VR Ocular Motility Assessment Using Eye Tracking
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Solution Overview
Problem
Current devices for assessing ocular motility are either too basic or overly complex, requiring lengthy explanations and are not accurate, fast, or easy to use for both examiners and subjects.
Innovation Solution
A system comprising a virtual reality headset with a calculation module that displays different images to each eye, allowing the subject to move a second element and store its location, along with the first element's location, to assess ocular motility through a series of tests, including the Bielschowsky test, using an eye tracker and providing feedback to the examiner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If basic tests are used to assess ocular motility, then the device is simple to use, but the measurement accuracy and completeness are insufficient
Solution Approach 1:
The patent uses virtual reality to create a virtual copy of the physical testing environment, allowing complete ocular motility assessment without complex physical apparatus. The virtual scene replicates all necessary test conditions while simplifying the actual device to just a headset display system.
Solution Approach 2:
The VR headset serves multiple functions simultaneously: it displays test stimuli, tracks eye movements, presents dynamic and static elements for various motility tests, and provides feedback mechanisms. This multi-functionality enables complete ocular motility assessment through a single unified device rather than multiple specialized tools.
2Measurement precision
If detailed tests are performed to detect binocular vision problems, then the assessment completeness improves, but the time required and ease of use deteriorate
Solution Approach 1:
The system continuously tracks eye movements and collects data throughout the testing process rather than using discrete, time-consuming measurement steps. The VR environment maintains continuous visual stimulation and tracking, allowing complete binocular vision assessment to be performed in a single continuous session without repeated setup or explanation cycles.
Solution Approach 2:
The VR system automatically presents test elements, tracks eye movements, and processes results without requiring examiner intervention for each measurement step. The subject simply views the virtual scene while the system autonomously performs all testing functions, eliminating time lost to examiner instructions and manual measurements.
3Ease of operation
If traditional testing methods are used, then the equipment is simple, but the subject comfort and natural head posture are compromised
Solution Approach 1:
The patent replaces traditional mechanical testing apparatus (chin rests, fixation devices, physical targets) with a virtual reality headset that uses software-generated visual stimuli. This substitution allows subjects to maintain natural head postures while undergoing complete ocular motility assessment, as the VR system adapts to the subject's positioning rather than requiring mechanical constraint.
Data Source
AI summary
A device to assess an ocular motility of a subject, the device having at least one screen configured to display a first image to a first eye of the subject and a second image to a second eye of the subject, the first image comprising a first element that is fixed and the second image comprising a second element that moves according to a movement of the subject.