Segmented Contact Lens Kit for Higher Order Aberration Correction
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Solution Overview
Problem
Current contact lenses are not designed to correct higher order aberrations, such as spherical aberration, which can either cancel or exacerbate existing eye aberrations, and there is a lack of standardized methods for selecting lenses with ideal spherical aberration values across different powers.
Innovation Solution
A kit of contact lenses with known higher order aberration values, including spherical, coma, and trefoil aberrations, allowing eye care practitioners to select and combine lenses to achieve desired residual aberration corrections, enabling same-day dispensing with targeted spherical aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If contact lenses are designed with fixed spherical aberration values for each power, then manufacturing and dispensing is simplified, but the ability to correct specific patient aberrations is reduced
Solution Approach 1:
The lens power range is segmented into multiple discrete powers, each with a predetermined spherical aberration value. This segmentation allows practitioners to select from aĉé set of options rather than requiring custom manufacturing for each patient, simplifying production while maintaining correction capability.
Solution Approach 2:
The invention changes the parameter of spherical aberration across different lens powers within the same product line. By deliberately designing lenses with varying spherical aberration values (positive, negative, or zero) at different powers, the system enables selection based on patient-specific aberration needs without custom manufacturing.
2Manufacturing precision
If custom lenses are manufactured for each patient's unique aberration profile, then correction precision is improved, but time and cost increase significantly
Solution Approach 1:
The manufacturer performs preliminary design and calculation of spherical aberration values for each lens power before the lenses are even produced. This advance preparation of aberration data allows practitioners to make informed selections without requiring time-consuming custom manufacturing or post-fitting measurements.
Solution Approach 2:
Instead of creating unique custom lenses for each patient, the invention provides a standardized set of lenses with predetermined aberration characteristics that can approximate various correction needs. This copying approach maintains adequate correction precision while dramatically reducing time and cost.
3Ease of operation
If lens spherical aberration varies across the power range, then some lenses may fortuitously cancel eye aberration, but consistent ideal correction cannot be guaranteed
Solution Approach 1:
The invention provides practitioners with knowledge of the spherical aberration value for each lens power, creating a feedback loop that guides selection. By understanding the aberration characteristics of available lenses, practitioners can make informed decisions to achieve desired correction, transforming a fortuitous process into a controlled one.
Data Source
AI summary
The present invention provides a kit of contact lenses, comprising two or more contact lenses having a known higher order aberration for each given lens power. By way of example, the higher order aberration may comprise a spherical aberration, a coma aberration, or a trefoil aberration. A practitioner selects a lens from the kit and applies the lens to a patient's eye and measures a residual higher order aberration of the lens-eye system. In cases where the residual higher order aberration exceeds a predetermined magnitude, the practitioner selects a second lens from the kit, applies the second lens to the patient's eye and measures the residual higher order aberration of the lens-eye system.