Intraocular Lens Superabsorber Haptic Spacing
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Solution Overview
Problem
The occurrence of secondary cataract after cataract treatment, caused by the capsular bag clouding and deteriorating vision, is a significant issue in existing intraocular lens designs due to the capsular bag touching the optic body, leading to clouding and vision impairment.
Innovation Solution
An intraocular lens with a disc-like optical body and a haptic system featuring a superabsorber that expands when absorbing water, causing the haptics to move from an approaching to a spacing state, thereby maintaining the capsular bag at a distance from the optic body, allowing better water circulation and reducing the likelihood of secondary cataract formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the intraocular lens uses a disc-like optical body, then the lens structure is simple and easy to manufacture, but the capsular bag touches the optical body causing secondary cataract formation
Solution Approach 1:
The haptic is divided into two separate parts: a first haptic and a second haptic. These segmented haptics can be positioned independently to span the capsular bag and maintain spacing between the optical body and capsular bag, preventing secondary cataract while keeping the overall structure simple
Solution Approach 2:
The haptics extend in the axial direction (anterior-posterior dimension) to span the capsular bag, creating a new spatial dimension for separation. This dimensional approach allows the optical body to remain disc-like while the haptics provide the necessary spacing in the axial direction
2Stability of the object's composition
If the capsular bag touches the optic body, then the lens positioning is stable, but water circulation is restricted leading to secondary cataract
Solution Approach 1:
The haptics act as intermediary elements between the optical body and the capsular bag. They maintain a controlled distance, allowing water to circulate through the space created, while still providing stable positioning of the lens within the capsular bag
3Reliability
If the haptic spans the capsular bag to prevent contact, then secondary cataract is prevented, but the device complexity increases
Solution Approach 1:
Only the haptic portions that need to span the capsular bag are designed with the spanning capability, while the optical body remains a simple disc shape. This local application of complexity minimizes overall device complexity while achieving the prevention function
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
The design effectively reduces the probability of secondary cataract formation by ensuring the capsular bag does not contact the optic body, allowing for improved water circulation and maintaining clear vision post-treatment.
Implementation Method 1
The superabsorber is configured to increase its volume by absorbing water
Implementation Method 2
increase its volume by absorbing water, thus bringing the first partial haptic and the second partial haptic from the approach state to the separation state
Data Source
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AI summary
The invention relates to an intraocular lens (1) with an optical body (2) having an optical axis (3), a first haptic (11) having a first partial haptic (13) and a second partial haptic (14) attached to the optical body (2), arranged side by side in an axial direction (9) with respect to the optical axis (3), and having a proximity state and a separation state in which the first partial haptic (13) and the second partial haptic (14) are further apart than in the proximity state, and a superabsorber (4) arranged in the axial direction (9) between the first partial haptic (13) and the second partial haptic (14) and which is configured to increase its volume by absorbing water and thus bring the first partial haptic (13) and the second partial haptic (14) from the proximity state to the separation state.