Handheld Shape Discrimination Vision Testing for Quantitative Tracking
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Solution Overview
Problem
Current vision assessment methods, such as the Amsler grid test, are subjective and lack quantification, making it difficult for individuals to accurately monitor and track serious vision disorders like diabetic retinopathy and macular degeneration without professional equipment.
Innovation Solution
A handheld vision tester with a touchscreen that presents modulated shapes for self-testing, allowing users to input responses, which are then stored and transmitted to healthcare providers for objective assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If professional evaluation equipment and trained technicians are used, then measurement precision and reliability are improved, but device complexity and cost increase
Solution Approach 1:
The patent creates a simplified copy of professional vision assessment capabilities using a handheld device with touchscreen display. Instead of requiring complex professional equipment, the system reproduces essential vision testing functions through software-based shape presentation and automated response analysis, making professional-grade assessment accessible through consumer technology
Solution Approach 2:
The system enables patients to perform vision assessments independently without requiring trained technicians. The handheld device guides users through shape discrimination tests, automatically records responses, and generates results that can be reviewed by healthcare providers, transferring the assessment function from professional operator to patient self-service
2Device complexity
If subjective self-assessment methods like Amsler grid are used, then device complexity is reduced, but measurement precision and objectivity deteriorate
Solution Approach 1:
The system incorporates automated feedback mechanisms where the handheld device immediately processes user responses to shape discrimination tests and provides objective results. The touchscreen captures precise response data, which is automatically analyzed against established criteria to determine vision status, eliminating the subjective interpretation required by traditional grid methods
Solution Approach 2:
The patent transforms the vision assessment from subjective qualitative observation to objective quantitative measurement by changing the test parameters. Instead of asking patients to subjectively evaluate grid distortion, the system presents controlled shape variations and measures the user's ability to discriminate between them, providing quantifiable data about visual function
3Measurement precision
If quantitative tracking of vision disorders is implemented, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The system copies the complex data collection and analysis functions of professional vision tracking into a simplified handheld interface. The device automatically performs the quantitative measurements and computational analysis that would otherwise require sophisticated equipment, presenting the results in an easily interpretable format for patients
Data Source
AI summary
In an embodiment of the disclosure, there is provided a handheld vision tester for vision self-testing by a user. The handheld vision tester comprises a touchscreen display, a control, and an interface port. The touchscreen display is configured to present different shapes, either statically or dynamically, to the user for the vision self-testing. One of the different shapes may be a modulated version of another similar shape displayed at the same time and includes a modulated edge. The control is configured to allow a user to trigger operations of the tester and allow the user to select one of the different shapes. The handheld vision tester is configured to determine results of the vision self-testing from the user selections and store the results in the handheld vision tester. The interface port is configured to transmit the stored results to a healthcare provider who uses the results to enhance treatment routines.