Bionic Intraocular Lens Filtering for Blue-Light Retinal Protection
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Solution Overview
Problem
Conventional intraocular lenses lack natural blue-light filtering capabilities after cataract surgery, exposing the retina to harmful light and increasing the risk of retinal damage, particularly in individuals using digital devices.
Innovation Solution
A lens device with a double-sided light filtering structure comprising a lens base material, light filtering layers, hardened layers, light reducing layers, and waterproof layers, simulating the 53-year-old human lens's light absorption properties, achieved through sequential dyeing, hardening, and vacuum deposition processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional intraocular lenses are used after cataract surgery, then the cloudy lens is removed and vision is restored, but the natural blue-light filtering protection disappears and the retina is exposed to harmful light
Solution Approach 1:
The patent copies the light filtering properties of the natural human lens by measuring the transmittance spectrum of natural lenses at different ages and replicating these spectral characteristics in artificial lens materials. The artificial lens is designed to absorb short-wave blue light (400-500 nm) in the same proportion as natural lenses, thereby copying the protective function against retinal damage while maintaining visual clarity.
Solution Approach 2:
The patent changes the optical parameters of the artificial lens by selecting lens materials and dyeing agents with specific absorption spectra that match natural lens characteristics. By adjusting the concentration and type of dyeing agents, the lens achieves the desired light filtering properties, particularly absorbing 30-60% of 450 nm blue light while maintaining transmittance in the green-yellow region (500-560 nm) for optimal visual acuity.
2Reliability
If the lens absorbs more short-wave blue light to protect the retina, then retinal protection is improved, but visual clarity and contrast may deteriorate
Solution Approach 1:
The patent applies local quality by creating different optical properties in different wavelength regions. The lens is designed to strongly absorb harmful blue light (400-500 nm) while maintaining high transmittance in the visually important green-yellow region (500-560 nm). This selective wavelength-dependent filtering provides both retinal protection and maintains visual clarity, as the eye is most sensitive to green-yellow light for acuity and contrast.
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 lens device effectively absorbs 60% of 450 nm short-wave blue light, reducing retinal damage and improving visual clarity, as demonstrated by increased retinal cell survival and reduced photoretinitis and melatonin suppression.
Implementation Method 1
The light filtering layer exhibits a brown-yellow-green color, preferably the brown-yellow-green color exhibits a color concentration (degree of dyeing) of 28% to 32%
Implementation Method 2
forming a hardened layer on the light filtering layer by solidifying a hardener at high temperature after immersing the lens base material with the light filtering layer formed thereon in a hardener solution
Implementation Method 3
forming a light reducing layer on the hardened layer by depositing a light reducing material using vacuum evaporation method on the lens base material with the hardened layer formed thereon
Data Source
AI summary
A lens device with light filtering function of bionic lens and preparation method thereof are disclosed. The lens device includes a lens base material, a plurality of light filtering layers, a plurality of hardened layers, a plurality of light reducing layers and a plurality of waterproof layers; wherein, the plurality of light filtering layers, the plurality of hardened layers, the plurality of light reducing layers and the plurality of waterproof layers are sequentially disposed on both sides of the lens base material. By impregnating the plurality of light filtering layers with a dyeing liquid solution of a specific color, the lens device with the light filtering function of bionic lens is obtained.