Ophthalmoscope Simulator Spatial Tracking
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Solution Overview
Problem
Current ophthalmoscope simulators lack realistic simulation of eye examinations, as they do not accurately track the relative positions of the ophthalmoscope dummy, patient's head dummy, and holder, leading to incomplete and inaccurate representation of the real environment and retina image.
Innovation Solution
A method that uses a position detection system to determine the spatial positions of the ophthalmoscope dummy, patient's head dummy, and holder, allowing for the generation of a virtual retina image only when the relative positions meet predefined conditions, enabling a realistic simulation by tracking these objects and displaying the real environment with virtual elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a position detection system is used to track the relative positions of the ophthalmoscope dummy, patient head dummy, and holder, then the measurement precision of spatial positions is improved, but the device complexity increases
Solution Approach 1:
The position detection system serves multiple functions simultaneously: it tracks the holder position, tracks the ophthalmoscope dummy position, tracks the patient head dummy position, and provides this data to the rendering system. This multi-functionality reduces the need for separate tracking systems for each component, thereby improving measurement precision without proportionally increasing device complexity
Solution Approach 2:
The patent introduces a computer as an intermediary that receives position data from the position detection system and uses it to render the virtual reality image. This intermediary processes the spatial relationships between multiple tracked objects and generates the appropriate visual feedback, simplifying the overall system architecture while maintaining high measurement precision
2Reliability
If the virtual reality image is rendered based on accurate relative positioning, then the realism of the simulation is improved, but the computing power required increases
Solution Approach 1:
The system renders only the necessary portions of the virtual reality scene based on the current viewing angle and position. Instead of rendering the entire scene at full resolution continuously, it updates and renders only the relevant image portions that correspond to what the observer would actually see through the ophthalmoscope, reducing computing power requirements while maintaining simulation realism
Solution Approach 2:
The system pre-calculates and stores image portions of the virtual reality scene that may be needed. By preparing these image segments in advance based on possible viewing angles and positions, the system reduces the real-time rendering load during actual observation, thereby maintaining high simulation realism with reduced computing power demands
Data Source
Figure 1
Figure 2a~3
AI summary
An ophthalmoscope simulator (1) for simulation and a method for simulation of the handling of an ophthalmoscope, comprising a support (1.5) that can be attached to a head (3) of an observer, at least one first imaging display (1.4) disposed on said support, wherein the display (1.4) can be placed in front of an eye (3.1) of the observer for displaying a virtual reality, an ophthalmoscope dummy (1.1) that can be supported by one hand (3.2) of the observer, a position recognition system (5) for determining the spatial position and/or location of the support (1.5) and of the ophthalmoscope dummy (1.1) and a computer (4) for displaying an image (1.3) of an environment (7), a patient head and/or at least a portion of the ophthalmoscope dummy (1.1) on the display (1.4). In particular, a patient head dummy (2) is provided that comprises at least one peripheral surface (2.4) with a patient eye position (2.1) defined therein, wherein the spatial position and/or location of the patient head dummy (2) can be determined and displayed by way of the position recognition system (5) and that in addition to or alternative to the ophthalmoscope dummy (1.1) an image portion (2.2) can be added to the image (1.3) displayed to the observer, wherein the image portion (2.2) represents a virtual retina as could selectively appear to the observer, taking into account the spatial position of the support (1.5), the ophthalmoscope dummy (1.1) and the patient head dummy (2).