Gaze-Based Cognitive Dysfunction Evaluation Device
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Solution Overview
Problem
Existing methods for evaluating cognitive dysfunction and brain dysfunction, such as dementia with Lewy bodies, are subjective and lack objectivity, making accurate assessments difficult.
Innovation Solution
An evaluation device and method that includes a display unit, a point-of-gaze detector, a display controller, an area setting unit, a determination unit, and an evaluation unit, which display images with target and induction areas to detect and analyze a subject's point of gaze, calculating evaluation data based on gaze patterns to assess cognitive dysfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a subjective questionnaire method is used to evaluate cognitive dysfunction, then the evaluation can be performed with simple equipment, but the objectivity and accuracy of the evaluation deteriorates
Solution Approach 1:
The patent replaces the mechanical/questionnaire-based evaluation system with an optical detection system. Specifically, it uses an imaging device to capture eye movement images and a point-of-gaze detector to track fixation points, substituting subjective self-reporting with objective optical measurement of actual visual attention patterns during image viewing.
Solution Approach 2:
The patent introduces an intermediary measurement system between the subject and the evaluation outcome. Instead of directly asking subjects about their cognitive status, the system uses eye tracking technology as an intermediary to objectively measure visual attention patterns, which then serve as indicators of cognitive function and hallucination susceptibility.
2Measurement precision
If eye movement tracking is implemented to objectively measure gaze patterns, then evaluation accuracy improves, but device complexity increases
Solution Approach 1:
The patent makes the display device multi-functional by integrating eye movement tracking capabilities into it. The display device not only presents visual stimuli but also functions as an imaging device to capture eye movements, eliminating the need for separate specialized eye-tracking equipment and reducing overall system complexity.
Solution Approach 2:
The patent merges the display function and the imaging function into a single integrated system. The display device that shows images to the subject also captures the eye movement images, combining two previously separate functions into one unified device, thereby simplifying the overall equipment configuration.
Data Source
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AI summary
An evaluation device includes a display unit; a point-of-gaze detector configured to detect a position of a point of gaze of a subject on the display unit; a display controller configured to display, on the display unit, an image containing a target area serving as a target that a subject is caused to gaze at and containing, in a position different from that of the target area, an induction area for inducing a visual hallucination in the subject; an area setting unit configured to set a specific area corresponding to the induction area in the display unit; a determination unit configured to, based on position data on the point of gaze, determine whether the point of gaze is present in the specific area; a computing unit configured to, based on a determination result of the determination unit, calculate point-of-gaze data; and an evaluation unit configured to, based on the point-of-gaze data, calculate evaluation data on the subject.