VR Contrast Sensitivity Testing With Adaptive 3D Gradient Patterns
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Solution Overview
Problem
Traditional methods for visual acuity assessment 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 head-mounted displays (HMDs) to create dynamic 3D virtual environments for vision testing, adjusting visual stimuli based on user head orientation, and collecting eye response data to determine astigmatism and depth perception parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional visual acuity 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 examination environment using head-mounted display technology. The HMD replicates the optometrist's examination room, visual acuity charts, and testing procedures in a virtual reality space, allowing accurate vision assessment without requiring complex physical equipment while maintaining measurement precision
Solution Approach 2:
The patent replaces traditional mechanical/optical vision testing equipment with software-based virtual reality systems. The HMD displays virtual visual stimuli and tracks user responses through software algorithms, substituting physical measurement devices with computational methods that enable dynamic parameter adjustment while maintaining or improving assessment accuracy
2Adaptability or versatility
If traditional vision testing methods are used, then the testing process is simple to implement, but the test parameters cannot be dynamically adjusted and home-based testing is not feasible
Solution Approach 1:
The patent implements dynamic parameter adjustment by allowing the virtual examination environment to adapt in real-time based on user responses. The system dynamically modifies test parameters such as visual stimulus characteristics, presentation timing, and progression sequences during the examination, enabling personalized and adaptive vision assessment that was not possible with static traditional methods
Solution Approach 2:
The patent creates a universal vision testing platform that can be deployed across multiple settings including clinical offices and home environments. The HMD-based system serves multiple functions: it performs comprehensive vision assessments, adapts to different user skill levels, provides educational feedback, and enables remote monitoring, making the system versatile enough to replace multiple specialized devices while simplifying implementation
3Measurement precision
If traditional visual acuity assessment methods are used, then the testing can be performed in any location, but comprehensive evaluations of contrast sensitivity and depth perception cannot be conducted
Solution Approach 1:
The patent transitions from two-dimensional visual acuity charts to three-dimensional virtual reality environments. The HMD creates immersive 3D spaces where visual stimuli have depth, spatial relationships, and varying contrast properties that cannot be replicated on flat surfaces. This dimensional enhancement enables precise measurement of contrast sensitivity and depth perception by presenting stimuli at different virtual distances and orientations
Data Source
AI summary
A vision test can be implemented in a virtual environment using an electronic device, such as a head-mounted display. The device can execute a visual assessment application and generate a user interface corresponding to a three-dimensional (3D) virtual environment. A plurality of visual stimuli can be displayed at a first acuity level in the 3D virtual environment and can have a plurality of first shadings. The electronic device can obtain one or more user responses and determine a first contrast perception level corresponding to the first acuity level. The electronic device can also determine a shading range for a second acuity level based on the first contrast perception level. The device can further determine a plurality of second shadings in the shading range. The plurality of visual stimuli can be displayed at a second acuity level in the 3D virtual environment with the plurality of second shadings.