VR Headset Pupil Tracking for Consistent APD Testing

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Solution Overview

Problem

Traditional afferent pupil defect (APD) tests are manually conducted by eye care professionals, leading to variable sensitivity and inconsistency in diagnosing the severity of APD due to qualitative judgments by practitioners.

Innovation Solution

A virtual reality (VR) headset-based system that automates the APD test, providing consistent and sensitive results by controlling ambient light and using infrared pupil tracking to measure pupil responses to stimuli, enabling efficient and standardized testing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual APD testing is performed by eye care professionals, then the test can be conducted in various ambient light environments, but the sensitivity and consistency of results vary due to qualitative judgments

Engineering Contradiction:

Improvesensitivity and consistency of APD test resultsVSAvoidcomplexity of testing system

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the manual mechanical testing system with an automated electronic system that uses infrared imaging and computer processing to objectively measure pupil responses, eliminating qualitative judgments while maintaining the ability to test in various ambient light conditions

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service testing where patients can undergo APD testing independently without requiring trained eye care professionals, though the patent primarily focuses on the automated measurement capability rather than patient self-administration

Inventive Principle:

Principle #25Self-service

2Productivity

If manual APD testing is performed, then the test can be adapted to different ambient light conditions, but the testing process is time-consuming and less efficient

Engineering Contradiction:

Improvetesting efficiency and time consumptionVSAvoidease of conducting the test

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The automated system continuously captures pupil responses throughout the testing process without interruption, allowing multiple measurements to be taken in rapid succession and eliminating the time-consuming nature of manual testing while maintaining ease of operation through automated control

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If automated VR headset-based testing is implemented, then sensitivity and consistency improve, but the device complexity increases

Engineering Contradiction:

Improveconsistency of test resultsVSAvoidcomplexity of testing system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent integrates multiple functions into a single system: the VR headset serves as both the testing apparatus and the imaging device, combining pupil response measurement with environmental control to improve reliability while managing device complexity through multi-functionality

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The VR headset system enhances the sensitivity and consistency of APD testing, allowing for more accurate diagnosis of health issues by eye care professionals through standardized and efficient testing in various lighting conditions.

Implementation Method 1

an infrared imaging subsystem to track pupil responses

Methodology Applied

Scientific EffectInfrared radiation detection: Infrared Radiation

Data Source

PatentUS12611100B2Afferent pupil defect testing in a VR headset

Publication Date: 2026.04.28 VERILY HEALTH INC

AI summary

Virtual reality, VR, headset-based electronic systems that can be used to perform afferent pupil defect, APD, tests. The systems may improve the sensitivity, consistency, and ease of application of the APD tests. Other aspects are also described.