Smartphone Perimetry Using Camera Eye Tracking
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Solution Overview
Problem
Conventional perimetry devices are bulky, expensive, and require skilled personnel for operation, limiting their accessibility and usability for measuring the visual field.
Innovation Solution
A mobile computer device equipped with a display, processor, memory, and camera, capable of showing variable light stimuli and determining the visual field based on user responses, connected with an optional optical attachment for precise image projection, allowing for compact, inexpensive, and user-friendly perimetry measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional perimetry devices are used, then measurement precision is maintained, but device complexity and cost increase
Solution Approach 1:
The patent uses a mobile computing device (smartphone or tablet) as a simplified copy of conventional perimeter equipment. The display screen replicates the light stimulus function, the camera replicates the eye tracking and stimulus detection function, and the processor replicates the measurement control and data analysis function. This copying approach maintains measurement capability while dramatically reducing device complexity and cost.
Solution Approach 2:
The mobile computing device serves multiple functions: it displays light stimuli through its screen, tracks eye position using the camera, processes measurement data through the processor, and stores results in memory. This multi-functionality eliminates the need for separate dedicated components required by conventional perimeters, resolving the contradiction between measurement precision and device complexity.
2Measurement precision
If conventional perimetry devices are used, then measurement accuracy is ensured, but ease of operation deteriorates
Solution Approach 1:
The mobile computing device performs self-service functions: the camera automatically tracks eye position without manual adjustment, the processor automatically analyzes stimulus responses and calculates visual field parameters, and the system automatically adapts stimulus parameters based on real-time feedback. This automation maintains measurement accuracy while significantly improving ease of operation.
Solution Approach 2:
The system implements continuous feedback loops where the camera monitors eye position, the processor adjusts stimulus presentation based on detected eye movements and user responses, and the system adapts measurement parameters in real-time. This feedback mechanism ensures measurement accuracy is maintained while the automated nature of the feedback process improves ease of operation.
3Measurement precision
If conventional perimetry devices are used, then comprehensive visual field coverage is achieved, but device portability deteriorates
Solution Approach 1:
The patent merges multiple functions (display, camera, processor, memory) into a single mobile computing device that can be held in the hand. This consolidation achieves comprehensive visual field coverage through software control and image processing while maintaining extreme portability, as the entire measurement system fits in a smartphone or tablet that weighs only a fraction of conventional perimeter equipment.
Data Source
AI summary
The invention relates to mobile computer devices, front-mounted optical systems and computer program products allowing perimetry measurement.