Piggyback Intraocular Lens Positioning for Peripheral Vision
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Solution Overview
Problem
Existing intraocular lenses (IOLs) often degrade peripheral vision due to significant aberrations, which can impact overall functional vision and eye development, particularly in conditions like cataracts and retinal diseases that affect central vision.
Innovation Solution
The principal plane of the existing IOL is displaced posteriorly by a piggyback lens to reduce peripheral aberrations, improving peripheral vision while maintaining good central vision. This is achieved by mechanically pushing the existing IOL further into the eye, adjusting its position to align better with the retina's shape, using a piggyback lens that maintains the IOL's position with haptic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a standard IOL is implanted to improve central vision, then central visual performance is improved, but peripheral aberrations increase and peripheral vision deteriorates
Solution Approach 1:
The patent changes the axial position parameter of the IOL from the standard position (anterior surface approximately 1mm behind the iris) to a posteriorly displaced position (principal plane closer to the nodal point). This parameter change modifies the field curvature to better align with the retina's shape, reducing peripheral aberrations while maintaining central vision correction
Solution Approach 2:
The patent introduces a new spatial dimension by moving the IOL along the axial dimension (anterior-posterior direction). This dimensional shift allows the IOL to address peripheral vision issues without compromising central vision correction, as the posterior displacement changes how light rays focus across different visual fields
2Object-affected harmful factors
If the IOL is displaced posteriorly to reduce peripheral aberrations, then peripheral vision is improved, but the complexity of the implantation procedure increases
Solution Approach 1:
The patent introduces a piggyback lens as an intermediary device that mechanically pushes the existing IOL to the desired posterior position. This intermediary approach allows the original IOL to be reused and positioned correctly without requiring removal or complex modification of the implanted lens
Solution Approach 2:
The solution segments the vision correction function into two parts: the existing IOL that provides central vision correction and the piggyback lens that provides the mechanical force for posterior displacement. This segmentation allows each component to perform its specific function independently, simplifying the overall system
3Object-affected harmful factors
If the IOL position is adjusted to improve peripheral vision, then overall functional vision is improved, but the risk of positional instability increases
Solution Approach 1:
The piggyback lens acts as a stable intermediary that maintains the IOL in the desired posterior position through mechanical support. The haptic systems of both lenses work together to anchor the assembly, providing stability while maintaining the beneficial posterior displacement
Solution Approach 2:
The patent merges the existing IOL with the piggyback lens into a combined optical-mechanical assembly. This merging creates a stable configuration where the two lenses support each other, with the piggyback lens providing both the displacement force and positional stability through its haptic system
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 displacement of the IOL's principal plane reduces peripheral aberrations, enhancing peripheral vision and maintaining on-axis image quality, benefiting patients with cataracts and retinal conditions by improving overall functional vision.
Implementation Method 1
The principal plane of an existing IOL can be moved posteriorly by mechanically pushing the existing lens by an add-on lens (e.g., a piggyback lens)
Implementation Method 2
the connections between the add-on lens and the existing IOL in conjunction with the structure and material properties of haptic systems attached to the existing IOL and the add-on lens can be relied upon to maintain the existing IOL at its desired axial location
Implementation Method 3
This can effectively change the field curvature in the image plane, to better align with the shape of the retina
Data Source
AI summary
The present disclosure relates to devices, systems, and methods for improving or optimizing peripheral vision. In particular, various IOL designs, as well as IOL implantation locations, are disclosed which improve or optimize peripheral vision.