Rotatable Astigmatism Lens for Post-Insertion Axis Alignment
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Solution Overview
Problem
Once an astigmatism-correcting artificial lens is inserted into the eye, it cannot be adjusted or replaced if the astigmatism axis and the correction axis do not match, leading to potential worsening of astigmatism or the need for corrective measures like glasses.
Innovation Solution
An astigmatism axis adjustable artificial lens is designed with a support part fixed to the lens capsule and an optical lens part that is rotatably coupled to the support part, allowing for adjustment of the correction axis to match the patient's astigmatism axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an artificial lens is inserted into the eye, then the lens becomes fixed and cannot be removed or replaced, but this prevents adjustment of the astigmatism axis if misalignment occurs
Solution Approach 1:
The artificial lens is divided into two separate parts: a support part (haptic) that is fixed to the lens capsule and provides stability, and an optical lens part that can be rotated independently to adjust the astigmatism axis. This segmentation allows the fixation function and adjustment function to be separated, resolving the contradiction between stability and adaptability.
Solution Approach 2:
The optical lens part is designed to be rotatable relative to the support part, introducing dynamic adjustability to an otherwise static system. The optical lens part can be rotated to different angular positions to align the astigmatism correction axis with the patient's actual astigmatism axis, while the support part remains fixed to maintain lens stability.
2Measurement precision
If the astigmatism axis and correction axis do not match, then vision quality deteriorates, but replacing the lens is virtually impossible once inserted
Solution Approach 1:
The rotatable optical lens part enables post-insertion adjustment of the astigmatism axis alignment. If the correction axis does not match the patient's astigmatism axis, the optical lens part can be rotated to achieve proper alignment, ensuring accurate correction without requiring lens replacement.
Solution Approach 2:
The angular orientation parameter of the optical lens part can be changed by rotation to match the patient's specific astigmatism axis. This parameter adjustment allows precise alignment correction while maintaining the lens in place, avoiding the need for replacement surgery.
3Stability of the object's composition
If the artificial lens is made fixed and adhered to the lens capsule, then the lens remains stable in position, but the astigmatism axis may turn due to external forces or injury
Solution Approach 1:
By separating the fixed support part from the rotatable optical lens part, the system allows the support part to maintain stable fixation to the lens capsule while the optical lens part can be independently rotated to correct any axis misalignment caused by external forces or injury.
Solution Approach 2:
The rotatable optical lens part provides the ability to dynamically adjust and restore the astigmatism axis alignment if it shifts due to external forces or injury. The optical lens part can be rotated to realign the correction axis with the patient's astigmatism axis, maintaining reliable correction despite positional changes.
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 solution enables the adjustment of the astigmatism axis of the artificial lens post-insertion, ensuring accurate alignment and correction of astigmatism, thereby preventing complications and maintaining clear vision.
Implementation Method 1
An astigmatism-correcting artificial lens has a function of offsetting a patient's astigmatism on the retina by refracting light entering the eye obliquely
Data Source
AI summary
An embodiment relates to an astigmatism axis adjustable artificial lens which is adjustable so that a correction axis of the artificial lens matches an astigmatism axis when the astigmatism axis and the correction axis of the artificial lens do not match. Here, the astigmatism axis adjustable artificial lens includes a support part and an optical lens part. The support part is fixed to a lens capsule of a patient's eye. The optical lens part is coupled to the support part and has a correction axis that matches the patient's astigmatism axis. The optical lens part is rotatably coupled to the support part to be adjustable so that the correction axis matches the patient's astigmatism axis.