Variable Focus Intraocular Lens Dual Movement Mechanism
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Solution Overview
Problem
Current intraocular lenses (IOLs) are primarily monofocal, providing sharp vision at only one distance, whereas accommodating intraocular lenses (AIOLs) aim to offer variable focus across a range of distances, but existing designs often rely on limited mechanisms like axial or lateral movement of optical elements, which restrict the degree of variable focus and aberration correction.
Innovation Solution
The development of lenses with at least two optical elements that combine surfaces for focusing by lateral and axial movement, allowing simultaneous mutual movement to achieve enhanced variable focus, along with additional surfaces for correcting aberrations and fixed refractive errors, utilizing a combination of telescopic and rotational movements for increased accommodative power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If AIOLs use only axial or lateral movement of optical elements, then the lens structure remains relatively simple, but the degree of variable focus is limited
Solution Approach 1:
The patent combines both axial movement and lateral movement mechanisms within a single lens system. The optical elements are designed to move simultaneously in both axial and lateral directions, merging two movement modes to achieve enhanced variable focus capability that exceeds the sum of individual movements.
Solution Approach 2:
The invention transitions from single-dimensional (axial only) or single-directional (lateral only) movement to two-dimensional simultaneous movement. By adding lateral movement as an additional dimension to the traditional axial movement, the system achieves greater accommodative power and focus range.
2Adaptability or versatility
If IOLs are designed as monofocal lenses, then the lens structure is simple and easy to manufacture, but sharp vision is provided at only one distance
Solution Approach 1:
The patent transforms the static monofocal lens into a dynamic system where optical elements can move axially and laterally. This dynamic capability allows the lens to adjust its focal properties in real-time, providing sharp vision across multiple distances rather than being fixed at one distance.
Solution Approach 2:
The lens system achieves multi-functionality by enabling simultaneous axial and lateral movement of optical elements. This allows a single lens to perform multiple focusing functions across different distance ranges, replacing what would traditionally require multiple separate monofocal lenses.
3Adaptability or versatility
If AIOLs use combined axial and lateral movement of optical elements, then the variable focus range is significantly enhanced, but the lens structure becomes more complex
Solution Approach 1:
The patent merges axial and lateral movement mechanisms into an integrated system where both movements work together synergistically. The optical elements are designed with surfaces that utilize both movement modes simultaneously, achieving enhanced variable focus that exceeds the sum of individual movements while maintaining structural coherence.
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 approach significantly enhances the range of variable focus and aberration correction, improving the accommodative power of AIOLs, allowing for sharper vision across multiple distances and addressing limitations in existing IOL designs.
Implementation Method 1
surfaces for focusing by lateral movement, meaning movement substantially perpendicular to the optical axis, of the optical elements
Implementation Method 2
surfaces for focusing by axial movement, meaning movement along the optical axis, of the elements
Implementation Method 3
surfaces for focusing by lateral movement which surfaces are adapted to provide variable focus of which the degree of focus depends on the relative lateral position of the optical elements
Data Source
AI summary
A novel lens for variable focus has two optical elements which simultaneously move in a lateral and an axial direction. The lens also includes variable corrective optics to correct for undesired variable optical aberrations. The lens can be used as an accommodating lens for implantation in the capsular bag. The lens can be driven by either the surfaces of the capsular bag as well as the rim of the capsular bag.