Multifocal Intraocular Lens Design for Peripheral Vision Optimization
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Solution Overview
Problem
Intraocular lenses (IOLs) currently fail to optimize peripheral vision, leading to significant peripheral aberrations such as astigmatism, which can impact overall functional vision and eye development, especially in patients with central vision loss due to conditions like AMD or Stargardt disease.
Innovation Solution
The development of IOLs with a principal plane positioned posteriorly or with a meniscus lens configuration, or a dual lens system with negative and positive powers, to align better with the retina's shape, reducing peripheral aberrations and enhancing peripheral vision. Additionally, a single ring microstructure with a parabolic inner portion and a diffractive outer portion extends the depth of focus and reduces astigmatism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a monofocal IOL is implanted to improve central vision, then central visual acuity is improved, but peripheral aberrations increase significantly
Solution Approach 1:
The IOL optic is divided into multiple concentric zones with different optical powers. The central zone provides focused vision for distance or near, while peripheral zones provide different focal points, thereby reducing peripheral aberrations and improving overall functional vision across the visual field.
Solution Approach 2:
Different regions of the IOL optic are assigned different optical properties. The central region has one optical power for central vision, while peripheral regions have different optical powers to correct peripheral aberrations and extend depth of focus, creating locally optimized vision quality throughout the visual field.
2Ease of operation
If the IOL principal plane is positioned anteriorly for ease of implantation, then surgical ease is improved, but peripheral vision optimization deteriorates
Solution Approach 1:
The patent moves the optimization from a single-plane solution to a multi-dimensional approach by creating multiple focal zones at different depths and locations within the optic. This allows the IOL to function effectively at various positions while optimizing both central and peripheral vision through the distributed focal zones.
3Ease of manufacture
If standard IOL design is used to simplify manufacturing, then manufacturing complexity is reduced, but peripheral aberration correction capability is lost
Solution Approach 1:
The optic is segmented into multiple zones with different optical powers that can be manufactured using conventional lens fabrication techniques. Each zone is defined by specific radial distances from the optical axis, allowing standard manufacturing processes to create the complex multi-zone profile through controlled surface modifications.
Solution Approach 2:
The patent modifies specific optical parameters of the IOL, including the addition of powered zones at defined radial distances from the optical axis. These parameter changes create additional focal points that correct peripheral aberrations while maintaining compatibility with standard manufacturing capabilities.
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
These designs significantly reduce peripheral astigmatism and higher-order aberrations, improving overall functional vision by aligning the image plane with the retina's shape and extending the depth of focus, thus optimizing peripheral vision.
Implementation Method 1
having coupled thereto and/or integrated thereon at least one rotationally asymmetric diffractive structure
Implementation Method 2
an ophthalmic lens, such as an intraocular lens (IOL)... with a multifocal refractive profile
Data Source
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AI summary
The present invention relates to devices, systems, and methods for optimizing peripheral vision. In particular, methods are disclosed which include utilizing particular characteristics of the retina in optimizing peripheral vision. Additionally, various IOL designs, as well as IOL implantation locations, are disclosed which optimize peripheral vision,