Prosthetic Capsular Device Stabilizes IOL for Refractive Accuracy
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Solution Overview
Problem
Current cataract surgery techniques face challenges in achieving precise refractive outcomes due to variability in the effective lens position (ELP), which is influenced by the volumetric differences between the cataract, natural capsular bag, and intraocular lens implant (IOL).
Innovation Solution
The development of prosthetic capsular devices that can be inserted into the eye, featuring a housing structure with a refractive surface and a ring structure, allows for the placement of wearable electronic technology devices and intraocular lenses. These devices are designed to stabilize the IOL within the eye, reducing variability in ELP and enhancing refractive accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional cataract surgery with natural capsular bag is used, then the surgical procedure is simple and quick, but the effective lens position (ELP) varies significantly leading to poor refractive outcomes
Solution Approach 1:
The prosthetic capsular device is divided into distinct functional segments: an anterior portion with an opening for IOL insertion, a body portion containing the refractive surface, and a posterior portion with stabilization features. This segmentation allows each part to perform its specific function optimally while maintaining overall device effectiveness.
Solution Approach 2:
The prosthetic capsular device acts as an intermediary structure between the natural capsular bag and the IOL. It provides a stable, predictable platform that mediates the interaction between these components, ensuring consistent ELP and refractive outcomes while simplifying the surgical procedure.
2Manufacturing precision
If femtosecond laser systems are used to control capsulotomy and corneal incisions, then the precision of incision control improves, but the variability in ELP due to volumetric differences between cataract, natural capsular bag, and IOL remains unaddressed
Solution Approach 1:
The prosthetic capsular device changes the volumetric parameter of the capsular space by providing a defined internal volume that matches the intended IOL size. This parameter change ensures that the ELP remains consistent regardless of variations in cataract volume or natural capsular bag dimensions, thereby improving refractive predictability.
3Reliability
If a prosthetic capsular device with housing structure and ring structure is implemented, then the stability of IOL and accuracy of refractive outcomes improve, but the complexity of the device increases
Solution Approach 1:
The ring structure is nested within the housing structure of the prosthetic capsular device. This nested configuration provides IOL stabilization through the ring structure while the housing structure provides the overall framework and refractive surface, achieving enhanced reliability without excessive complexity.
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 use of prosthetic capsular devices improves the accuracy of refractive outcomes in cataract surgery by stabilizing the IOL and reducing the variability in ELP, thereby enhancing patient satisfaction and surgical efficacy.
Implementation Method 1
At least a portion of the posterior surface includes or is a refractive surface
Data Source
AI summary
A prosthetic capsular device configured to be inserted in an eye includes a housing structure and a ring structure. The housing structure includes a first side, a second side opposite the first side, a third side, a fourth side opposite the third side, a posterior side including a refractive surface, an anterior side opposite the posterior side, and a longitudinal axis. The first side, the second side, the third side, the fourth side, the posterior side, and the anterior side at least partially define a cavity configured to contain an intraocular device (e.g., an IOL). The anterior side includes an opening. The ring structure includes a ring structure portion extending radially outward from proximate one of an end of the first side and an end of the second side.