Ophthalmologic Imaging Area Tracking for Eye Movement
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Solution Overview
Problem
Ophthalmologic photographing apparatuses face challenges in maintaining image quality due to eye movement during imaging, especially when the imaging area exceeds the predetermined range, leading to reduced image quality and difficulties in capturing consistent cross-sectional images for follow-up examinations.
Innovation Solution
The apparatus includes a detection unit for eye movement, a selection unit for imaging modes, and a tracking control unit that adjusts tracking based on the detected information, allowing for flexible imaging area settings to maintain image quality by varying the measurement area specifiable range and using a fixation lamp to guide the eye's fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the imaging area is extended to capture broader eye regions, then the coverage of the eye surface is improved, but the image quality deteriorates when the imaging area exceeds the predetermined range
Solution Approach 1:
The patent implements dynamic adjustment of the imaging area based on real-time eye movement detection. The tracking control unit continuously monitors eye position and adjusts the imaging area accordingly, allowing the system to adapt between extended coverage mode (when eye is stable) and quality preservation mode (when eye moves beyond predetermined range). This dynamic behavior resolves the contradiction by making the imaging area flexible rather than fixed.
Solution Approach 2:
The system changes the imaging area parameter based on detected eye movement characteristics. When eye movement is detected beyond the predetermined range, the tracking control unit modifies the imaging area parameter to either restrict it to maintain quality or extend it dynamically, depending on the movement magnitude and pattern. This parameter adjustment strategy allows optimization of both coverage and quality under different conditions.
2Reliability
If tracking function is activated to follow eye movement, then the ability to capture same region is improved, but the complexity of the apparatus increases
Solution Approach 1:
The tracking control unit operates autonomously by automatically detecting eye movement and adjusting the imaging area without requiring manual intervention. The system self-regulates based on detected eye position, eliminating the need for complex manual tracking mechanisms or additional user input devices. This self-service approach improves reliability while keeping the added complexity manageable.
Solution Approach 2:
The tracking control unit integrates multiple functions into a single component: eye movement detection, imaging area adjustment, and quality monitoring. By combining these functions in one unit rather than separate components, the patent reduces overall apparatus complexity while maintaining the ability to reliably capture the same eye region despite movement.
3Manufacturing precision
If the imaging area is restricted to within predetermined range, then the image quality is maintained, but the flexibility for follow-up examinations is reduced
Solution Approach 1:
The imaging area is dynamically adjusted based on the examination type and eye movement conditions. For follow-up examinations, the system can extend the imaging area beyond the predetermined range when needed, while maintaining quality through real-time tracking. This dynamic flexibility allows the same apparatus to serve both quality-critical and versatility requirements.
Solution Approach 2:
The system performs preliminary detection of eye movement characteristics before finalizing the imaging area. By detecting eye position and movement patterns in advance, the tracking control unit can pre-adjust the imaging area to ensure both quality and flexibility are maintained, particularly important for follow-up examinations where consistency is key.
Data Source
AI summary
An ophthalmologic photographing apparatus includesa determination unit configured to determine, using the detected information, whether or not an imaging area for imaging an eye is beyond an edge of a predetermined range of movement of the eye to be examined, anda tracking control unit configured to track the imaging area using the detected information, in a case where an imaging mode different from a follow-up imaging mode is selected and the imaging area is determined not to be beyond the edge, to not track the imaging area, in a case where an imaging mode different from the follow-up imaging mode is selected and the imaging area is determined to be beyond the edge, and to track, using the detected information, the imaging area without making the determination by the determination unit, in a case where the follow-up imaging mode is selected.