Rotatable Intraocular Lens Fixing Device for Ruptured Capsule
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Solution Overview
Problem
Conventional methods for fixing intraocular lenses are limited in their ability to secure lenses with astigmatism correction or multifocal lenses, especially when the lens capsule is ruptured or lost, as they require specific orientations and strengths that existing fixation methods cannot accommodate, leading to challenges in achieving proper alignment and focusing.
Innovation Solution
An intraocular lens fixing device with a frame that conforms to the ciliary sulcus, featuring a rotatable housing with elastically deformable clamping portions, allowing for flexible insertion and secure fixation of various lens types, including astigmatism correction and multifocal lenses, even in eyes with a ruptured or lost lens capsule.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional intracapsular fixation is used, then the intraocular lens can be fixed within the lens capsule, but this method cannot be applied when the lens capsule is ruptured or lost
Solution Approach 1:
The patent introduces a fixing device with a frame as an intermediary structure between the ciliary sulcus and the intraocular lens. This frame serves as a mediator that can be anchored to the ciliary sulcus and provide support for the lens, eliminating the need for an intact lens capsule while maintaining secure fixation.
Solution Approach 2:
The fixing device is divided into distinct functional segments: a frame portion that conforms to and anchors in the ciliary sulcus, and a lens-holding portion that secures the intraocular lens. This segmentation allows each component to perform its specific function independently, enabling the device to work effectively when the lens capsule is compromised.
2Adaptability or versatility
If ciliary sulcus fixation is used, then the intraocular lens can be fixed when the lens capsule is damaged, but astigmatism correction lenses and multifocal lenses cannot be fixed with proper orientation
Solution Approach 1:
The fixing device incorporates a rotatable mechanism that allows the lens-holding portion to be rotated relative to the frame. This dynamic capability enables surgeons to adjust and optimize the orientation of astigmatism correction lenses and multifocal lenses to match the patient's visual axis and astigmatism axis, while the frame remains anchored in the ciliary sulcus.
3Adaptability or versatility
If suture to the sclera is used, then the intraocular lens can be fixed when the lens capsule is lost, but the procedure is technically complex and difficult
Solution Approach 1:
The patent extracts the complex suturing procedure by replacing it with a frame-based anchoring system. Instead of requiring sutures to attach the lens to the sclera, the frame is designed to conform to and anchor in the ciliary sulcus through its geometric shape, eliminating the need for complex suturing techniques while maintaining secure fixation.
4Manufacturing precision
If the intraocular lens is rotated to match astigmatism direction, then proper astigmatism correction is achieved, but the lens cannot be fixed after rotation with conventional methods
Solution Approach 1:
The rotatable lens-holding portion allows the lens to be rotated to the precise orientation needed for astigmatism correction while remaining securely connected to the anchored frame. This dynamic connection maintains fixation stability throughout the rotation process and ensures the lens remains firmly positioned at the optimized orientation after rotation is complete.
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 device enables secure fixation of intraocular lenses at the correct orientation, maintaining optical alignment and reducing manufacturing costs, while being adaptable to different lens types and eye conditions, thus improving surgical outcomes and reducing tissue damage.
Implementation Method 1
elastically deformable clamping portions
Data Source
AI summary
Provided is an intraocular lens affixing device which makes it possible to affix an intraocular lens of any kind with respect to the inside of an eye with a ruptured or deleted lens capsule. The intraocular lens affixing device 1 is provided with a device support portion (A) and an intraocular lens housing portion (B) connected to the device support portion (A). The device support portion (A) includes a frame 2 having a shape matching a ciliary sulcus 36. Also provided is an affixing kit for inserting an intraocular lens, the kit being provided with a) an intraocular lens affixing device; and b) an injector for injecting the affixing device.