HMD-Based Pupil Imaging for Objective Pupillary Reflex Assessment
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Solution Overview
Problem
Conventional pupillary response tests face limitations in creating test conditions and lack objective assessment methods to quantify results, making it difficult to provide accurate and reliable visual function assessments.
Innovation Solution
A device and method utilizing a Head-Mounted Display (HMD) to create controlled testing environments and analyze pupil images to calculate indicators for assessing pupillary reflex-related visual function, including relative afferent pupillary defect and pupillary light-near dissociation, thereby providing objective and quantifiable assessment standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional test methods are used for pupillary response testing, then the testing process is simple and easy to perform, but the assessment results lack objectivity and quantification
Solution Approach 1:
The patent introduces an HMD-based imaging system as an intermediary device between the light stimulus and the observer. The HMD captures pupil images and provides them to the assessment module, which then performs automated analysis. This intermediary system transforms the subjective visual assessment into objective quantifiable data, resolving the contradiction between assessment objectivity and system complexity.
Solution Approach 2:
The patent replaces the manual/mechanical assessment process with an automated digital imaging and analysis system. Instead of relying on human observers to visually assess pupillary responses, the system uses HMD-based imaging combined with automated image processing algorithms to measure pupil size changes, thereby achieving objective quantification while managing complexity through automation.
2Manufacturing precision
If conventional test methods are used for pupillary response testing, then the equipment requirements are minimal, but the test conditions cannot be accurately controlled
Solution Approach 1:
The HMD device serves multiple functions: it acts as a light source for stimulating the pupils, as an imaging device for capturing pupil responses, and as a display device for presenting visual stimuli. By combining these functions in a single universal device, the system achieves accurate test condition control without proportionally increasing overall system complexity.
Solution Approach 2:
The patent utilizes the HMD's ability to dynamically change light parameters (intensity, duration, positioning) to create precise test conditions. The system can control the illumination characteristics presented to each eye independently, enabling accurate reproduction of various pupillary test scenarios (direct light reflex, alternating light test, etc.) with precise parameter control.
3Loss of information
If conventional test methods are used for pupillary response testing, then the assessment process is quick and simple, but quantitative assessment results cannot be provided
Solution Approach 1:
The patent implements continuous image capture and real-time analysis of pupil responses. The HMD continuously images the pupils during the entire testing process, and the assessment module performs real-time analysis to generate quantitative results. This continuous action ensures no information is lost while maintaining efficient assessment timing, as the quantification occurs automatically during the test rather than requiring separate measurement steps.
Solution Approach 2:
The system incorporates automated feedback loops where the assessment module continuously analyzes the captured pupil images and provides real-time quantitative feedback on pupillary responses. This feedback mechanism enables immediate quantification of assessment results without requiring additional time for manual measurement or calculation, thereby preventing information loss while maintaining assessment efficiency.
Data Source
AI summary
A device for assessing visual function in relation to pupillary reflex according to one embodiment includes an HMD worn on the head of a subject to be assessed to create a testing environment, and obtaining a pupil image of the subject to be assessed in the created testing environment; and an assessment module for calculating indicators for assessing visual function in relation to pupillary reflex by analyzing the pupil image of the subject to be assessed provided by the HMD, and assessing the visual function in relation to pupillary reflex on the basis of the calculated indicators.