Gaze-Based Visual Function Detection Using Eye Tracking
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Solution Overview
Problem
Conventional visual function detection methods, such as using Landolt rings, are inadequate for infants and objective determination of visual function in test subjects, as they rely on self-declaration or subjective assessment, making it difficult to accurately evaluate visual function, especially in cases where test subjects cannot express their observations.
Innovation Solution
A visual function detection apparatus comprising a display controller, a gazing point detector, a positional relation detector, and a visual function detector, which displays images on a screen, detects the test subject's gazing point, and assesses visual function based on the positional relation between the image and the gazing point, allowing for objective evaluation without relying on self-declaration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If Landolt rings are displayed on a screen for eyesight examination, then the examination can be performed using simple display equipment, but the test subject is required to self-declare how he/she sees making objective determination difficult
Solution Approach 1:
The patent introduces a gazing point detector as an intermediary device that objectively measures where the test subject is looking on the display screen. This mediator translates the test subject's visual attention into measurable data, eliminating the need for self-declaration while maintaining examination simplicity.
Solution Approach 2:
The patent replaces the subjective self-declaration mechanism with an objective gazing point detection system using eye tracking technology. This substitution transforms the examination from a subjective report-based method to an objective measurement-based method, improving measurement precision without complicating the overall system.
2Ease of operation
If the test subject is required to self-declare visual observations, then the examination method remains simple to operate, but appropriate examination cannot be performed for test subjects such as infants who cannot express their observations
Solution Approach 1:
The patent makes the examination method universal by replacing the self-declaration requirement with objective gazing point detection. This allows the same examination system to be used with any test subject regardless of age or communication ability, from infants who cannot speak to adults who can provide subjective feedback.
Solution Approach 2:
The system performs the examination automatically by detecting the test subject's gazing points and analyzing visual function without requiring the test subject to actively participate in declaring observations. The test subject simply needs to look at the display, and the system autonomously collects and analyzes the data.
3Device complexity
If subjective assessment methods are used for visual function detection, then the examination can be performed without complex detection equipment, but objective determination about whether the test subject is actually seeing the image is difficult
Solution Approach 1:
The patent replaces subjective assessment with objective gazing point detection using eye tracking technology. This substitution provides reliable, quantifiable data about where the test subject is looking and for how long, enabling objective determination of visual function without requiring complex additional equipment beyond the display and detection sensors.
Solution Approach 2:
The system provides objective feedback by measuring the actual gazing points and using this data to determine visual function. This feedback mechanism replaces subjective reporting with measurable, analyzable data that can be objectively evaluated to assess whether the test subject is actually seeing the displayed image.
Data Source
AI summary
A visual function detection apparatus includes: a display controller that causes an image for determination to be displayed on a display screen of a display unit; a gazing point detector that detects a position of a gazing point of the test subject observing the display screen; a positional relation detector that detects a positional relation between a position of the image for determination on the display screen and the position of the gazing point; and a visual function detector that detects a visual function of the test subject based on the positional relation.