Accommodating Intraocular Lens Fluid Cavity
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Solution Overview
Problem
Conventional intraocular lenses (IOLs) primarily designed for distance vision fail to correct presbyopia, requiring patients to use reading glasses, and existing surgical interventions like LASIK do not effectively address presbyopia, a common condition affecting cataract patients.
Innovation Solution
An accommodating intraocular lens device with a base assembly and a power lens that includes a haptic and a fluid-filled cavity, allowing for radial compressive forces to change the curvature of a flexible membrane and optic, providing a range of refractive correction without significant volume change, thus enabling focus adjustment from near to far and intermediate distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional intraocular lenses are used for distance vision correction, then distance vision is improved, but presbyopia remains uncorrected requiring reading glasses
Solution Approach 1:
The patent employs a dynamic accommodating intraocular lens that can change its optical power by altering the curvature of a flexible membrane through radial compression. The lens transitions from a relaxed state (distance vision) to a compressed state (near vision), enabling continuous adaptation across different viewing distances and eliminating the need for reading glasses
Solution Approach 2:
The invention changes the physical parameters of the lens by applying radial compressive forces that modify the curvature radius of the flexible membrane. This parameter change allows the lens to provide different refractive powers for distance and near vision, simultaneously addressing both distance correction and presbyopia
2Measurement precision
If radial compressive forces are applied to change lens curvature, then refractive correction is improved, but lens volume stability must be maintained
Solution Approach 1:
The patent uses a flexible membrane as the refractive element that can be radially compressed to change curvature without significantly altering the overall lens volume. The flexible shell deforms elastically under compression, maintaining volume stability while achieving the desired change in optical power for refractive correction
Solution Approach 2:
The invention employs a fluid-filled chamber that can be compressed hydraulically to apply radial forces on the flexible membrane. This pneumatic/hydraulic mechanism enables precise control of lens curvature while maintaining constant volume through incompressible fluid, resolving the contradiction between refractive correction and volume stability
3Adaptability or versatility
If accommodating lens mechanism is added, then presbyopia correction is improved, but device complexity increases
Solution Approach 1:
The patent merges the accommodating mechanism with the lens itself by integrating the flexible membrane, fluid chamber, and compression mechanism into a single unified structure. This eliminates the need for separate components and reduces overall device complexity while maintaining presbyopia correction capability
Solution Approach 2:
The flexible membrane serves multiple functions simultaneously: it acts as the refractive element, the structural component that transmits compression forces, and the element that changes curvature for accommodation. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure
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 accommodating intraocular lens device allows for efficient refractive correction across various distances, reducing the need for reading glasses and improving surgical outcomes by maintaining optical quality and stability, with a smaller incision size and faster healing times.
Implementation Method 1
a power lens with a flexible membrane and an optic... and a fluid-filled cavity... allowing for radial compressive forces to change the curvature of a flexible membrane and optic
Implementation Method 2
allowing for radial compressive forces to change the curvature of a flexible membrane
Data Source
AI summary
An accommodating intraocular lens device is provided. The accommodating intraocular lens device comprises a base assembly and a power lens. The base assembly comprises a first open end, a second end coupled to a base lens, and a haptic surrounding a central cavity. The haptic may comprise an outer periphery, an inner surface and a height between a first edge and a second edge. The power lens is configured to fit within the central cavity. The power lens may comprise a first side, a second side, a peripheral edge coupling the first and second sides, and a closed cavity configured to house a fluid. The first side of the power lens may be positioned at a predetermined distance from the first edge of the haptic.