Selective Light Wavelength Filter for Ophthalmic Contrast Sensitivity

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Solution Overview

Problem

Current blue-blocking ophthalmic systems either impair color vision, cause cosmetic issues due to yellow or amber tint, or reduce overall light transmission, failing to provide effective protection against blue light-induced retinal damage while maintaining acceptable visual acuity and color perception.

Innovation Solution

Development of ophthalmic systems with a selective light wavelength filter that combines blue-blocking components with color-balancing features, using optical coatings and dyes to block specific blue light wavelengths while maintaining high transmission of other visible light, ensuring the system appears color-neutral and does not interfere with normal color perception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If blue-blocking components are used to protect against retinal damage, then protection against blue light-induced retinal damage is improved, but color vision is impaired and cosmetic appearance deteriorates due to yellow or amber tint

Engineering Contradiction:

Improveprotection against blue light-induced retinal damageVSAvoidcolor vision

Core Design Contradiction:

Object-affected harmful factorsVSLoss of information

Solution Approach 1:

The patent applies local quality by implementing a wavelength-selective filter that differentially treats different portions of the spectrum. The filter specifically targets blue light wavelengths (380-500 nm) for blocking while allowing other wavelengths to pass through unchanged, thereby providing localized protection against harmful blue light without affecting color vision or cosmetic appearance in other spectral regions

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs parameter changes by precisely controlling the transmission characteristics of the optical filter. The filter is designed with specific transmission cutoff parameters that block blue light wavelengths (380-500 nm) while maintaining high transmission (>80%) for wavelengths above 500 nm, thus changing the spectral transmission parameters to achieve protection without compromising color vision or appearance

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If blue-blocking components are used to protect against retinal damage, then protection against blue light-induced retinal damage is improved, but overall light transmission is reduced, affecting visual acuity

Engineering Contradiction:

Improveprotection against blue light-induced retinal damageVSAvoidoverall light transmission

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The filter provides localized attenuation only in the harmful blue light region (380-500 nm) while maintaining high transmission in the beneficial visible spectrum (>500 nm). This spatial-spectral selectivity ensures that protection is applied where needed without reducing overall illumination intensity for vision

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements partial action by blocking only the specific portion of the spectrum that is harmful (blue light) rather than blocking all light. The filter allows sufficient light transmission (>80% for wavelengths >500 nm) to maintain visual acuity while applying just enough blocking in the blue region to provide protection

Inventive Principle:

Principle #16Partial or excessive action

3Object-affected harmful factors

If conventional blue-blocking lenses with yellow or amber tint are used, then protection against blue light is improved, but cosmetic appearance deteriorates and color perception is altered

Engineering Contradiction:

Improveprotection against blue lightVSAvoidcosmetic appearance

Core Design Contradiction:

Object-affected harmful factorsVSShape

Solution Approach 1:

The patent changes the transmission parameter profile of the lens from conventional broad-spectrum yellow/amber filtering to a precise wavelength-selective profile. The filter maintains neutral appearance by allowing natural transmission of wavelengths >500 nm while only blocking the harmful blue portion, thus preserving cosmetic appearance and color perception

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent addresses color appearance by implementing a filter that does not introduce yellow or amber tinting. The wavelength-selective filter maintains neutral color appearance by preserving natural transmission in the green, yellow, and red portions of the spectrum, thereby avoiding unwanted color changes in cosmetic appearance and color perception

Inventive Principle:

Principle #32Color changes

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 solution effectively blocks harmful blue light, reducing retinal damage while ensuring high visual acuity, maintaining color perception, and providing a cosmetically acceptable appearance, with over 80% transmission of visible light and minimal impact on scotopic vision and circadian rhythms.

Implementation Method 1

a selective light wavelength filter, wherein said selective filter provides improved contrast sensitivity

Methodology Applied

Scientific EffectSelective light wavelength filtering: Absorption (EM radiation)

Data Source

PatentUS8360574B2High performance selective light wavelength filtering providing improved contrast sensitivity

Publication Date: 2013.01.29 HIGH PERFORMANCE OPTICS INC

AI summary

The present invention relates to ophthalmic systems comprising a selective light wavelength filter, wherein said selective filter provides improved contrast sensitivity.