Plate Haptic IOL with Open Channels for OVD Evacuation
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Solution Overview
Problem
Current intraocular lenses (IOLs) and implantable contact lenses (ICLs) with plate haptics and vault designs trap Ophthalmic Viscosurgical Devices (OVDs) between the lens and the crystalline lens, leading to potential Intraocular Pressure (IOP) elevation, delayed diagnosis of malignant glaucoma, and complications like Urrets-Zavalia syndrome due to the inability to effectively evacuate trapped OVDs.
Innovation Solution
Incorporating open channels or conduits outside the lens optic border, specifically in the vault between the optic and haptic, allowing for the passage of an irrigating cannula to facilitate the evacuation of trapped OVDs, with the channels being wide enough for cannula passage and long enough for sideways movement to ensure effective irrigation and evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vault is added to the IOL/ICL to minimize contact with the crystalline lens, then the optic contact with the crystalline lens is reduced, but OVD becomes trapped between the IOL/ICL and the crystalline lens
Solution Approach 1:
The vault structure is segmented by incorporating openings that divide the continuous vault space into separate regions, allowing OVD to pass through while maintaining the vault's protective function of preventing optic contact with the crystalline lens
Solution Approach 2:
Openings are extracted from the vault structure to create channels that remove the harmful effect of OVD trapping, while the remaining vault structure continues to prevent optic contact with the crystalline lens
2Object-affected harmful factors
If optical holes are added to the IOL/ICL to allow fluid passage, then pupillary block glaucoma is prevented, but OVD evacuation capability is not sufficient
Solution Approach 1:
The solution transitions from two-dimensional optical holes in the optic to three-dimensional open channels extending through the vault structure, creating a volumetric evacuation pathway that can effectively remove OVD while maintaining fluid passage capability
Solution Approach 2:
The open channels serve multiple functions simultaneously: they allow aqueous humor passage to prevent pupillary block glaucoma, provide OVD evacuation pathways, and maintain structural integrity of the IOL/ICL
3Reliability
If the vault is made higher to eliminate optic contact, then the safety margin is increased, but the trapped OVD volume increases
Solution Approach 1:
The vault space is segmented by openings into smaller compartments, preventing large volumes of OVD from being trapped in a continuous space while maintaining the elevated vault structure for contact prevention
Solution Approach 2:
The openings act as intermediary channels that allow OVD to bypass the vault structure, enabling the vault to maintain its height for safety while preventing OVD accumulation
Data Source
AI summary
The present disclosure describes a plate haptic sulcus intraocular lens (IOL) or implantable contact lens (ICL) comprising an optic and a haptic component and at least one open channel for improved evacuation of Ophthalmic Viscosurgical Device (OVD).