Phakic Lens with Openings for Fluid Flow and Pressure Equalization
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Solution Overview
Problem
Current phakic intraocular lens devices face challenges in providing effective and long-lasting vision correction for refractive errors, particularly myopia, with issues related to stability, vaulting, and potential complications such as glaucoma and cataract formation due to inadequate design features.
Innovation Solution
A phakic lens device with a circular optical section, flat haptic structures, and a vaulted section that allows fluid flow between eye chambers, featuring a transition zone with openings for pressure equalization and a diffractive pattern for multifocal vision correction, made from biocompatible materials like PMMA, HEMA, or acrylic, designed to be positioned below the iris for improved stability and reduced risk of complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a phakic lens device is implanted to correct refractive errors, then vision correction effectiveness is improved, but stability and risk of complications (glaucoma, cataract) worsen due to inadequate design
Solution Approach 1:
The lens device is divided into distinct functional segments: an optical section for vision correction, a vaulted section for positioning and stability, and haptic structures for anchoring. This segmentation allows each part to perform its specific function optimally while reducing overall complications
Solution Approach 2:
Different regions of the lens device have specialized properties: the optical section has precise refractive power distribution, the vaulted section has specific curvature for chamber positioning, and the haptics have anchoring features. This local optimization improves effectiveness while minimizing harmful effects in each region
2Stability of the object's composition
If the lens device is positioned in the posterior chamber for stability, then implant stability is improved, but fluid flow between chambers may be restricted worsening pressure equalization
Solution Approach 1:
The vaulted section serves multiple functions simultaneously: it provides structural support for stable positioning in the posterior chamber, creates appropriate vaulting over the crystalline lens, and incorporates openings that enable fluid flow between anterior and posterior chambers for pressure equalization
Solution Approach 2:
The vaulted section incorporates openings that function as porous structures, allowing selective fluid passage between eye chambers while maintaining the structural integrity and positioning stability of the lens device
3Device complexity
If a simple lens design is used, then device complexity is reduced, but manufacturing precision and optical performance worsen
Solution Approach 1:
The lens is segmented into distinct manufacturing zones: the optical section with precise refractive surfaces, the vaulted section with specific geometric curvature, and the haptic structures with anchoring features. This segmentation enables specialized manufacturing processes for each section, achieving high precision without excessive overall 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 device provides stable and effective vision correction for myopia, hyperopia, and astigmatism, reducing the risk of glaucoma and cataract formation by maintaining proper eye pressure and accommodating fluid flow, while also offering improved light transmission and reduced aberrations.
Implementation Method 1
The optical section comprises a diffractive pattern formed thereon, and a plurality of concentric annular zones separated by slanted steps, wherein the concentric zones effect both diffraction and refraction of incident light
Implementation Method 2
the concentric zones effect both diffraction and refraction of incident light
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 1E
AI summary
A lens device (100) structurally adapted to be positioned in the chamber of the eye, preferably the posterior chamber of the eye is disclosed. The device according to some embodiments of the present invention comprises a generally circular optical section (102) characterized by at least one optical power, two generally flat haptic structures (104) at radially opposite sides of the optical part, and a vaulted section (108) connecting the optical section and the haptic structures. In some embodiments, the device comprises at least one opening (110,116,120) for allowing flow of liquid, through the device, between the posterior chamber and the anterior chamber of the eye.