Moveable Side Wall IOL Injector for Haptic Protection
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Solution Overview
Problem
The insertion of complex haptic structure intraocular lenses (IOLs) into the eye using conventional IOL injectors often results in haptic damage and incorrect orientation due to the complexity of the haptic structure.
Innovation Solution
A moveable side wall IOL injector with voids on each side wall, allowing for controlled bending and compression of the haptics and optic to facilitate safe and accurate insertion, where the side walls move relative to each other to form a passage for directing the IOL into the eye, with a tubular member to receive the compressed lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional IOL injectors are used to insert complex haptic structure IOLs, then the injection process can be performed, but haptic damage and incorrect orientation occur
Solution Approach 1:
The injector is divided into distinct functional zones: compression chambers with moveable side walls for compressing the optic, and haptic voids for receiving and protecting the haptic structures. This segmentation allows different parts of the IOL to be handled differently during injection, preventing haptic damage while enabling compression of the optic for delivery through small incisions.
Solution Approach 2:
The injector provides different local environments for different parts of the IOL: the compression chambers apply localized pressure to the optic to enable folding, while the haptic voids provide a protective, non-compressive environment that maintains haptic integrity. This local differentiation of mechanical properties prevents haptic damage while achieving the necessary optic compression.
2Length of moving object
If the IOL is compressed for injection through small incisions, then delivery is facilitated, but haptic damage may occur
Solution Approach 1:
The compression device separates the IOL into two distinct zones: the optic portion is compressed between moveable side walls to reduce its longitudinal dimension for delivery, while the haptic portions extend into protected voids where they are shielded from compression forces. This allows the IOL to be delivered in a compact form while maintaining haptic integrity.
Solution Approach 2:
The haptic voids act as intermediary protective zones that receive and isolate the haptic structures from the compression forces applied to the optic. The voids provide a mechanical buffer that prevents compression forces from being transmitted to the haptics, thereby protecting them from damage during the compression and delivery process.
3Adaptability or versatility
If the haptic structure is complex, then accommodative vision is enabled, but insertion becomes complicated and haptic damage occurs
Solution Approach 1:
The injector design segregates the complex haptic structures from the compression zone, placing them in protected voids during the injection process. This allows the complex multi-element haptic assemblies (including plates, filaments, and loops) to be handled as a unified protected structure, simplifying the insertion process despite their inherent complexity.
Solution Approach 2:
The haptic voids are designed to receive and cushion the complex haptic structures before insertion into the eye. This pre-protection allows the delicate multi-component haptic assemblies to be compressed and delivered without risk of damage to any individual haptic element, thereby enabling the use of complex accommodative designs.
Data Source
AI summary
An injector for inserting an intraocular lens (IOL) into an eye, comprising: a first side wall and a second side wall which are movable relative to one another, each side wall including a void, the voids positioned opposite one another in a direction perpendicular to a longitudinal axis of the injector. The injector may be in a combination with the IOL, the IOL disposed on a portion of the injector. The IOL may be in an unstressed state. A first portion of a haptic of the IOL may extend into the void in the first side wall.