Intraocular Lens Wavy Edge Structure for Dysphotopsia Reduction
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Solution Overview
Problem
Existing intraocular lenses fail to effectively mitigate negative dysphotopsia and glare due to oblique light bypassing or reflecting off the lens edges, which can compromise vision quality and require larger incisions for larger optic diameters.
Innovation Solution
Intraocular lenses with a wavy optic edge and an optic skirt containing light-absorbing colorants or chromophores to block oblique light, combined with undulating surfaces to manage light transmission and reduce glare, allowing for larger optic diameters without increasing incision size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the optic diameter is increased to improve vision quality, then the lens can capture more light and provide better visual acuity, but the incision size must be increased to accommodate the larger lens
Solution Approach 1:
The patent applies curvature by creating an undulating optic edge with multiple peaks and valleys around the circumference of the lens optic. This wavy configuration allows the lens to maintain a compact form factor while effectively blocking oblique light paths, enabling larger optic diameters without proportionally increasing incision requirements
2Object-affected harmful factors
If the optic edge is designed with complex undulating patterns to block oblique light, then dysphotopsia and glare are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies quantitative parameters for the undulating pattern, including peak-to-valley distances of 0.5-2.5mm and specific amplitude ranges. These defined parameters provide clear manufacturing targets while ensuring effective light blocking, balancing optical performance with manufacturability
3Object-affected harmful factors
If the optic edge thickness is varied periodically to create undulating surfaces, then light transmission is better controlled and dysphotopsia is reduced, but the lens design complexity increases
Solution Approach 1:
The optic edge is segmented into multiple discrete undulations with defined peaks and valleys around the circumference. This segmentation creates distinct light-blocking zones that effectively intercept oblique light paths while maintaining a systematic, repeatable pattern that manages design complexity
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 lenses significantly reduce or eliminate negative dysphotopsia and glare while maintaining mechanical stability and enabling larger optic diameters, enhancing vision quality and reducing the risk of posterior capsular opacification.
Implementation Method 1
the optic skirt may comprise a light absorbing colorant, such as a green dye, a red dye, or both, which may reduce the photopic visual maxima
Implementation Method 2
the optic edge may have a wavy profile that extends from about 0.5 millimeters to about 2.5 millimeters from the central optic
Data Source
AI summary
An ophthalmic lens may comprise a posterior optic surface, an anterior optic surface, and an optic edge between the posterior optic surface and the anterior optic surface, wherein the optic edge forms a substantially circular perimeter having a thickness that varies periodically. The thickness of the optic edge may vary periodically for at least two cycles. Additionally, or alternatively, the ophthalmic lens may comprise an optic skirt coupled to the optic edge. The optic skirt can be configured to inhibit transmission of light around the optic edge.