Accommodating Intraocular Lens Ring for Wider Dioptric Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multifocal and monofocal intraocular lenses (IOLs) have limited dioptric power ranges due to the inherent limitations in the movement and adjustment capabilities of the lens, and accommodating IOLs provide only limited improvements in near vision over time, with potential risks of posterior capsule opacification.
Innovation Solution
An accommodation-facilitating intraocular implant comprising a ring and haptics designed to fit within the capsular lens bag, which adjusts the dioptric power of an existing IOL by moving along the optical axis in response to ciliary muscle contraction and expansion, enhancing the focal power of the eye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional multifocal or monofocal IOLs are used, then vision correction is provided, but the dioptric power range is limited by the inherent movement limitations of the lens
Solution Approach 1:
The patent introduces a secondary implant (ring with haptics) as an intermediary device that interacts with the ciliary muscles and zonules to adjust the position of the IOL. This mediator enables the lens to achieve a broader dioptric power range by leveraging the eye's natural accommodation mechanism rather than relying solely on the IOL's inherent movement capability.
Solution Approach 2:
The system is divided into two functional components: the IOL (optic lens) and the secondary implant (ring with haptics). The secondary implant handles the accommodation function by engaging with the ciliary muscles, while the IOL provides the optical correction. This segmentation allows each component to specialize, with the ring expanding the dioptric range and the lens providing vision correction.
2Adaptability or versatility
If accommodating IOLs are used to improve near vision, then accommodation capability is enhanced, but the risk of posterior capsule opacification increases
Solution Approach 1:
The secondary implant acts as a mediator that enables accommodation without requiring the IOL itself to be highly accommodating. By using the ring with haptics to engage the ciliary muscles and adjust the IOL position, the system achieves accommodation capability while keeping the IOL design simpler and less prone to posterior capsule opacification.
Solution Approach 2:
The functional separation places the accommodation mechanism in the secondary implant rather than the IOL. The ring with haptics handles the mechanical accommodation function, while the IOL remains a simpler optical element. This segmentation reduces the complexity and potential failure modes of the IOL itself.
3Object-affected harmful factors
If the IOL is positioned more anteriorly, then night glare is reduced, but the dioptric power adjustment range is limited
Solution Approach 1:
The system provides dynamic adjustment of the IOL position along the optical axis through the ring with haptics that engage the ciliary muscles. This dynamic mechanism allows the IOL to move between more anterior positions (reducing night glare) and more posterior positions (increasing dioptric power), overcoming the static positioning limitations of traditional IOLs.
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 implant facilitates improved near vision by increasing the dioptric power of the IOL, reducing the risk of posterior capsule opacification, and providing more effective accommodation capabilities compared to traditional IOLs.
Implementation Method 1
under contraction and expansion of ciliary muscles of the eye, the plurality of haptics move to adjust the ring along an optical axis of the eye
Data Source
AI summary
An accommodation-facilitating intraocular implant has: a ring sized to fit within a capsular lens bag of an eye; and a plurality of haptics angularly spaced around and radially extended from the ring. A multi-curve implantable accommodating intraocular lens has a convex anterior and concave posterior.