Eye Movement Tracking With Alert-Point Feedback
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Solution Overview
Problem
Existing eye-tracking systems in ophthalmic surgical devices face issues with tracking accuracy and precision, leading to potential suspension of tracking or false positives when the eye moves outside the defined range, prolonging surgery time and compromising surgical outcomes.
Innovation Solution
A system comprising a camera, computer, and output device that tracks eye movement by comparing current images with a reference image, determines the eye's orientation relative to alert points within a tracking range, and outputs visual or auditory indicators to maintain accurate tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If eye-tracking systems use a defined tracking range to monitor eye movement, then tracking precision is improved, but false positives occur when the eye moves outside the range, prolonging surgery time
Solution Approach 1:
The system provides real-time feedback to the surgeon through visual indicators (e.g., color-coded zones, boundary markers) showing the eye's position relative to the tracking range. This allows the surgeon to anticipate and prevent eye movement outside the range, eliminating false positives while maintaining tracking precision throughout the procedure.
Solution Approach 2:
The system establishes alert points and visual boundaries before the eye moves outside the tracking range. By providing preliminary warning indicators when the eye approaches the range boundary, the system enables preventive action, avoiding the need to suspend tracking due to false positives while maintaining measurement precision.
2Measurement precision
If the tracking range is restricted to ensure accuracy, then measurement precision is improved, but the eye may move outside the range during surgery, causing tracking suspension and loss of time
Solution Approach 1:
Real-time visual feedback indicators continuously display the eye's position relative to tracking boundaries, enabling the surgeon to maintain the eye within the accurate tracking zone throughout surgery. This prevents tracking suspension and eliminates time loss while preserving measurement precision.
Solution Approach 2:
The system uses color-coded visual indicators (e.g., green for safe zone, yellow for approaching boundary, red for near violation) to provide intuitive real-time feedback on eye position. This allows the surgeon to quickly respond and maintain tracking accuracy without interruption, preventing both false positives and tracking suspension.
3Productivity
If real-time eye orientation feedback is provided to maintain tracking accuracy, then productivity is improved, but device complexity increases due to additional processing and output systems
Solution Approach 1:
The output device serves multiple functions: it displays real-time eye position feedback, provides visual warnings when approaching boundaries, and guides the surgeon to maintain tracking accuracy. By consolidating these functions into a single integrated display system, the patent achieves improved surgical efficiency without proportionally increasing device complexity.
Data Source
AI summary
In certain embodiments, a system for tracking movement of an eye comprises a camera system, a computer system, and an output device. The camera system generates images of the eye. The computer system stores the images and at least one of the images as a reference image. The computer system also tracks movement of the eye within a tracking range by comparing a current image with the reference image, and by determining a movement of the eye from the comparison of the current image and the reference image. The tracking range has one or more alert points. The computer system also determines an orientation of the eye relative to at least one alert point of the tracking range. The output device outputs a range indicator that indicates the orientation of the eye relative to the at least one alert point of the tracking range.