Tilt Adjustable Intraocular Lens for Negative Dysphotopsia
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Solution Overview
Problem
Negative dysphotopsia is a common side effect following cataract surgery due to the implantation of intraocular lenses, which can be exacerbated by the tilt of the optic relative to the visual axis, and existing methods lack effective strategies to predict and mitigate this issue.
Innovation Solution
Determine the angle kappa of the eye pre-operatively, select a tilt adjustable intraocular lens, and adjust the optical axis to center it with the visual axis to reduce the likelihood of negative dysphotopsia, using methods such as screw coupling or laser ablation for tilt adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard intraocular lens is implanted to correct optical aberrations, then vision correction is achieved, but negative dysphotopsia occurs due to optic tilt relative to the visual axis
Solution Approach 1:
The intraocular lens is designed with an adjustable optic tilt mechanism that allows the optical axis to be dynamically adjusted relative to the platform after implantation. This enables the lens to adapt to the individual's visual axis alignment requirements, resolving the contradiction between achieving vision correction and preventing negative dysphotopsia caused by fixed tilt angles.
Solution Approach 2:
The invention changes the tilt angle parameter of the optical axis relative to the platform to optimize alignment with the visual axis. By adjusting this geometric parameter, the lens achieves proper positioning that eliminates negative dysphotopsia while maintaining effective vision correction, directly addressing the harmful effect of standard fixed-tilt lenses.
2Object-affected harmful factors
If the optic tilt is adjusted to align with the visual axis to reduce negative dysphotopsia, then dysphotopsia is reduced, but the device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The intraocular lens is segmented into distinct functional components: a platform that provides structural support and an adjustable optic portion that can be independently tilted. This segmentation allows the tilt adjustment mechanism to be isolated to specific components, reducing overall device complexity while enabling the necessary alignment adjustments to eliminate negative dysphotopsia.
3Reliability
If angle kappa is determined pre-operatively to predict negative dysphotopsia risk, then surgical planning is improved, but measurement precision requirements increase
Solution Approach 1:
Angle kappa is determined pre-operatively through non-invasive imaging and measurement techniques, allowing surgical planning to be performed in advance. This preliminary measurement and planning process enables the surgeon to select appropriate lens parameters and adjustment strategies before implantation, improving outcome reliability without requiring excessively high measurement precision during the actual surgery.
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
Reduces the prevalence of negative dysphotopsia by aligning the intraocular lens optic with the visual axis, improving post-surgical vision quality and reducing the need for additional ophthalmic corrections.
Implementation Method 1
adjust the tilt of the optical axis with respect to the platform to center the optic with respect to the visual axis of the individual's eye, including laser ablating a portion of the optic or the platform to adjust the tilt
Data Source
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AI summary
Apparatuses, systems, and methods directed to reducing negative dysphotopsia in an individual's eye. Such apparatuses, systems, and methods may include determining an angle kappa of an individual's eye. Such apparatuses, systems, and methods further include tilt adjustable intraocular lenses.