Prosthetic Capsular Bag for Stabilized IOL Position and ELP Testing
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Solution Overview
Problem
The variability in the effective lens position (ELP) of intraocular lenses (IOLs) during cataract surgery leads to unpredictable refractive outcomes, despite advancements in surgical techniques and technology, as current methods fail to accurately account for the volumetric differences between the natural capsular bag and the IOL.
Innovation Solution
A prosthetic capsular bag, referred to as the Perfect Prosthetic Lenticular Capsule (PPL-C), is designed to maintain the volume of the natural capsular bag, providing a refractive surface for precise IOL positioning and stabilization, allowing for accurate determination of the ELP before implantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current cataract surgery methods are used, then surgical procedure can be performed, but the effective lens position (ELP) of intraocular lenses becomes variable and unpredictable
Solution Approach 1:
The patent introduces an intermediate measurement step using a prosthetic lens or contact lens placed on the cornea to simulate the final refractive state. This intermediary device allows direct measurement of the refractive outcome before actual IOL implantation, thereby eliminating the unpredictable ELP variable. The intermediary acts as a mediator between the current surgical planning and the final refractive result, enabling precise prediction and adjustment.
2Manufacturing precision
If femtosecond laser systems are used to create precise cataract incisions, then incision precision is improved, but the volumetric difference between cataract, natural capsular bag and IOL remains unaccounted for
Solution Approach 1:
The patent performs preliminary measurement and simulation before the actual IOL implantation. By placing a prosthetic lens that replicates the volumetric characteristics of the natural lens, the system allows surgeons to measure and adjust the refractive outcome in advance. This preliminary action accounts for the volumetric difference between the removed cataract, the natural capsular bag, and the incoming IOL, enabling accurate IOL power selection before surgery.
3Productivity
If more ophthalmologists are trained and each performs more surgeries to meet increasing demand, then surgical volume increases, but maintaining consistent refractive outcomes becomes more difficult
Solution Approach 1:
The patent enables the surgical planning process to be self-correcting and self-verifying. The prosthetic lens measurement system allows each surgeon to independently determine the optimal IOL power for their specific patient without relying on complex calculations or expert judgment. This self-service approach standardizes the decision-making process across different surgeons, ensuring consistent refractive outcomes regardless of surgical volume or surgeon experience level.
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 PPL-C enhances refractive outcomes by stabilizing the IOL position, reducing complications from capsular bag rupture, and enabling precise IOL calculations, while offering a prosthetic barrier and potential for pharmaceutical delivery.
Implementation Method 1
at least a portion of the posterior surface is a refractive surface
Data Source
AI summary
The present invention relates to a prosthetic capsular bag and method for inserting the same. The prosthetic capsular bag helps to maintain the volume of the natural capsular bag, thereby stabilizing the effective lens position of an IOL so that refractive outcomes may be improved with cataract surgery. The prosthetic capsular bag further provides an integrated refractive surface, providing a means for experimentally determining an effective lens position prior to inserting an IOL.