Automated Eyesight Testing Control Module for Astigmatism Axis Determination
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Solution Overview
Problem
Current eye examination methods, particularly the Parent's test, are prone to errors in selecting and transcribing preferred directions due to subjective interpretation, which can lead to inaccurate astigmatism determination and prolong the examination process.
Innovation Solution
A visual test method using a control module that displays multiple lines on a selection and reading screen, allowing for the selection and differentiation of lines based on distinct characteristics, ensuring accurate selection and calculation of the compensator cylinder axis value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the operator manually transcribes the subject's direction selection, then the examination can proceed, but errors in transcription occur and accuracy decreases
Solution Approach 1:
The patent replaces the manual mechanical transcription process with an automated electronic system. The control module automatically records the subject's direction selection by detecting which line they indicate, eliminating the need for manual transcription and thereby preventing errors while maintaining examination speed.
Solution Approach 2:
The system enables self-recording where the subject's selection is automatically captured by the control module without requiring operator intervention for transcription. The subject indicates their preferred line and the system autonomously records this data, reducing human error in the process.
2Reliability
If the operator checks understanding with the subject to verify transcription accuracy, then error rate decreases, but examination time increases
Solution Approach 1:
The automated electronic recording system eliminates the need for verification checks between operator and subject. The digital recording is inherently accurate and self-verifying, maintaining high reliability without requiring additional time for manual confirmation.
3Measurement precision
If multiple lines are displayed with distinct characteristics, then line identification becomes clearer, but the display complexity increases
Solution Approach 1:
The patent uses color differentiation to distinguish between multiple lines on the display. Different lines are presented with distinct color characteristics, making it easier for the subject to identify and select their preferred direction without increasing overall system complexity.
Solution Approach 2:
Each line on the display is given distinct local characteristics (such as color, thickness, or style) to facilitate easy differentiation. This localized differentiation helps the subject quickly identify preferred directions without requiring a complex overall display design.
Data Source
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AI summary
The invention relates to an eyesight testing method 200 as well as to an associated control module and system such that: - when (205) the control module receives a selection of a first line while no other line has been selected yet, the control module selects said first line by modifying at least one appearance-related feature of the first line so that the first line changes from an initial appearance to a modified appearance; - when (206) the control module receives a selection of a new line while at least one other line has already been selected, the control module selects said new line by modifying at least one appearance-related feature of the new line so that the new line changes from an initial appearance to a modified appearance, and the control module deselects each line that is not directly adjacent to said new selected line by giving each of said non-adjacent lines its initial appearance.