Vision Evaluation System Using Dynamic Wavelength Variation
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Solution Overview
Problem
Existing methods for identifying latent hyperopia are challenging due to the subject's ability to compensate with eye accommodation, making it difficult to detect and treat this vision disorder effectively.
Innovation Solution
A system and method that utilize a display with two portions emitting different wavelengths of light, varying one wavelength within a predefined range to determine the subject's perception of optotypes, allowing for the identification of refractive errors and prescription components for eyewear based on the subject's perception of optotypes displayed on both portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional vision testing methods are used, then the testing process is simple and quick, but the ability to detect latent hyperopia is poor due to subject accommodation compensation
Solution Approach 1:
The system dynamically varies the wavelength of light presented to the subject's eye during testing. By changing the wavelength parameter in real-time, the system prevents the eye's accommodative muscles from maintaining a fixed compensation state, thereby revealing latent hyperopia that would otherwise remain undetected by static testing methods.
Solution Approach 2:
The invention changes the physical parameter of light wavelength to detect refractive errors. By presenting optotypes at different wavelengths and comparing subject perception, the system can identify latent hyperopia without requiring complex additional hardware, thus improving detection accuracy while maintaining relative system simplicity.
2Measurement precision
If the subject's eye is given time to accommodate, then the subject can compensate for refractive errors, but this makes it difficult to identify latent hyperopia
Solution Approach 1:
The system employs periodic variation of wavelength parameters during the vision test. By rhythmically changing the wavelength of presented optotypes, the system disrupts the subject's ability to maintain steady accommodative compensation, enabling detection of latent hyperopia within a controlled time frame that balances accuracy and efficiency.
3Measurement precision
If multiple wavelength values are tested, then the precision of vision disorder detection improves, but the complexity of the testing procedure increases
Solution Approach 1:
The testing procedure is segmented into distinct phases: presenting optotypes at a first wavelength, then at a second wavelength, and comparing subject responses. This segmentation allows multiple wavelength measurements to be taken systematically without overwhelming the subject or the operator, maintaining ease of operation while achieving high detection precision through multi-wavelength comparison.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate detection of refractive errors, including latent hyperopia, by ensuring the subject's eye does not have time to accommodate, providing a precise method for determining vision disorders and eyewear prescriptions.
Implementation Method 1
causing the first display portion to emit light having a first wavelength value, causing the second display portion to emit light having a second wavelength value
Implementation Method 2
Hyperopia is an abnormal condition of an eye in which parallel rays of light are focused behind a retina
Data Source
AI summary
A method of evaluating a vision of a subject including: causing a display to define a first display portion and a second display portion; causing the display to emit, from the first display portion, light having a first wavelength value and to emit, from the second display portion, light having a second wavelength value; causing the display to present, on the first display portion, one or more first optotypes and to present, on the second display portion, one or more second optotypes; varying with time the second wavelength value within a predefined wavelengths range; obtaining an indication concerning a subject's perception of the one or more second optotypes as compared to a subject's perception of the one or more first optotypes; and determining a vision disorder of the subject based on the second wavelength value for which the indication has been obtained.