Intraocular Lens Haptic Alignment Using Splay Arms
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Solution Overview
Problem
Existing intraocular lens delivery systems face challenges in effectively managing and aligning the haptics of the lens during insertion, leading to potential misalignment and rotation, which can compromise surgical precision and outcomes.
Innovation Solution
The system employs fixtures and actuators to actively manipulate the leading and trailing haptics of the intraocular lens, using splay arms and plungers to straighten and align the haptics before delivery, ensuring precise orientation and alignment through mechanisms like cam systems and independent levers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing intraocular lens delivery systems are used without active haptic manipulation, then the device complexity is reduced, but the manufacturing precision and alignment accuracy of haptics deteriorate
Solution Approach 1:
The delivery system performs preliminary actions by actively manipulating and aligning the haptics before the lens is inserted into the eye. The splay arms and fixtures prepare the haptic configuration in advance, ensuring proper orientation and alignment prior to delivery, which resolves the technical contradiction by achieving high manufacturing precision through pre-delivery manipulation.
Solution Approach 2:
The delivery system is segmented into multiple independent components including leading splay arms, trailing splay arms, plungers, and fixtures that can manipulate each haptic independently. This segmentation allows precise control over each haptic's position and orientation, achieving high alignment precision while managing device complexity through modular design.
2Measurement precision
If active manipulation of haptics is implemented during delivery, then the surgical precision is improved, but the device complexity increases
Solution Approach 1:
The delivery system incorporates dynamic manipulation mechanisms where splay arms and fixtures can actively adjust and reposition haptics during the delivery process. This dynamic capability enables real-time correction and precise positioning, improving surgical precision while the mechanisms are designed to manage the inherent complexity through coordinated motion control.
3Manufacturing precision
If multiple fixtures and actuators are used to manipulate haptics, then the haptic alignment is maintained, but the ease of operation decreases
Solution Approach 1:
Multiple fixtures and actuators are merged into an integrated delivery system where components work in coordination. The leading and trailing splay arms, plungers, and fixtures are combined into a unified mechanism that maintains haptic alignment through coordinated action, improving ease of operation by reducing the need for separate manual adjustments while preserving precise alignment control.
Data Source
AI summary
An apparatus for eye surgery may comprise a nozzle having a delivery lumen, an implant bay coupled to the nozzle, and an implant disposed in the implant bay. The implant may comprise an optic body, a leading haptic, and a trailing haptic. In some examples, the implant may be an intraocular lens. The apparatus may further comprise an actuator comprising a housing and a plunger disposed within the housing and a leading splay arm operable to splay the leading haptic within the implant bay. The plunger can be operable to advance the optic body from the implant bay to the delivery lumen after the leading splay arm straightens the leading haptic.