Accommodating Intraocular Lens Assembly with Stanchions
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Solution Overview
Problem
Current intraocular lenses (IOLs) lack the ability to dynamically adjust their optical power to focus on both near and distant objects like the natural human lens, limiting their accommodative function and leading to visual distortions and aberrations.
Innovation Solution
The development of an accommodating intraocular lens assembly with a positive-power lens and stanchions that extend between base and distal ends, positioned in the ciliary sulcus, allowing the lens to move along the central optic axis in response to ciliary muscle contraction, mimicking the natural lens's accommodative mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a prosthetic intraocular lens is implanted to replace the natural lens, then vision correction is provided, but the ability to dynamically adjust optical power for near and distant focusing is lost
Solution Approach 1:
The patent implements a dynamic accommodating intraocular lens system where the lens position and optical power can be adjusted. The lens assembly includes movable components that allow the lens to shift position and change focal length in response to ciliary muscle contraction, restoring the dynamic accommodative function that is typically lost after cataract surgery.
Solution Approach 2:
The intraocular lens is divided into multiple components including a fixed lens assembly and a movable lens element. This segmentation allows the movable portion to independently adjust its position and optical properties while the fixed portion provides structural support and basic vision correction, enabling dynamic accommodation without compromising overall lens stability.
2Ease of manufacture
If current IOL designs are used, then surgical simplicity is maintained, but visual distortions and aberrations occur due to inability to accommodate
Solution Approach 1:
The patent introduces dynamic adjustability to the IOL system, allowing the lens to change its optical power in response to physiological cues from the ciliary muscle. This dynamic capability eliminates visual distortions and aberrations associated with fixed focal length lenses, while the surgical implantation process remains relatively simple and straightforward.
3Stability of the object's composition
If the natural lens is replaced with a fixed-power IOL, then long-term stability is achieved, but the ability to focus on both near and distant objects is compromised
Solution Approach 1:
The patent creates a stable yet adaptable lens system where the lens assembly maintains structural stability through its fixed housing and mounting mechanisms, while the lens element itself can dynamically adjust its position and optical power. This dual characteristic allows the lens to provide both long-term stability and focus adjustment capability for near and distant objects.
Solution Approach 2:
By dividing the lens into fixed and movable segments, the patent achieves a separation of functions: the fixed portion provides structural stability and basic optical correction, while the movable portion enables dynamic focus adjustment. This segmentation allows each component to optimize its specific function without compromising the other.
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
This design enables smooth transition of accommodative power, reducing visual fluctuations and improving focus from distance to near, thereby enhancing visual acuity and reducing the need for corrective lenses.
Implementation Method 1
The plurality of stanchions can each extend between a base end and a distal end... The positive-power lens can be connected with each of the plurality of distal ends whereby the center of the positive power lens is moved along the central optic axis in response to contraction of the first arcuate periphery
Data Source
AI summary
A method of positioning an accommodating intraocular lens assembly in an eye can include implanting an accommodating intraocular lens assembly having a positive power lens in the eye. The accommodating intraocular lens assembly can also include a plurality of stanchions extending between base ends and distal ends. The base ends can be disposed in spaced relation to one another about a first arcuate periphery positioned in a ciliary sulcus of the eye. The distal ends can be disposed about a second arcuate periphery extending in a second plane positioned forward and outside of a capsular bag of the eye. The positive-power lens can be connected with the plurality of distal ends whereby a center of the positive power lens is moved along the central optic axis in response to contraction of the first arcuate periphery by contraction of the ciliary sulcus.