Portable Peripheral Vision Testing via Touchscreen Eye Tracking
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Solution Overview
Problem
Conventional visual field testing for peripheral vision, such as in glaucoma diagnosis, requires bulky and non-portable equipment, making it inconvenient and expensive for widespread use in value-based medicine.
Innovation Solution
Utilizing touchscreen-based devices like tablet computers with eye-tracking capabilities to conduct visual field tests by displaying still and flash elements and recording user responses, allowing for portable and cost-effective assessment of peripheral vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional perimeter equipment is used for visual field testing, then measurement precision is improved, but device complexity and portability are worsened
Solution Approach 1:
The patent creates a simplified copy of the conventional perimeter testing system using a touchscreen display and eye-tracking camera. Instead of using the full-scale perimeter machine, the invention replicates the essential testing function on a portable device, maintaining diagnostic capability while eliminating the need for bulky equipment.
Solution Approach 2:
The patent replaces the mechanical perimeter apparatus with an optical-digital system consisting of a touchscreen display and eye-tracking camera. This substitution eliminates complex mechanical components while preserving the core functionality of visual field testing through software-based stimulus presentation and response detection.
2Measurement precision
If conventional perimeter equipment is used for visual field testing, then measurement precision is improved, but ease of operation is worsened
Solution Approach 1:
The system automatically tracks eye position and determines fixation status without requiring manual adjustment or complex user interaction. The eye-tracking camera continuously monitors eye position and the system autonomously adjusts testing parameters based on detected fixation quality, making the testing process more convenient while maintaining precision.
Solution Approach 2:
The testing system dynamically adapts to the user's eye movements and fixation quality in real-time. The software adjusts stimulus presentation and response windows based on detected eye position, creating a more flexible and user-friendly testing experience compared to rigid conventional equipment.
3Reliability
If conventional perimeter equipment is used for visual field testing, then reliability is improved, but cost is worsened
Solution Approach 1:
The patent replaces expensive, durable perimeter equipment with affordable, disposable-like components such as standard touchscreen devices and consumer-grade eye-tracking cameras. This approach significantly reduces equipment cost while maintaining sufficient diagnostic reliability for detecting glaucoma and other vision conditions.
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
Enables inexpensive and convenient testing of peripheral vision, providing a reliable method for diagnosing eye and vision ailments like glaucoma using portable touchscreen devices with eye-tracking technology.
Implementation Method 1
detecting if a user's eye or eyes are fixated on the still element
Data Source
AI summary
Systems and methods according to present principles use touchscreen-based devices such as tablet computers or other computers incorporating touchscreens to both run the test and to receive input/output. It will be understood that any such device may be employed, so long as a display, means for user input, and means for eye tracking, are provided, and so long as its display screen is large enough to effectively test visual field.