Color-Selective Partial Polarization Filters for Display Color Vision
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Solution Overview
Problem
Existing ophthalmic devices employing binocular rivalry to enhance color vision have not been widely adopted, particularly for use with digital display devices, and there is a need for improved solutions for individuals with color vision deficiency or normal color vision.
Innovation Solution
A spectacle eyewear device with color-selective partial polarization filters is designed, where each lens filters light differently, with specific spectral polarization efficiencies and axis orientations to induce binocular rivalry, enhancing color vision by modifying the perception of color images in linearly polarized light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color-tinted lenses are used to enhance color vision, then color discrimination is improved, but the aesthetic appearance and social acceptance deteriorate due to obvious color differences between lenses
Solution Approach 1:
The patent applies different color tints to different regions of the same lens (e.g., upper portion vs lower portion, or nasal vs temporal regions) rather than uniform tinting. This creates localized color enhancement zones that improve color discrimination for specific visual tasks while maintaining more natural appearance in other regions, thus balancing functionality with aesthetics.
Solution Approach 2:
The patent employs asymmetric color tinting where the left and right lenses have different tint patterns or intensities in specific zones. This asymmetric design provides enhanced color discrimination where needed while creating a more natural, less obvious appearance compared to symmetric full-color lenses, addressing both functional and aesthetic requirements.
2Measurement precision
If strong color filters are used to improve color vision, then color discrimination is enhanced, but visual comfort and natural vision quality deteriorate
Solution Approach 1:
The patent implements partial color filtering by applying tints only to specific portions of the lenses or to specific wavelength ranges, rather than using strong uniform filters across the entire visual spectrum. This partial action provides sufficient color discrimination enhancement for color vision deficiency while preserving enough natural light transmission to maintain visual comfort and avoid excessive visual strain.
Solution Approach 2:
The patent utilizes variable tint density and spectral characteristics, transitioning from strong uniform filters to graduated, multi-zone tinting with varying optical densities. This parameter modification allows optimization of color discrimination in critical regions while maintaining lower optical density in other regions to preserve natural vision quality and visual comfort during prolonged use.
3Measurement precision
If different color tints are applied to left and right lenses, then color vision enhancement is achieved, but lens matching and manufacturing precision become more difficult
Solution Approach 1:
The patent divides each lens into multiple zones with different tint characteristics (e.g., upper/lower segments, nasal/temporal segments). This segmentation allows independent optimization of each zone's color properties while using standardized manufacturing processes for each segment type, reducing overall manufacturing complexity compared to creating entirely custom asymmetric lenses.
Solution Approach 2:
The patent employs universal tinting patterns that can be applied to both left and right lenses using the same manufacturing templates and procedures. By designing symmetric multi-zone tinting patterns where each lens type has its own standardized design, the system achieves color vision enhancement while maintaining consistent manufacturing processes and simplifying lens matching during assembly.
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
The device effectively enhances color vision by inducing binocular rivalry, improving color discrimination for individuals with color vision deficiency and those with normal color vision when using digital display devices.
Implementation Method 1
spectacle eyewear device with color-selective partial polarization filters is designed, where each lens filters light differently, with specific spectral polarization efficiencies and axis orientations to induce binocular rivalry
Implementation Method 2
binocular rivalry is visual phenomenon that occurs when each eye receives different images with visual disparity of sufficient magnitude that the human visual cortex is unable to fuse the images into a coherent scene
Data Source
AI summary
A method, system and/or spectacle eyewear device for modifying the color vision of a person while viewing a color image emitted in linearly polarized light by a display device includes a first lens and a second lens, wherein the lenses each include a color-selective partial polarization filter and the polarization axes the filters are orientated non-parallel to each other and are configured so that a person experiences binocular rivalry due to spectral binocular disparity with respect to the polarized light emitted by the display device. In some variations the polarization axes of the filters are oriented in such a way that the intensity of binocular rivalry is maintained for rotations of the polarized light and/or display device by 45 degrees and by 90 degrees. In some variations the lenses appear substantially identical when viewed in non-polarized light. In some variations the person has color blindness or color vision deficiency.