Ophthalmic Imaging Device Pseudo Position Feedback Alignment
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Solution Overview
Problem
Existing Optical Coherence Tomography (OCT) imaging systems for macular degeneration detection are expensive and require trained technicians, limiting their use for widespread screening due to the need for precise alignment with the optical axis of the eye.
Innovation Solution
An ophthalmic imaging system with improved feedback mechanisms allows users to self-align their eyes with the optical axis by displaying a pseudo position indicator relative to a fixation target, reducing the effort required for alignment and accommodating variations in pupil size, even if part of the pupil is obscured.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If precise alignment with the optical axis is required, then measurement precision is improved, but device complexity and ease of operation worsen
Solution Approach 1:
The system provides real-time visual feedback to the user by displaying the pupil center position on the screen. This feedback loop allows users to see their alignment status and make adjustments accordingly, transforming a complex alignment task into an intuitive visual guidance process.
Solution Approach 2:
The system enables users to perform self-alignment without requiring trained technicians. By providing visual feedback of the pupil center position, the system allows users to independently adjust and achieve proper alignment, eliminating the need for expert operators.
2Measurement precision
If trained technicians are required for operation, then measurement precision is improved, but ease of operation worsens
Solution Approach 1:
The system empowers users to perform self-alignment by displaying visual feedback of their pupil center position. This eliminates the need for trained technicians to manually align the device, allowing anyone to operate the system while maintaining imaging accuracy.
Solution Approach 2:
The patent replaces manual mechanical alignment procedures performed by technicians with an automated visual feedback system. The computer displays visual indicators that guide users to proper alignment, substituting human expertise with an automated guidance mechanism.
3Measurement precision
If exact pupil center alignment is required, then measurement precision is improved, but ease of operation worsens
Solution Approach 1:
The system displays visual feedback showing the pupil center position on the screen. Users can see their alignment status in real-time and make minor adjustments as needed, reducing the effort required to achieve precise pupil center alignment.
Solution Approach 2:
The system provides visual feedback that shows the pupil center position, allowing users to achieve sufficient alignment without requiring perfect precision. The visual guidance enables users to stop when the alignment is good enough, reducing the effort and time required for alignment.
Data Source
AI summary
Ophthalmic imaging systems and related methods provide pseudo feedback to aid a user in aligning the user's eye with an optical axis of the imaging system. An ophthalmic imaging system includes an ophthalmic imaging device having an optical axis, a display device, an eye camera, and a control unit. The display device displays a fixation target viewable by the user. The eye camera images the eye to generate eye image data. The control unit processes the eye image data to determine a position of the eye relative to the optical axis, processes the position of the eye relative to the optical axis to generate a pseudo position of the eye relative to the optical axis, and causes the display device to display an indication that provides feedback to the user that the eye is located at the pseudo position of the eye relative to the optical axis.