Automated Near-Far Visual Testing System
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Solution Overview
Problem
Existing visual ability testing methods struggle to accurately measure the time required for subjects to shift focus between near and far visual fields due to the ability to memorize multiple indicia at a given distance and not accurately record response times.
Innovation Solution
The system employs two display devices positioned near and far from the subject, with an automated voice detection system to ensure accurate measurement of focus shift times by displaying individual indicia alternately and only progressing to the next indicia after a response is received, preventing memorization and ensuring precise timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple indicia are displayed at a given distance for reading, then the subject can commit indicia to short-term memory and quickly identify them, but the accuracy of measuring focus shift time is undermined
Solution Approach 1:
The testing system segments the visual field into distinct near and far display zones with different indicia sets. Each zone is tested independently by displaying only one indicia at a time at each distance, preventing memorization across multiple indicia while maintaining separate measurable focus shift events for near and far transitions
Solution Approach 2:
The system employs periodic alternation between displaying near indicia and far indicia in a controlled sequence. This periodic display pattern ensures that each indicia is presented for a measured duration followed by a focus shift measurement period, creating repeatable test cycles that accurately capture focus transition times without allowing short-term memory interference
2Ease of operation
If a test administrator manually records identification accuracy, then the testing process is simple to implement, but quantifiable response times are difficult to obtain
Solution Approach 1:
The system replaces manual recording mechanisms with automated electronic timing and detection systems. Sensors and microprocessors automatically record the time when indicia are displayed and when the subject provides a response, eliminating manual timing errors and providing precise quantifiable response time data while maintaining ease of operation through automated processing
Solution Approach 2:
The system implements automated feedback loops where the computer records subject responses, automatically compares them against correct answers, and provides immediate feedback. This feedback mechanism maintains testing simplicity while simultaneously capturing precise response time data for analysis, eliminating the need for complex manual recording procedures
Data Source
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AI summary
Systems and methods for automated testing and/or training of a subject's visual ability at varying distances are provided. A near display device may display visual indicia possessing characteristics. After receiving an input identifying a visual characteristic possessed by the displayed indicia, a second indicia may be displayed on a far display device. After receiving an input identifying a characteristic of the indicia displayed on the far display device, further testing may proceed alternating between the near display device and the far display device. More than two display devices may be utilized, with the display devices being located at differing distances or positions relative to a subject.