Prosthetic Capsular Device for Intraocular Lens Positioning
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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) caused by the volumetric difference between the cataract, natural capsular bag, and intraocular lens (IOL), despite advancements in femtosecond laser systems.
Innovation Solution
A prosthetic capsular device with a refractive surface is inserted into the eye, allowing for precise positioning of an IOL and enabling adjustment of refractive power, reducing the volume of the IOL and providing a stable platform for accurate refraction, while minimizing the risk of complications such as posterior capsular opacification and vitreous flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a prosthetic capsular device is inserted to maintain capsular volume and stabilize ELP, then refractive outcome accuracy is improved, but device complexity increases
Solution Approach 1:
The device is divided into separate functional components: a capsular support portion to maintain capsular volume and stabilize ELP, and a refractive portion (IOL) to provide optical correction. This segmentation allows each component to be optimized independently while working together to achieve accurate refractive outcomes.
Solution Approach 2:
The prosthetic capsular device acts as an intermediary between the natural capsular bag and the IOL. It provides mechanical support to the capsular bag, maintaining its volume and position, thereby creating a stable platform for the IOL to achieve precise refractive outcomes.
2Object-affected harmful factors
If the IOL volume is reduced to minimize capsular stress, then the risk of posterior capsular opacification is reduced, but the refractive power adjustment capability is limited
Solution Approach 1:
The refractive power of the IOL can be adjusted by changing the curvature radius of the refractive surface. This allows the IOL to provide different refractive powers while maintaining a compact size that minimizes capsular stress and reduces the risk of posterior capsular opacification.
3Reliability
If the natural capsular bag is preserved to maintain eye anatomy, then the risk of complications is reduced, but the ability to control IOL positioning is limited
Solution Approach 1:
The prosthetic capsular device is inserted into the capsular bag before the IOL to establish a stable platform and define the optimal positioning for the IOL. This preliminary action creates a controlled environment that facilitates precise IOL positioning while preserving the natural capsular bag anatomy.
Solution Approach 2:
The prosthetic capsular device serves as an intermediary structure within the capsular bag that provides mechanical support and positioning guidance for the IOL. It maintains the integrity of the natural capsular bag while enabling precise control over IOL placement and orientation.
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 prosthetic capsular device enhances the accuracy of refractive outcomes, reduces the risk of complications, and allows for intraoperative pseudophakic refraction and future lens exchanges with minimal damage to the natural capsular bag, thereby improving surgical precision and patient vision.
Implementation Method 1
at least a portion of the posterior surface includes or is a refractive surface
Data Source
AI summary
Prosthetic capsular devices (e.g., bag, bowl, housing, structure, cage, frame) include technology devices such as a computer, virtual reality device, display device, WiFi/internet access device, image receiving device, biometric sensor device, game device, image viewers or senders, GPSs, e-mail devices, combinations thereof, and/or the like. The technology devices can be used in combination with an intraocular lens. The output from the technology device(s) can be fed to the retina of the user to provide a visual image, can be otherwise connected to the user, and/or can be used to control the properties of the intraocular lens or of the prosthetic capsular device. Wearable technology that provides biometric data, such as blood glucose levels, body temperature, electrolyte balance, heart rate, EKG, EEG, intraocular pressure, sensing ciliary muscle contraction for accommodation stimulus, dynamic pupil change and retinal prostheses, combinations thereof, and the like can assist in technology-assisted health care functions.