Selective Blue Light Filter for Ophthalmic Contrast
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Solution Overview
Problem
Current blue-blocking ophthalmic systems either impair color vision, cause cosmetic issues due to tint, or reduce overall light transmission, failing to provide effective protection against blue light while maintaining acceptable photopic, scotopic, and circadian vision.
Innovation Solution
An ophthalmic system incorporating a posterior blue-blocking component and an anterior color-balancing component, utilizing optical coatings and dyes to block blue light effectively while maintaining high transmission of visible light and neutralizing color perception, ensuring the system appears clear and does not interfere with normal color vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blue light is blocked using conventional ophthalmic systems, then blue light hazard is reduced, but color vision and cosmetic appearance are impaired
Solution Approach 1:
The patent applies local quality by implementing a wavelength-selective filter that targets only the specific blue light range (400-460 nm) while allowing other wavelengths to pass through. This localized filtering approach blocks harmful blue light at its specific spectral band without affecting the transmission of other visible light wavelengths, thereby preserving color vision while reducing blue light hazard.
Solution Approach 2:
The patent utilizes parameter changes by precisely controlling the spectral transmission characteristics of the ophthalmic system. The filter is designed with specific transmission cutoff parameters that allow it to block blue light below 460 nm while maintaining high transmission above this wavelength. This parameter-based approach enables selective blue light blocking while preserving overall color perception and cosmetic appearance.
2Object-affected harmful factors
If blue light is blocked using conventional ophthalmic systems, then blue light hazard is reduced, but overall light transmission is reduced
Solution Approach 1:
The filter implements local quality by concentrating its blocking effect only in the specific blue light wavelength range (400-460 nm) while maintaining high transmission in all other wavelength ranges. This localized spectral filtering ensures that harmful blue light is blocked without significantly reducing the overall energy transmission of visible light to the retina.
Solution Approach 2:
The patent applies partial action by blocking only the excessive blue light portion (400-460 nm) that causes phototoxicity, while allowing the majority of visible light spectrum to pass through. This partial filtering approach removes the harmful excess blue light energy while preserving sufficient overall light transmission for normal visual function.
3Object-affected harmful factors
If blue light is blocked using conventional ophthalmic systems, then blue light hazard is reduced, but photopic, scotopic, and circadian vision are impaired
Solution Approach 1:
The patent uses parameter changes by setting the filter cutoff wavelength at 460 nm, which is strategically positioned to block phototoxic blue light while preserving wavelengths critical for photopic, scotopic, and circadian vision. This precise parameter selection ensures that the filter removes harmful blue light energy while maintaining transmission of wavelengths necessary for various visual functions and circadian rhythm regulation.
Solution Approach 2:
The filter applies local quality by targeting only the specific blue light band (400-460 nm) that causes phototoxicity, while allowing other wavelength ranges to pass through with minimal attenuation. This localized spectral selectivity ensures that harmful blue light is blocked without significantly impacting the transmission of light wavelengths needed for photopic, scotopic, and circadian vision.
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 system achieves effective blue light blocking with over 80% transmission of visible light, maintaining normal color perception and vision, while reducing the risk of blue light-related retinal damage without causing cosmetic or functional issues.
Implementation Method 1
The posterior blue-blocking component and an anterior color-balancing component. utilizing optical coatings and dyes to block blue light effectively
Implementation Method 2
anterior color-balancing component, utilizing optical coatings and dyes to block blue light effectively while maintaining high transmission of visible light and neutralizing color perception
Data Source
Figure 1A~1B
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AI summary
The present invention relates to ophthalmic systems comprising a selective light wavelength filter, wherein said selective filter provides improved contrast sensitivity.