Intraocular Lens Haptics with Sequential Cord Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Intraocular lenses face challenges in maintaining a stable position within the capsular bag, particularly when sizing is inappropriate, leading to potential injury and imaging errors, especially for toric lenses.
Innovation Solution
The intraocular lens design incorporates haptics with adjustable ropes or springs that can be sequentially cut to change from a compressed to a partially compressed or uncompressed state, allowing for precise positioning and sizing within the capsular bag, minimizing the risk of injury and optimizing image alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the intraocular lens is made larger to improve stability within the capsular bag, then stability is improved, but the risk of injury to the capsular bag increases
Solution Approach 1:
The haptics are designed with a transformation mechanism that allows them to change from a compressed first configuration to an uncompressed second configuration. During insertion, the haptics remain compressed to minimize capsular bag injury risk. After insertion, the haptics are transformed to the uncompressed state to provide enhanced stability and centrality within the capsular bag.
2Object-affected harmful factors
If the intraocular lens is made smaller to reduce risk of injury, then safety is improved, but stability within the capsular bag deteriorates
Solution Approach 1:
The haptics are designed with a transformation mechanism that allows them to change from a compressed first configuration to an uncompressed second configuration. During insertion, the haptics remain compressed to minimize capsular bag injury risk. After insertion, the haptics are transformed to the uncompressed state to provide enhanced stability and centrality within the capsular bag.
3Stability of the object's composition
If the intraocular lens is made larger to improve stability, then stability is improved, but the ability to rotate the lens for correct orientation deteriorates
Solution Approach 1:
The haptics are designed with a transformation mechanism that allows them to change from a compressed first configuration to an uncompressed second configuration. During insertion, the haptics remain compressed to minimize capsular bag injury risk. After insertion, the haptics are transformed to the uncompressed state to provide enhanced stability and centrality within the capsular bag.
4Ease of operation
If the intraocular lens is made smaller to improve rotatability, then ease of operation is improved, but stability within the capsular bag deteriorates
Solution Approach 1:
The haptics are designed with a transformation mechanism that allows them to change from a compressed first configuration to an uncompressed second configuration. During insertion, the haptics remain compressed to minimize capsular bag injury risk. After insertion, the haptics are transformed to the uncompressed state to provide enhanced stability and centrality within the capsular bag.
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 design enables stable and central placement of the intraocular lens, reducing the risk of capsular bag injury and preventing imaging errors by allowing for precise adjustment of the lens's size and orientation within the capsular bag.
Implementation Method 1
the first cable of the cutting sequence is configured to deform the haptic towards the optical body, whereby the first cable of the cutting sequence is under tensile stress
Implementation Method 2
at least the first spring of the cutting sequence is extended from its rest position, and the haptic is first brought into the partially compressed state by successively cutting the springs in the cutting sequence
Implementation Method 3
in the compressed state all of the springs are in a compressed spring state, and the haptic is brought into the partially compressed state by successively bringing the springs into an uncompressed spring state
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to an intraocular lens (1) with an optical body (2), at least two haptics (3a, 3b) and, for at least two of the haptics, a set (9a, 9b) comprising a plurality of cords (4a, 4b, 4c) which are each attached to the optical body and to the haptic belonging to the set and have a cutting sequence, wherein each of the at least two haptics has a compressed state, a partially compressed state and an uncompressed state, wherein for each of the at least two haptics and the set belonging to the respective haptic, in the compressed state the first cord of the cutting sequence is configured to deform the haptic towards the optical body, whereby the first cord of the cutting sequence is under tensile stress and the remaining cords are tension-free.and that the haptic can be brought into the partially compressed state by successively cutting the ropes in the order of cutting, in which the rope that is not cut and has the lowest order number in the order of cutting is arranged to deform the haptic towards the optical body and is thus under tensile stress, and the remaining ropes that are not cut are stress-free, and finally into the uncompressed state in which all the ropes are cut.