Dual-Display Visual Function Measurement for Objective Accommodation Testing
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Solution Overview
Problem
Current clinical measurements of visual function are subjective, poorly reproducible, and do not account for patient adaptation, leading to invalid results and limited reproducibility due to specialist subjectivity and underestimation of influencing factors.
Innovation Solution
A system with two display units, one larger and one smaller, mounted on a movable support, allowing controlled stimulation and measurement of accommodative responses through variable 2D/3D objects, using motion and tracking sensors to analyze user interactions and responses for objective parameter assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual clinical tests and optotypes are used by a specialist, then visual function parameters can be measured, but the results are subjective, poorly reproducible, and purely qualitative
Solution Approach 1:
The patent replaces manual mechanical testing methods with an automated computer-based system that uses software to present visual stimuli and algorithms to analyze responses. The system substitutes the specialist's manual optotype presentation and interpretation with automated digital displays and computational analysis, eliminating subjectivity while maintaining measurement capability
Solution Approach 2:
The system enables self-testing capability where patients can perform visual function assessments without requiring a specialist to manually present each test element. The automated presentation of stimuli and automatic recording of responses allows the system to serve itself, reducing dependency on manual intervention while improving reproducibility
2Adaptability or versatility
If measurements are carried out independently for each visual function, then specific visual parameters can be assessed, but the results are sometimes invalid because the influence of other factors is underestimated
Solution Approach 1:
The patent creates a unified measurement system that simultaneously assesses multiple visual functions including accommodation, convergence, and other ocular parameters through integrated software modules. The system presents coordinated stimuli that engage multiple visual functions concurrently and analyzes their interactions, providing a comprehensive assessment that accounts for the influence of different factors on each other
Solution Approach 2:
The system incorporates real-time feedback mechanisms where the software monitors patient responses and automatically adjusts subsequent stimuli based on observed performance. This feedback loop allows the system to account for adaptive responses and compensatory mechanisms, improving the reliability of measurements by considering the dynamic nature of visual function interactions
3Adaptability or versatility
If a single display unit is used, then the system is simpler, but the stimulation and measurement of accommodative responses at different distances is limited
Solution Approach 1:
The patent divides the display system into multiple independent display units positioned at different distances from the patient. Each display unit can present stimuli independently, allowing the system to stimulate and measure accommodative responses at various distances simultaneously or sequentially. This segmentation enables comprehensive accommodative assessment without requiring complex mechanical adjustment mechanisms
Solution Approach 2:
The system adds the spatial dimension of display distance by positioning multiple displays at different depths relative to the patient. This dimensional expansion allows the system to present stimuli at near, intermediate, and far distances without requiring mechanical movement or adjustment, thereby increasing stimulation capability while maintaining relatively simple device architecture
Data Source
AI summary
The measurement system comprises a first display unit configured to represent a scene wherein at least one 2D/3D object has variable characteristics for instilling a visual response in the user, wherein said variable characteristics include at least the virtual position and virtual volume of the 2D/3D object within the scene; an interface configured to enable user interaction; processing means configured to analyze the user response based on the association of data from the interface with varying characteristics of the 2D/3D object represented in the display unit and estimating a plurality of clinical parameters of the user's visual function, and a second display unit also configured to represent a scene wherein the at least one 2D/3D object has variable characteristics for instilling a visual response in the user.