Dynamic Stabilization Zones for Contact Lens Rotation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Toric contact lenses face challenges in maintaining rotational stability on the eye due to rotation caused by eyelid movement and blinking, leading to sub-optimal vision correction, and existing static stabilization zones compromise between stability and comfort by increasing thickness.
Innovation Solution
Incorporating dynamic stabilization zones made from deformable materials that change shape under eyelid pressure, allowing for auto-positioning and maintaining optimal orientation through redistribution of fluid or gel within cavities, enhancing rotational speed and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If static stabilization zones are used to maintain rotational stability, then the contact lens can maintain orientation on the eye, but the lens thickness increases and comfort decreases
Solution Approach 1:
The patent applies the dynamics principle by replacing static stabilization zones with dynamic stabilization zones that can change their physical properties in response to external forces. The stabilization zones are made from materials that change viscosity or elasticity under eyelid pressure, allowing them to adapt their shape and thickness dynamically rather than maintaining a fixed static structure. This enables rotational stability without requiring permanently increased lens thickness.
Solution Approach 2:
The patent implements parameter changes by utilizing materials whose physical parameters (viscosity, elasticity, shape) change in response to applied pressure from eyelid movement. The stabilization zones transition between different physical states - remaining relatively stable during normal wear but deforming under blinking forces to facilitate repositioning. This dynamic parameter change allows the lens to maintain stability without permanent thickness increases.
2Stability of the object's composition
If prism stabilization or thickening of the inferior contact lens periphery is used, then rotational stability is improved, but the lens becomes heavier and less comfortable
Solution Approach 1:
The patent replaces heavy static stabilization structures with dynamic stabilization zones that achieve rotational stability through material property changes rather than increased mass. The stabilization zones utilize materials that respond to eyelid forces by changing viscosity or elasticity, providing the necessary stabilizing effect without requiring additional weight in the inferior lens periphery.
Solution Approach 2:
The patent changes the physical parameters of the stabilization zone materials dynamically - using materials that transition between different viscosity or elasticity states in response to applied forces. This allows the lens to achieve rotational stability through parameter changes rather than through increased weight or mass distribution.
3Ease of operation
If the contact lens is designed to auto-position itself on insertion, then initial orientation is improved, but the lens may rotate during wear due to eyelid forces
Solution Approach 1:
The patent implements feedback mechanisms where the dynamic stabilization zones continuously respond to forces applied by the eyelids during blinking and eye movements. When the lens rotates or deviates from its optimal orientation, the eyelid forces act upon the viscoelastic stabilization zones, which deform and generate corrective forces that push the lens back toward its proper orientation. This closed-loop feedback system maintains orientation stability throughout wear.
Solution Approach 2:
The patent uses dynamic stabilization zones that can adapt their mechanical properties in real-time to counteract rotational forces. The zones remain relatively stable during normal wear to maintain orientation but become more compliant under eyelid pressure to allow controlled repositioning and auto-correction of rotation, creating a dynamic balance between stability and adjustability.
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 dynamic stabilization zones improve auto-positioning, rotational stability, and comfort of contact lenses by utilizing eyelid forces to adjust the contact lens orientation, reducing manufacturing complexity and costs compared to traditional designs.
Implementation Method 1
a deformable material at eye temperature
Implementation Method 2
the material forming the one or more dynamic stabilization zones redistributes and the entire dynamic stabilization zone flattens out
Data Source
AI summary
A contact lens incorporating one or more dynamic stabilization zones fabricated from a material that is readily deformable under eyelid pressure during blinking allows for the control over rotation of the contact lens on the eye. As the material deforms, the angle of contact between the eyelid and the one or more dynamic stabilization zones changes as does the rotational force acting on the contact lens.