Virtual Depth Perception Testing With Dynamic 3D Stimuli
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Solution Overview
Problem
Traditional vision assessment methods lack dynamic adjustment of test parameters and cannot be implemented for home use with household devices, leading to less accurate assessments.
Innovation Solution
Implementing methods and systems that utilize a head-mounted display (HMD) to create a 3D virtual environment for vision testing, dynamically adjusting visual stimuli based on user head orientation and obtaining eye response data to determine parameters such as astigmatism and depth perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional vision assessment methods are used, then the testing can be performed with simple equipment, but the assessment accuracy is reduced and dynamic adjustment of test parameters is not possible
Solution Approach 1:
The patent creates a virtual copy of the physical vision testing environment using a head-mounted display. The HMD renders a 3D virtual environment that replicates traditional vision test scenarios, allowing accurate vision assessment without complex physical testing equipment. The virtual environment includes virtual optotypes, targets, and testing scenarios that copy the functionality of traditional vision testing apparatus.
Solution Approach 2:
The patent implements dynamic adjustment of test parameters through real-time tracking of head orientation and position. The system continuously monitors user movement via sensors and dynamically modifies the presentation of visual stimuli, including changing target locations, adjusting visual field parameters, and adapting test difficulty based on observed head movements. This dynamic capability significantly improves measurement precision while using relatively simple hardware.
2Adaptability or versatility
If traditional vision assessment methods are used, then the testing environment is fixed and controlled, but the testing cannot be performed at home with household devices
Solution Approach 1:
The patent makes the HMD universal by designing it to perform multiple functions: it serves as both a virtual reality headset for entertainment and a medical vision assessment device. The same household device can operate in different modes, switching between virtual content consumption and clinical vision testing, eliminating the need for specialized dedicated equipment while maintaining measurement accuracy through software-based control.
Solution Approach 2:
The system incorporates real-time feedback mechanisms where sensors detect head orientation and position, and this information is fed back to dynamically adjust the visual stimulus presentation. The system monitors user responses and continuously adapts test parameters to maintain optimal assessment conditions regardless of the testing environment, enabling accurate vision testing whether performed in a clinic or at home.
3Measurement precision
If dynamic adjustment of visual stimuli based on head orientation is implemented, then the assessment accuracy is improved, but the system complexity increases
Solution Approach 1:
The patent replaces complex mechanical vision testing apparatus with an electronic/HMD-based system. Instead of using physical mechanisms to present and adjust visual stimuli, the system uses software rendering and electronic control of the HMD display. Sensors electronically track head movements and trigger programmatic adjustments of virtual stimuli, substituting mechanical complexity with software-based solutions that achieve the same measurement goals with simpler physical hardware.
Data Source
AI summary
A vision test can be performed based on real-time audio instructions in a virtual environment. An electronic device, such as a head-mounted display, can execute a visual assessment application, including generating a user interface corresponding to a three-dimensional virtual environment. The electronic device can display a plurality of visual stimuli in the user interface, and each visual stimulus can be displayed in duplication with respect to a respective target depth. The electronic device can receive one or more user responses, and each user response can indicate whether a user perceives a corresponding visual stimulus in duplication at the respective target depth. Based on the one or more user responses, the electronic device can determine a depth perception profile of the user, and the depth perception profile can include a plurality of depth perception levels corresponding to a plurality of target depths.