Presbyopia Correction via Synergistic Lens Pairs
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Solution Overview
Problem
Conventional methods for correcting presbyopia, such as mono-vision, bifocal, and multifocal lenses, often result in reduced image contrast and resolution, loss of stereopsis, and require numerous lens combinations for satisfactory performance.
Innovation Solution
A method of producing contact lens pairs that satisfy specific relationships between binocular and monocular weighted ratios, ensuring improved binocularity and consistent performance in near, intermediate, and distance vision, using lenses with unique power profiles and spherical aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bifocal or multifocal contact lenses are used in both eyes, then presbyopia correction is achieved, but image contrast and resolution are reduced
Solution Approach 1:
The patent divides the correction task into two separate lenses with different power profiles rather than using bifocal/multifocal designs in both eyes. Each lens is optimized for specific visual requirements, segmenting the functional demands to maintain image quality while correcting presbyopia
Solution Approach 2:
The patent applies different power profiles to different lenses based on individual eye characteristics and visual needs. The first lens has a power profile optimized for one eye while the second lens has a different power profile tailored to the other eye, allowing local optimization of image quality for each eye
2Adaptability or versatility
If mono-vision is used with single vision lenses, then distance or near vision correction is achieved, but stereopsis is lost
Solution Approach 1:
The patent changes the parameters of the lenses by using different power profiles rather than simple single vision or bifocal designs. This allows the system to maintain binocular vision compatibility and preserve stereopsis while achieving presbyopia correction through optimized power distribution
3Adaptability or versatility
If bifocal or multifocal lens in one eye and single vision lens in other eye is used, then presbyopia correction is achieved, but the number of lens combinations to consider increases
Solution Approach 1:
The patent creates a universal system where lenses with different power profiles can be combined in various configurations to address presbyopia. The methodology provides a framework that works across multiple lens types and combinations, reducing the complexity of selection while maintaining versatility in correction approaches
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 method provides superior performance compared to conventional multifocal lenses by ensuring optimal correction and reduced design time, maintaining visual comfort and stereopsis while accommodating presbyopia.
Implementation Method 1
Lenses for the correction of presbyopia... single vision lens for correction of distance vision... single vision lens for correction of near vision
Data Source
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AI summary
The invention provides methods for designing contact lenses and contact lenses designed according to the method, which lenses provide an improved method for presbyopia correction compared to conventional lenses and methods. It is a discovery of the invention that improved performance and reduced design time can be obtained by using lens pairs that act synergistically to provide the lens wearer with good binocularity and consistent performance in near, intermediate and distance vision.