Multi-Direction Eye Tracking Ophthalmologic Apparatus
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Solution Overview
Problem
Current ophthalmologic apparatuses face challenges in accurately matching the optical system with the eye for precise examinations, particularly in aligning and tracking the eye's movement, which affects the precision and accuracy of optical examinations.
Innovation Solution
An ophthalmologic apparatus equipped with multiple imaging parts that obtain moving images from different directions, an extracting part to trim or adjust opacity of partial images, and a controller to analyze displacement and control the optical system for precise alignment and tracking, ensuring the optical system is correctly positioned relative to the eye for both fundus and anterior eye examinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple imaging parts are used to obtain moving images from different directions, then the measurement precision of eye position is improved, but the device complexity increases
Solution Approach 1:
The apparatus divides the imaging function into multiple imaging parts (first imaging part and second imaging part) that capture images from different directions. Each imaging part focuses on specific regions, allowing the system to achieve comprehensive eye position measurement through coordinated operation of segmented imaging components.
Solution Approach 2:
The system transitions from single-direction imaging to multi-directional imaging by adding imaging parts at different spatial positions and angles. This dimensional expansion enables three-dimensional eye position tracking by combining information from multiple viewing angles, thereby improving measurement precision.
2Manufacturing precision
If partial images are extracted and analyzed from multiple images simultaneously obtained, then the alignment precision is improved, but the loss of time in image processing increases
Solution Approach 1:
The extracting part selectively extracts relevant partial images or specific regions from the multiple images captured simultaneously by different imaging parts. By focusing analysis on extracted portions rather than processing entire images, the system achieves precise alignment while reducing computational time and resources required.
Solution Approach 2:
Instead of analyzing all image data in full detail, the system applies partial action by extracting and analyzing only the necessary portions of images that contain critical alignment information. This selective approach maintains alignment precision while minimizing processing time.
3Measurement precision
If the optical system is moved to maintain positional relationship with moving eye, then the tracking accuracy is improved, but the device complexity increases
Solution Approach 1:
The controller continuously receives position information from the imaging parts, analyzes the eye's movement, and generates feedback signals to adjust the optical system's position. This closed-loop feedback mechanism enables real-time tracking of eye movement while maintaining accurate positional relationship between the optical system and the eye.
Solution Approach 2:
The moving mechanism serves multiple functions: it positions the optical system for initial alignment, maintains tracking during eye movement, and adjusts for different examination conditions. This multi-functionality reduces the need for separate mechanisms, thereby limiting the increase in device complexity while achieving improved tracking accuracy.
Data Source
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AI summary
An ophthalmologic apparatus of an embodiment includes an examination part, moving mechanism, two or more imaging parts, extracting part and controller. The examination part includes an optical system for optically examining an eye. The moving mechanism moves the optical system. The two or more imaging parts obtain moving images of the eye from two or more different directions. The extracting part extracts a partial image from each of two or more images substantially simultaneously obtained by the two or more imaging parts. The controller carries out display control for displaying in real time two or more partial images extracted by the extracting part with an arrangement in accordance with the positional relationship thereof on a display means and movement control for controlling the moving mechanism based on an instruction input from an operation means.