Adjustable Intraocular Lens Diopter via Magnetic Rotation
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Solution Overview
Problem
Conventional intraocular lenses lack the ability to adjust their refractive power after implantation, leading to discomfort and potential reoperation if they do not fit well with the patient's vision or lifestyle, and they cannot correct astigmatic axes, necessitating separate correction with glasses.
Innovation Solution
An intraocular lens with an adjustable diopter mechanism, featuring a haptic with a cylindrical receptacle, an optic that rotates within the receptacle via a thread system, and external magnetic members to adjust the optic's position, allowing non-invasive post-surgery diopter adjustments using a scale for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional intraocular lens with fixed refractive power is implanted, then the surgical procedure is simple and quick, but the lens cannot be adjusted after surgery leading to patient discomfort and potential reoperation
Solution Approach 1:
The patent applies the dynamics principle by making the intraocular lens adjustable after implantation. The optic can rotate within the receptacle to change its position along the optical axis, thereby dynamically adjusting the refractive power (diopter) of the lens. This allows the lens to adapt to post-surgery vision requirements without requiring reoperation, resolving the contradiction between surgical simplicity and post-surgery adaptability.
Solution Approach 2:
The patent uses an external magnetic member as an intermediary to adjust the optic's position non-invasively after surgery. The magnetic member interacts with the magnetic member on the optic through magnetic force, enabling diopter adjustment without surgical intervention. This intermediary mechanism maintains the simplicity of the initial surgical procedure while enabling post-surgery adaptability.
2Ease of manufacture
If an intraocular lens is implanted with calculated refractive power, then the initial surgery is straightforward, but the actual refractive power may differ from calculated values causing vision discomfort
Solution Approach 1:
The patent applies parameter changes by allowing the refractive power of the intraocular lens to be adjusted after implantation. By rotating the optic to different positions, the effective refractive power (diopter) changes, enabling fine-tuning of the lens performance. This resolves the issue where manufactured lens power may not precisely match calculated requirements, as the power can be adjusted post-implantation to achieve optimal vision correction.
3Adaptability or versatility
If a toric lens is implanted to correct astigmatism, then astigmatic correction is provided, but if the lens axis does not align with the patient's astigmatic axis, the correction is ineffective and requires separate glasses
Solution Approach 1:
The patent applies dynamics by making the toric lens rotatable after implantation. The optic can be rotated to different orientations to precisely align the cylindrical axis with the patient's astigmatic axis. This dynamic adjustment capability ensures accurate astigmatic correction without requiring precise pre-surgical alignment, resolving the contradiction between correction capability and alignment precision.
Solution Approach 2:
The patent uses a scale mechanism that provides visual feedback during rotation. The scale on the receptacle and corresponding mark on the optic allow the surgeon to precisely control and verify the lens orientation. This feedback mechanism ensures accurate alignment of the toric lens with the patient's astigmatic axis, resolving the alignment precision issue while maintaining astigmatic correction capability.
4Device complexity
If conventional intraocular lenses are implanted, then the procedure is simple, but reoperation to correct vision issues is technically difficult and invasive
Solution Approach 1:
The patent uses an external magnetic member as an intermediary to adjust the lens without surgery. This non-invasive adjustment mechanism allows post-surgery diopter correction and axis realignment without requiring reoperation. The magnetic interaction enables easy 'repair' or adjustment of the lens parameters while keeping the device structure relatively simple, resolving the contradiction between device simplicity and ease of correction.
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
Enables non-invasive post-surgery diopter adjustments, improving patient satisfaction and quality of life by ensuring optimal vision correction with a single adjustment, accommodating individual vision preferences and correcting astigmatic axes.
Implementation Method 1
one or more magnetic members provided externally in at least one location at a periphery of the optic to rotate the optic by magnetic force
Implementation Method 2
an optic mounted within the receptacle of the haptic, and configured to refract a light
Data Source
AI summary
An intraocular lens (IOL) with an adjustable diopter after surgery is disclosed. According to an aspect of the present disclosure, the intraocular lens with an adjustable diopter after surgery may include: a haptic with a cylindrical receptacle, wherein one or more fixtures are configured to extend outwardly on an outer surface of the receptacle; an optic mounted within the receptacle of the haptic, and configured to refract a light, wherein a thread is formed on an inner circumferential surface of the receptacle, and the optic is configured such that an outer circumferential surface thereof engages with the thread and rotates to be able to move forward or backward in a direction in which the light is incident in the receptacle; and one or more magnetic members provided externally in at least one location at a periphery of the optic to rotate the optic by magnetic force.