Gaze Point Detection for Visual Field Evaluation
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Solution Overview
Problem
Current methods for evaluating visual field deficiencies, such as those caused by glaucoma, are inadequate in determining recognition of indicators with peripheral vision, leading to inaccurate assessments.
Innovation Solution
An evaluation device and method that uses a display screen to show a first indicator, detects the gaze point, sets a specific area, and displays a second indicator at a different position only when the gaze point is within the specific area, allowing for accurate evaluation of visual function by determining recognition of the second indicator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an indicator is presented continuously without gaze detection, then the evaluation process is simple, but it is impossible to determine whether the examinee can recognize the indicator with peripheral vision
Solution Approach 1:
A gaze point detection unit is introduced as an intermediary component to detect the examinee's gaze position on the display screen. This mediator enables the system to determine when the examinee is looking at a specific indicator, allowing peripheral vision assessment without requiring complex manual observation or additional equipment
Solution Approach 2:
The system implements feedback by detecting the gaze point position and using this information to control the display timing of indicators. When the gaze point is detected within a specific area, the system responds by presenting the indicator at that location, creating a closed-loop evaluation process that improves measurement precision
2Measurement precision
If the second indicator is displayed only when gaze point is in specific area, then peripheral vision recognition can be accurately evaluated, but the evaluation process becomes more complex
Solution Approach 1:
The system performs preliminary action by detecting the gaze point position before presenting the indicator. The specific area corresponding to each indicator position is predetermined, and the system checks whether the gaze point is within this area before displaying the indicator, ensuring that the examinee is looking at the correct location before the test stimulus is presented
Solution Approach 2:
The display timing of indicators is made dynamic based on real-time gaze point detection. Instead of presenting indicators at fixed intervals or continuously, the system adaptively controls indicator presentation based on the examinee's current gaze position, optimizing the evaluation process while maintaining high measurement precision
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
This approach enables more accurate evaluation of visual field deficiencies by ensuring the second indicator is only displayed when the examinee is gazing at the first indicator, thereby assessing peripheral vision with high certainty.
Implementation Method 1
a gaze point detection unit configured to detect a position of a gaze point of an examinee who observes the display screen
Data Source
AI summary
An evaluation device includes a display screen; a gaze point detection unit that detects a position of a gaze point of an examinee; an area setting unit that sets a specific area for a first indicator on the display screen; a determination unit that determines whether the gaze point is present in the specific area based on the position thereof; a display controller that displays a second indicator at a different position from the first indicator when determining that the gaze point is present in the specific area; a arithmetic unit that determines whether the examinee has recognized the second indicator; and an evaluation unit that evaluates a visual function of the examinee based on a determination result from the arithmetic unit. The display controller doesn't display the second indicator when determining that the gaze point isn't present in the specific area after the second indicator has been displayed.