Virtual Reality Visual Disability Detection System
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Solution Overview
Problem
Current clinical methods lack objective measures to evaluate visual performance in relation to activities of daily living, particularly for patients with visual disabilities, as they primarily rely on visual acuity and visual field testing, neglecting other functional indicators like contrast sensitivity and stereopsis, and fail to quantify the impact of visual impairments on daily tasks.
Innovation Solution
A visual disability detection system utilizing virtual reality to assess visual performance by simulating daily tasks in various environments with different brightness and contrast levels, employing a head-mounted display, sensor system, and computing device to record and compute performance scores, integrating tests for visual acuity, visual field, contrast sensitivity, and stereopsis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional visual acuity and visual field testing methods are used, then the assessment process is simple and familiar to clinicians, but the measurement does not objectively quantify the impact of visual impairments on activities of daily living
Solution Approach 1:
The patent creates virtual copies of real-world environments (supermarket, street, staircase) using virtual reality technology. These virtual environments replicate the visual challenges of daily activities, allowing objective measurement of visual disability impact without requiring actual physical presence in complex real-world settings. The virtual supermarket simulation copies the visual field requirements of shopping, the street simulation copies navigation challenges, and the staircase simulation copies depth perception demands.
2Measurement precision
If multiple functional indicators (contrast sensitivity, color vision, stereopsis) are tested, then the assessment comprehensively evaluates visual performance, but the testing process becomes more complex and time-consuming
Solution Approach 1:
The patent merges multiple visual function tests into a single integrated virtual reality assessment platform. Instead of administering separate tests for visual acuity, visual field, contrast sensitivity, color vision, and stereopsis, the system combines all these measurements within unified virtual environments. For example, the supermarket simulation simultaneously assesses visual field, contrast sensitivity, and color vision while the patient performs shopping tasks, reducing total testing time while maintaining comprehensive evaluation.
Solution Approach 2:
The virtual reality platform serves multiple assessment functions simultaneously. A single virtual environment can test multiple visual parameters (visual field, contrast sensitivity, color vision) and multiple functional abilities (navigation, object recognition, depth perception) in an integrated manner. The system is designed to be universally applicable across different visual disability types and severity levels, providing a multi-functional assessment tool that replaces multiple specialized tests.
3Measurement precision
If virtual reality simulation is implemented to simulate daily activities, then objective measurement of visual disability impact is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent introduces virtual reality technology as an intermediary between traditional clinical assessment and real-world functional performance. Rather than directly observing patients in complex real-world settings or relying on subjective self-reports, the VR system creates a controlled intermediate environment that objectively measures visual performance while simulating daily activity demands. This intermediary platform provides standardized, repeatable, and objective measurements that bridge the gap between simple clinical tests and complex real-world functioning.
Data Source
AI summary
Techniques for a visual disability detection system that employs virtual reality to assess visual performance of a patient based on activities of daily living are described. The virtual reality platform can integrate the testing of different components of visual function based on activities of daily living to provide a direct and clinically relevant measure of the impact of any visual disability on a patient's daily life. By simulating daily tasks for evaluation of visual disability, clinicians can better understand from a patient's perspective how visual impairment affects their daily tasks and quality of life.