (112, 112') when the at least one eye (112, 112') accommodates at least one first distance (166); and d) jointly determining the accommodation and the vergence of at least one eye (112, 112') by determining a change in the refraction of at least one eye (112, 112') when the at least one eye (112, 112') accommodates at least one first distance (166) compared to the accommodation of at least one eye (112, 112') at a second distance (160); • Determining the vergence of at least one eye (112, 112') from the eye movement of at least one eye (112, 112') during accommodation of at least one eye (112, 112') at at least one first distance (166);and e) Determining a change in myopia of at least one eye (112, 112') of the user from a ratio of the vergence of at least one eye (112, 112') to the change in accommodation from the change in refraction of at least one eye (112, 112') when accommodating at least one eye (112, 112') at at least one first distance (166) versus accommodating at least one eye (112, 112') at at least the second distance (160).;