Vision Testing System Using Motion Sensing for Dynamic Acuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tests for measuring dynamic visual acuity and gaze stabilization require precise measurement and maintenance of the distance between the subject and the display screen, which is inconvenient and impractical, especially in portable or dynamic testing environments, and do not account for subjects with disorders who may fatigue easily.
Innovation Solution
A system and method that uses a visual display device and data processing device to test dynamic visual acuity and gaze stabilization by displaying visual objects of varying sizes and velocities without requiring exact distance measurement, allowing for accurate assessment regardless of the subject's position relative to the screen, and includes a motion sensing device to measure head velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between the subject and display screen is precisely measured and maintained, then the accuracy of dynamic visual acuity and gaze stabilization testing is improved, but the convenience and portability of the testing system deteriorates
Solution Approach 1:
The patent replaces the mechanical measurement system (physical distance measurement tools and fixed positioning) with a computational approach. The system uses a motion sensing device to detect head position and velocity, then computationally adjusts visual object parameters (size, velocity, position) to compensate for distance variations. This substitution eliminates the need for precise physical distance measurement while maintaining testing accuracy.
Solution Approach 2:
The system dynamically changes multiple parameters based on detected head position: visual object size is adjusted to maintain optimal visual angle, visual object velocity is modified to account for relative motion, and visual object position is repositioned to track with head movement. These parameter changes allow accurate testing across a range of distances without requiring fixed positioning.
2Measurement precision
If the distance between subject and display screen is precisely measured and maintained, then the accuracy of test results is improved, but the time required for setup and testing increases
Solution Approach 1:
The system performs preliminary calibration by having the subject wear the motion sensing device and establish a baseline head position. This preliminary action captures the subject's anatomical reference points, allowing the system to compute optimal visual object parameters for any subsequent head position without requiring time-consuming distance measurements during each test session.
Solution Approach 2:
The computational real-time adjustment of visual object parameters based on motion sensing data eliminates the need for repeated physical distance measurements and manual repositioning, significantly reducing setup time while maintaining accuracy across different testing locations and subjects.
3Adaptability or versatility
If the testing system is made portable and movable to different locations, then the adaptability and accessibility of the system is improved, but the ability to maintain constant distance between subject and display screen deteriorates
Solution Approach 1:
The system transitions from a static testing arrangement (fixed distance) to a dynamic system that continuously adapts to changing conditions. The motion sensing device tracks head position in real-time, and the visual object parameters are dynamically adjusted based on detected movement, allowing accurate testing regardless of location or distance variations.
Solution Approach 2:
The system becomes universal by eliminating dependence on fixed installation conditions. The motion-sensing-guided parameter adjustment mechanism allows the same portable system to deliver accurate results across diverse testing environments, different subjects, and varying distances, making the system adaptable to virtually any location without sacrificing measurement consistency.
Data Source
AI summary
A system for testing the vision of a subject and/or training head-eye coordination associated with the vision of a subject is disclosed herein. The system includes a visual display device having an output screen, the visual display device configured to display one or more visual objects on the output screen so that the one or more visual objects are visible to the subject; and a data processing device, the data processing device operatively coupled to the visual display device, the data processing device being specially programmed to carry out the steps of the vision tests and training procedures. In one or more embodiments, the system may further include a motion sensing device, the motion sensing device configured to measure a velocity or speed of a head of a subject, and the motion sensing device being operatively coupled to the data processing device.