Intelligent Visual Function Assessment System
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Solution Overview
Problem
Current vision testing methods fail to accurately assess real-world visual function, as they typically test only one or two aspects of vision at a time and do not account for the complex interactions of visual characteristics like size, contrast, motion, and color, leading to inconsistencies between test results and actual performance abilities.
Innovation Solution
A system that uses parameter files stored on a processor to administer a sequence of visual recognition tests, allowing for real-time modification based on subject responses, and includes a calibration sensor to adjust display parameters for accurate testing, providing a comprehensive vision performance score with greater precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional vision tests (Snellen chart, LogMAR) are used to assess visual acuity, then the testing process is simple and standardized, but the assessment does not accurately reflect real-world visual function and performance
Solution Approach 1:
The patent combines multiple visual test parameters (acuity, contrast sensitivity, motion detection, color vision) into a single integrated digital testing system. The processor coordinates presentation of various visual stimuli and integrates responses to generate a comprehensive visual function profile, merging what were traditionally separate tests into one unified assessment platform.
Solution Approach 2:
The system dynamically adjusts test parameters based on subject responses in real-time. The processor modifies stimulus characteristics (size, contrast, duration, motion speed) according to performance feedback, adapting the difficulty and type of visual tasks presented. This dynamic adaptation allows the system to optimize assessment accuracy for each individual subject while maintaining engagement.
2Adaptability or versatility
If multiple individual visual tests are performed to assess different aspects of vision, then comprehensive coverage of visual parameters is achieved, but the testing time increases and the integrated assessment of real-world visual performance is still not obtained
Solution Approach 1:
The system performs preliminary assessment with a subset of visual parameters first, then uses the results to determine which additional tests are necessary. The processor analyzes initial performance data and adaptively selects subsequent test types, avoiding administration of all possible tests regardless of need. This preliminary action approach reduces overall testing time while maintaining comprehensive assessment coverage.
Solution Approach 2:
The digital display system serves multiple functions simultaneously - it can present static and dynamic visual stimuli, vary contrast levels, change colors, control motion parameters, and adjust presentation duration all through a single unified interface. This multi-functionality allows comprehensive visual assessment without requiring multiple separate physical test apparatus, thereby reducing testing time while maintaining versatility.
3Measurement precision
If driving simulators are used to assess real-world visual function, then practical visual performance is evaluated, but the testing requires complex apparatus, subjects must travel to remote locations, and the test measures coordination of visual processing and physical responses rather than pure visual function
Solution Approach 1:
The patent extracts and isolates the visual processing component from the complex motor coordination tasks required in driving simulators. By presenting visual stimuli through a display and recording only visual responses (without requiring physical driving actions), the system separates pure visual function assessment from visuo-motor coordination assessment. This extraction allows accurate measurement of visual capabilities independent of physical response requirements.
Solution Approach 2:
The system uses digital copies of real-world visual scenarios (displayed images representing traffic situations, road environments, and visual tasks) instead of requiring actual physical driving experiences. These visual copies are presented on the display device, allowing subjects to perform visual assessment tasks that mirror real-world visual demands without the complexity and logistical requirements of actual driving simulation apparatus.
4Manufacturing precision
If visual tests are tailored to specific aspects of vision (target size, contrast, depth perception), then each test can be optimized for that parameter, but a comprehensive assessment of overall visual performance cannot be obtained
Solution Approach 1:
The system dynamically transitions between different test types and parameter configurations based on subject performance and testing progress. The processor can switch from acuity testing to contrast sensitivity testing to motion detection tasks, adjusting stimulus parameters optimally for each test type while maintaining a unified testing framework. This dynamic reconfiguration allows comprehensive assessment without requiring separate fixed testing systems for each visual parameter.
Data Source
AI summary
A system and method of testing vision performance includes displaying a visual recognition test to a subject and receiving from the subject a response to the visual recognition test. After receiving the response to the visual recognition test, a subsequent visual recognition test is selected based on the response received from the subject, the subsequent visual recognition test is displayed, and a response is received from the subject. The subsequent visual recognition tests are repeated until a predetermined criterion is reached. A vision performance score is determined based on the visual recognition tests displayed and the set of responses received from the subject and output from the system.