Intraocular Lens Cartridge Haptic Positioning
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Solution Overview
Problem
Existing systems for inserting intraocular lenses face challenges in securely and reproducibly positioning the front haptics on the optics, leading to potential damage during folding and injection, especially with small incisions.
Innovation Solution
A device comprising two half-shells connected by a hinge, which forms a loading chamber that securely positions and folds the intraocular lens, ensuring the front haptics are safely absorbed and only released when the optics develop in the eye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the intraocular lens is folded for insertion through small incisions, then the incision size is reduced, but the risk of haptic damage increases
Solution Approach 1:
The haptic positioning features (ridges, grooves, or recesses) are pre-configured in the cartridge to automatically position and secure the haptic in a folded state before injection, preventing damage during the folding and injection process through small incisions
Solution Approach 2:
The cartridge serves as an intermediary device that temporarily holds and protects the haptic in a controlled folded position during transfer from the sterile packaging to the injection site, preventing direct manipulation damage
2Length of moving object
If the haptic is folded along with the lens body, then the lens can be inserted through smaller incisions, but the haptic may become jammed or torn off during ejection
Solution Approach 1:
The haptic is extracted from the folded configuration during the ejection process, allowing it to unfold separately from the lens body after safe insertion into the capsular bag, eliminating the risk of jamming or tearing during ejection
Solution Approach 2:
The cartridge is designed with specific geometric features that pre-position the haptic in a controlled manner, ensuring it remains securely attached to the lens body during folding but can be safely released during ejection
3Reliability
If the anterior haptic is positioned securely on the optics, then the lens can be injected safely, but the positioning must be reproducible without additional parts
Solution Approach 1:
The cartridge features localized geometric structures (ridges, grooves, or recesses) at specific positions to engage with corresponding features on the haptic and lens body, providing secure and reproducible positioning through the cartridge's inherent geometry rather than additional components
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a device for receiving an intraocular lens with a lens body and at least one haptic, the device containing a first half-shell (13) and a second half-shell (15), which are each connected in an articulated manner to one another at a first of the longitudinal sides of same by means of a first joint (29) and can be moved relative to one another from an open position to a closed position, the inner surfaces (17, 19) of the half-shells forming a storage surface. In the open position, the half-shells (13, 15) form an open chamber (46) for positioning or storing the lenses in a relaxed state, and in the closed position, the half-shells (13, 15) form an enclosed chamber (36) for positioning or storing the lenses in a folded state and for ejecting the lenses along the longitudinal extent of the half-shells (13, 15).