AR Scotoma Mapping Display for Narrowed Visual Field Compensation
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Solution Overview
Problem
Patients with retinitis pigmentosa and macular degeneration experience a narrowed field of view due to scotomas, which existing technologies have not effectively addressed.
Innovation Solution
An augmented reality (AR) device that sets a scotoma region based on a scotoma map using user input signals to drive scanning points, displaying external images in a display region to compensate for the narrowed field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional display methods are used, then the display shows images in the standard field of view, but patients with retinitis pigmentosa and macular degeneration cannot perceive images in scotoma regions
Solution Approach 1:
The patent applies local quality by displaying images with different characteristics in different regions of the display corresponding to different visual field regions. Specifically, images intended for scotoma regions are displayed with enhanced contrast, brightness, or magnification in specific local areas of the display that map to the patient's scotoma-prone visual regions, allowing targeted compensation for visual deficits without affecting the entire display uniformly
Solution Approach 2:
The patent employs dimensionality change by mapping two-dimensional display regions to three-dimensional visual space, and by transforming images from standard visual field coordinates to scotoma-compensated coordinates. The system creates a transformed visual field map that repositions images from their original locations to new locations that account for scotoma regions, effectively adding a transformation dimension to the display process
2Area of stationary object
If the field of view is expanded to cover scotoma regions, then patients can perceive more of the visual field, but the display complexity increases due to scotoma mapping requirements
Solution Approach 1:
The patent applies preliminary action by pre-determining scotoma regions through visual field testing before normal use, and by pre-establishing a scotoma map that guides subsequent image display decisions. The system performs scotoma detection and mapping in advance, storing the results for use during normal operation, thereby avoiding the need for real-time complex calculations during actual viewing
Solution Approach 2:
The patent uses copying by creating a virtual scotoma map that replicates the patient's actual visual field defects, and by generating transformed images that are copies of original images but adjusted for scotoma compensation. The system creates multiple versions of images - original and transformed - where the transformed version is a modified copy positioned and configured to be visible despite scotoma regions
3Measurement precision
If scanning points are sequentially driven to check scotoma, then accurate scotoma mapping is achieved, but the time required for setup increases
Solution Approach 1:
The patent applies segmentation by dividing the visual field into multiple discrete scanning points that can be tested individually and systematically. The visual field is segmented into a grid or array of points, allowing the system to check scotoma presence at each point separately and build up a complete scotoma map through cumulative point-by-point assessment, balancing precision with efficiency
Data Source
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AI summary
An augmented reality (AR) device for patients with retinitis pigmentosa and macular degeneration according to an embodiment of the present disclosure may include a map providing unit, a region setting unit, and a region display unit. The map providing unit may sequentially drive a plurality of scanning points included in a display of wearable glasses to provide a scotoma map in which a user's scotoma is checked according to the user's input signal. The region setting unit may set the user's scotoma region based on the scotoma map. The region display unit may display an external image corresponding to the scotoma region in a display region included in the display. The augmented reality device for patients with retinitis pigmentosa and macular degeneration according to the present disclosure may set a scotoma region based on a scotoma map in which a user's scotoma is checked according to the user's input signal by sequentially driving a plurality of scanning points included in a display, and display an external image corresponding to the scotoma region in a display region included in the display, thereby compensating for a narrowed field of view of patients with retinitis pigmentosa and macular degeneration and improving the quality of life of patients.