Accommodating Intraocular Lens Stanchion Compression Mechanism
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Solution Overview
Problem
Current prosthetic intraocular lenses (IOLs) fail to replicate the natural lens's ability to adjust optical power for near and far vision, leading to limitations in accommodating focus and causing visual distortions.
Innovation Solution
The development of an accommodating intraocular lens (AIOL) design featuring a first and second lens connected by stanchions, which compress to move apart, allowing for elastic deformation and insertion, and a method to modify the capsular bag for optimal positioning, enabling the AIOL to mimic the natural lens's accommodation mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a prosthetic intraocular lens is implanted to replace the natural lens, then vision correction is provided, but the ability to adjust optical power for near and far vision is lost
Solution Approach 1:
The patent implements a dynamic accommodating intraocular lens system that can change its optical properties in response to ciliary muscle contraction. The lens assembly includes movable components that allow the lens to shift position or change shape, enabling it to adapt between near and far vision focus, thus restoring the dynamic accommodation capability lost in conventional fixed IOLs
Solution Approach 2:
The lens system is divided into multiple separable components including a first lens, a second lens, and intermediate stanchions. This segmentation allows each component to move independently in response to ciliary muscle contraction, enabling the system to achieve variable focus by changing the relative positions of the lens segments
2Adaptability or versatility
If the lens structure is made complex to enable accommodation, then focus adjustment capability is improved, but the ease of insertion and positioning is reduced
Solution Approach 1:
The patent employs a nested configuration where the first and second lenses are positioned within the capsular bag, with stanchions connecting them through the lens capsule. This nested arrangement allows the complex multi-component lens system to be compactly packaged and inserted as a unified assembly, simplifying the surgical implantation process despite the internal complexity required for accommodation functionality
3Ease of manufacture
If the natural lens is replaced with a fixed prosthetic lens, then surgical simplicity is maintained, but visual distortions and lack of focus adjustment occur
Solution Approach 1:
The patent creates a dynamic lens system that responds to ciliary muscle contraction by allowing the lenses to move relative to each other. This dynamic behavior enables the system to adjust focus for both near and distant objects, eliminating the visual distortions and fixed-focus limitations of conventional prosthetic lenses while maintaining surgical feasibility through a mechanically simple activation mechanism
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 AIOL effectively adjusts optical power in response to ciliary muscle contraction, providing clear vision at various distances without significant distortions, enhancing the functionality of prosthetic lenses.
Implementation Method 1
The AIOL can include a first lens, a first plurality of stanchions, a second lens, and a second plurality of stanchions... Compression at the first arcuate periphery and the third arcuate periphery can induce movement of the first lens and the second lens apart from one other
Data Source
AI summary
An intraocular optic assembly can include a first lens, a first plurality of stanchions, a second lens, and a second plurality of stanchions. A central optic axis can extend through centers of the first and second lenses. The first plurality of stanchions can each extend a first distance between a first base end and a first distal end. The first lens can be connected with the first distal ends. The second plurality of stanchions can each extend a second distance between a second base end and a second distal end. The second lens can be connected with the second distal ends. Compression at the peripheries of the stanchions induces movement of the lenses apart from one other.