Smartphone Visual Acuity Assessment System with Dynamic Distance Scaling
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Solution Overview
Problem
Traditional visual assessment systems face challenges in accommodating varying test distances, often requiring manual adjustments and multiple tests to assess visual acuity at different distances, which can be impractical in professional settings and inefficient for monitoring changes in visual performance over time.
Innovation Solution
An automated visual performance assessment system using a smartphone or similar electronic device that dynamically measures test distances and adjusts display object sizes in real-time, allowing for flexible testing protocols and comprehensive data analysis across various distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standardized eye charts are used at predetermined distances, then testing protocols can be followed, but the system lacks flexibility to accommodate varying test distances in different professional settings
Solution Approach 1:
The patent replaces manual distance measurement and calculation methods with automated electronic distance measurement using the device's camera and image processing algorithms. The system automatically calculates the distance between the device and the eye chart, eliminating the need for manual measurement tools and complex calculation procedures.
Solution Approach 2:
The system dynamically adjusts the size of displayed test objects based on the measured distance parameter. As the distance changes, the system automatically scales the objects to maintain appropriate visual acuity testing conditions, enabling flexible testing at various distances without requiring multiple physical charts.
2Measurement precision
If multiple eye charts with different object sizes are used to test at different distances, then accurate visual acuity assessment can be achieved, but the testing process becomes time-consuming and inefficient
Solution Approach 1:
The system transitions from static eye charts with fixed object sizes to a dynamic display system that automatically adjusts object sizes in real-time based on the measured distance. This allows a single chart to serve multiple testing distances, significantly reducing the time required to conduct comprehensive visual acuity assessments.
Solution Approach 2:
The patent creates a universal testing system where a single eye chart can be used for testing at multiple distances. The system displays different sized objects from the same chart based on the measured distance, eliminating the need for multiple specialized charts and improving testing efficiency.
3Loss of information
If manual recording and analysis of test results are performed, then comprehensive data can be collected, but the process is labor-intensive and prone to human error
Solution Approach 1:
The system automatically performs data recording, analysis, and interpretation without requiring manual intervention. The device captures the subject's responses, automatically analyzes the results against normative data, and generates comprehensive reports, reducing human error and improving operational ease.
Solution Approach 2:
The system implements automated feedback mechanisms where test results are immediately analyzed and presented to both the administrator and subject. The system provides real-time feedback on visual acuity levels and compares results against established norms, eliminating the need for manual data interpretation.
Data Source
AI summary
An automated visual performance assessment system and method includes a Smart Phone or similar device having a display to facilitate the presentation of objects for vision performance assessment conducted at a variety of distances between the cell phone and the subject as measured by the device. The device obtains measurement of the distance from the device to the subject under test and adjusts the sizing of objects to be displayed on the display based on the protocol being implemented for the test and assessment. The objects to be displayed will be selected and size modified to present the displayed object of appropriate size for the measured distance.