Symmetrical Intraocular Lens Injector Nozzle Design
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Solution Overview
Problem
Current intraocular lens injectors lack efficient mechanisms for balanced loading and symmetrical delivery of intraocular lenses, which can lead to rotation and misalignment during the insertion process, potentially affecting the accuracy and safety of cataract surgery.
Innovation Solution
The design incorporates a symmetrically arranged nozzle and compartment system with protuberances and rails that apply balanced loading to the intraocular lens, ensuring symmetrical contact and orientation during insertion, and a plunger mechanism that folds the lens for precise expulsion through a narrowing passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional intraocular lens injector is used, then the lens delivery process is simple, but the lens may rotate or misalign during insertion due to unbalanced loading
Solution Approach 1:
The patent applies asymmetry principle by designing the compartment with a symmetrical geometry about a vertical plane, creating balanced loading surfaces that symmetrically contact the lens. This symmetrical design counteracts rotational forces and ensures proper lens orientation during delivery, resolving the alignment precision issue while maintaining manageable device complexity through purposeful geometric symmetry.
Solution Approach 2:
The injector is segmented into distinct functional components: a compartment for lens storage, a plunger for controlled delivery, and a nozzle for precise expulsion. The compartment is further divided with symmetrical loading surfaces and a symmetrical geometry about a vertical plane. This segmentation allows each part to perform its specific function while the overall symmetrical design ensures balanced lens loading and proper alignment.
2Manufacturing precision
If the lens is delivered through a simple passage, then the device is easy to manufacture, but the lens may not be properly oriented or aligned
Solution Approach 1:
The nozzle is designed with a symmetrical geometry about a vertical plane, creating balanced loading surfaces that symmetrically contact the lens. This symmetrical design ensures the lens is properly oriented and aligned during delivery through the nozzle, achieving high orientation accuracy while the nozzle remains manufacturable through standard precision machining of symmetrical features.
3Stability of the object's composition
If the compartment applies unbalanced loading to the lens, then the device structure is simpler, but the lens rotates and misaligns during insertion
Solution Approach 1:
The compartment is designed with a symmetrical geometry about a vertical plane, creating balanced loading surfaces that symmetrically contact the lens. This symmetrical configuration provides stable lens positioning by distributing contact forces evenly, preventing rotation and misalignment during insertion. The balanced loading design achieves positional stability while maintaining reasonable structural complexity through geometric symmetry.
Data Source
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AI summary
Intraocular lens injectors described herein may include a symmetrical arranged storage compartment, nozzle passage, and plunger tip in order to symmetrically fold and provide symmetrical loading to an intraocular lens during advancement and delivery so as to avoid rotation of the intraocular lens about longitudinal, vertical, and/or lateral axes during advancement and/or delivery of the intraocular lens.