Shape Memory Intraocular Lens Diopter Adjustment
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Solution Overview
Problem
Current accommodating intraocular lens assemblies face challenges in providing continuously variable Diopter strength for both distance and near vision, and they often require complex surgical interventions for adjustment, which can be invasive and inefficient.
Innovation Solution
The development of intraocular lens assemblies with shape memory optical elements that are elastically deformable between non-compressed and compressed states, allowing for in situ manual displacement along the visual axis, facilitated by a 'push and twist' bayonet arrangement and haptics systems with radiation-sensitive regions, enabling adjustable Diopter strength without the need for extensive surgical intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If complex surgical interventions are used for adjustment, then Diopter strength can be adjusted, but the procedure becomes invasive and inefficient
Solution Approach 1:
The patent replaces complex mechanical surgical adjustment mechanisms with a shape memory optical element that responds to radiation (light or heat). The optical element automatically changes its Diopter strength when exposed to radiation, eliminating the need for invasive surgical interventions and complex mechanical adjustment systems.
Solution Approach 2:
The patent changes the physical state of the optical element through radiation exposure, causing it to transition between different Diopter strength states. This parameter change approach allows for non-invasive adjustment of the lens's optical properties without requiring surgical intervention.
2Adaptability or versatility
If shape memory optical elements are used, then continuously variable Diopter strength is achieved, but the lens structure becomes more complex
Solution Approach 1:
The patent merges the shape memory functionality directly into the optical element itself, rather than adding separate adjustment mechanisms. The shape memory optical element combines the lens function with the adaptive shape-changing capability in a single integrated component, reducing overall system complexity despite the enhanced functionality.
Solution Approach 2:
The patent utilizes phase transitions or state changes in the shape memory material to achieve continuous variability in Diopter strength. The optical element can transition between different physical states (compressed vs. non-compressed) that correspond to different optical power states, providing adaptability without requiring multiple discrete components.
3Manufacturing precision
If in situ manual displacement is implemented, then accurate deployment is achieved, but the adjustment mechanism becomes more complex
Solution Approach 1:
The patent replaces manual mechanical displacement mechanisms with radiation-induced shape memory activation. The optical element is positioned and adjusted through radiation exposure that triggers the shape memory effect, eliminating the need for complex mechanical displacement mechanisms while maintaining accurate deployment.
Solution Approach 2:
The shape memory optical element performs its own positioning and adjustment functions in response to radiation exposure, without requiring external mechanical manipulation systems. The lens self-adjusts its position and Diopter strength through the radiation-triggered shape memory effect, reducing the complexity of external adjustment mechanisms.
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
This solution allows for accurate and efficient adjustment of Diopter strength for both distance and near vision, enabling spectacle-free vision with minimal clinical intervention and accommodating capsular contraction, thus enhancing the flexibility and effectiveness of intraocular lens deployment.
Implementation Method 1
at least one shape memory optical element resiliently elastically deformable between a non-compressed shape with a first Diopter strength and a compressed shape with a second Diopter strength
Implementation Method 2
resiliently elastically deformable between a non-compressed shape and a compressed shape
Implementation Method 3
haptics system with at least two haptics having radiation sensitive regions capable of undergoing plastic deformation
Data Source
AI summary
Accommodating intraocular (AIOL) assemblies for enabling post implantation in situ manual selective displacement of an AIOL along a human eye's visual axis relative to stationary anchor points. Axial displacement may be over a continuous range or alternatively at discrete axial stopping positions typically from about 100 μm to about 300 μm apart. Novels AIOLs designed to be at least partially folded for facilitating insertion into a human eye through a relatively small incision.