Adaptable Visual Indicia for Dynamic Acuity Testing
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Solution Overview
Problem
Conventional eye chart methods for assessing visual acuity are limited by the need for physical space, inability to test dynamic visual acuity, and difficulties in assessing illiterate or non-native speakers, and are inefficient for training purposes.
Innovation Solution
The use of adaptable visual indicia on a display device that adjust in size and movement to assess both static and dynamic visual acuity, allowing for accurate perception inputs from subjects, thereby enabling efficient testing and training of visual sensitivity without the need for extensive space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional eye chart is used to assess visual acuity, then the assessment can be performed with simple equipment, but physical space is required to place the subject at a sufficient distance from the chart
Solution Approach 1:
The patent transitions from a two-dimensional physical eye chart to a multi-dimensional digital display system that can present visual stimuli in various orientations, sizes, and motion patterns, eliminating the need for fixed physical distances while maintaining assessment accuracy
Solution Approach 2:
The system dynamically adjusts the size, position, and motion of visual indicia on the display device, allowing the same equipment to simulate different testing distances and conditions without requiring physical space for subject positioning
2Measurement precision
If a traditional eye chart with language-based indicia is used, then the chart can clearly present visual targets, but assessing the visual abilities of illiterate individuals or non-native speakers becomes difficult or impossible
Solution Approach 1:
The digital display system can present multiple types of visual indicia including universal symbols, pictures, and non-language-based targets, making the assessment tool universally applicable to individuals regardless of literacy or language background while maintaining measurement precision
Solution Approach 2:
The system can change the parameters of visual indicia such as type, complexity, and cultural relevance based on the subject's characteristics, adapting the assessment content while maintaining the core function of measuring visual acuity accurately
3Area of stationary object
If multiple indicia are crowded on a single eye chart, then the chart can be compact, but difficulties arise for individuals with unsteady fixation unrelated to basic static visual acuity
Solution Approach 1:
The system presents visual indicia individually or in small sequences rather than crowding multiple indicia together, allowing individuals with unsteady fixation to focus on one target at a time while the system tracks their responses to assess visual acuity reliably
4Device complexity
If a traditional eye chart arrangement is used, then the setup is simple and static, but it only tests static visual acuity and cannot measure dynamic visual acuity where objects are moving relative to the subject
Solution Approach 1:
The digital display system can dynamically present both static and moving visual indicia, enabling the same simple equipment to test both static visual acuity and dynamic visual acuity by controlling the motion parameters of displayed targets
Solution Approach 2:
The testing system serves multiple functions by presenting various types of visual stimuli including static targets, moving targets, and targets with different motion characteristics, all through a single unified platform that maintains operational simplicity
Data Source
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Figure 2B
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AI summary
The present invention tests and/or trains the visual sensitivity of a subject using adaptable visual indicia. One or more visual indicia possessing a visual trait are displayed to the subject. The displayed visual indicia possessing a visual trait may be adjusted to determine when a subject can and cannot be perceived by the subject. A displayed visual indicia may be adjusted in its size, rate of movement, direction of movement, location of display, duration of display, or other characteristic. To determine whether a subject correctly perceived the visual trait possessed by a displayed visual indicia, an input may be received from the subject. If an input received corresponds to the visual trait possessed by the displayed visual indicia, the subject may be determined to have correctly perceived the displayed visual indicia and the visual trait.