Accommodating Intraocular Lens Structure for Dynamic Focus Adjustment
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Solution Overview
Problem
Conventional intraocular lenses (IOLs) lack accommodation capabilities, often require glasses for intermediate and near vision after implantation, and may cause refractive errors, limiting their effectiveness in providing clear vision across various distances.
Innovation Solution
Development of accommodating intraocular lenses (AIOLs) with a fixed lens portion and an accommodating lens portion that can change focus, incorporating pressure sensors to monitor intraocular pressure, and drug-delivery structures to provide therapeutic agents, enhancing functionality and patient comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional IOLs are implanted, then cataract treatment is effective, but accommodation capability is lost and refractive errors occur
Solution Approach 1:
The patent implements a dynamic accommodating lens system where the lens curvature can change in response to ciliary muscle contraction. The lens includes a flexible membrane structure that allows dynamic shape adjustment, enabling the IOL to provide accommodation capability similar to natural lenses while maintaining effective cataract treatment.
Solution Approach 2:
The accommodating lens is divided into multiple functional components including a fixed lens portion, a variable curvature portion, and a haptic structure. This segmentation allows independent optimization of each component's function while collectively providing both stable vision correction and dynamic accommodation capability.
2Reliability
If conventional IOLs are implanted, then far vision can be provided, but intermediate and near vision require glasses
Solution Approach 1:
The accommodating lens is designed to perform multiple functions: providing clear distance vision through its fixed lens portion and enabling intermediate and near vision through dynamic curvature adjustment. This multi-functional design eliminates the need for separate reading glasses or progressive lenses that conventional IOLs require.
3Strength
If single-piece accommodating lenses are manufactured, then structural integrity is maintained, but manufacturing precision is difficult to achieve
Solution Approach 1:
The lens is divided into separately manufacturable components including the fixed lens portion, variable curvature portion, and haptic structure. Each component can be manufactured with high precision using optimized processes, then assembled together to form the complete accommodating lens system.
Solution Approach 2:
The patent employs a nested structure where the variable curvature portion is positioned within the fixed lens portion, and the haptic structure connects to the lens components. This nested arrangement allows precise positioning of each component relative to others during assembly while maintaining overall structural integrity.
Data Source
AI summary
An accommodating intraocular lens (AIOL) can include an accommodating lens structure having an accommodating optical power. The AIOL can include a secondary structure removably connected to the accommodating lens. In some embodiments, the accommodating lens structure is configured to adjust the accommodating optical power in response to radial forces from the capsule of a patient. The secondary structure can be a sensor assembly, a powered lens and/or a light-adjustable lens. In some embodiments, the accommodating lens structure comprises an outer fluid reservoir and a fluid accommodating lens in fluid communication with the outer fluid reservoir. The outer fluid reservoir can be configured to transfer fluid into the fluid accommodating lens in reaction to compressive forces on the outer fluid reservoir.