Corrective Lens With Slotted Transmissive Region for Aberration Correction
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Solution Overview
Problem
Conventional corrective lenses fail to effectively correct severe eye aberrations, particularly in highly aberrated eyes with irregular corneas, such as keratoconus and post-refractive surgery ectasia, especially under dim light conditions.
Innovation Solution
A corrective lens design featuring a central opaque region with a slotted transmissive region that allows light transmission, improving retinal image quality by enhancing depth of focus and reducing aberration effects. The slotted transmissive region can be oriented horizontally, vertically, or diagonally, and its shape and position can be adjusted to suit individual eye needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional corrective lenses are used, then general vision correction is provided, but retinal image quality deteriorates in highly aberrated eyes under dim light conditions
Solution Approach 1:
The lens is segmented into distinct functional zones: a central opaque region that blocks aberrated light, a slotted transmissive region that allows corrected light passage, and surrounding transmissive areas. This segmentation enables different regions to perform different optical functions, improving retinal image quality by selectively blocking harmful aberrated rays while maintaining visual acuity through the slotted region.
Solution Approach 2:
Different regions of the lens are assigned different optical properties: the central region is opaque to block aberrated light, the slotted region is transmissive to allow corrected light, and the slot orientation and dimensions are locally optimized to address specific aberration patterns. This local differentiation of optical properties enables targeted correction of eye aberrations.
2Measurement precision
If wavefront-guided contact lenses are used, then aberration correction is improved, but lens positional stability requirement increases complexity
Solution Approach 1:
The lens incorporates an asymmetric slotted transmissive region with non-uniform dimensions and orientation rather than a symmetric circular aperture. The slot can be elongated in specific directions and positioned asymmetrically to compensate for dominant aberration patterns, providing effective aberration correction without requiring complex wavefront customization or precise lens positioning.
Solution Approach 2:
The lens design changes key optical parameters by introducing an opaque central region and a slotted transmissive aperture instead of a conventional clear lens design. These parameter changes simplify the overall lens structure while maintaining effective aberration correction, reducing the need for complex wavefront-guided customization and improving positional tolerance.
3Object-affected harmful factors
If a central opaque region is introduced, then aberration effects are reduced, but light transmission is partially blocked
Solution Approach 1:
Instead of completely blocking light with a solid opaque center, the design uses a slotted transmissive region that partially transmits light through the central area. This partial action allows sufficient light to pass for vision while still blocking the most aberrated rays, achieving an optimal balance between aberration reduction and light transmission for maintaining visual acuity.
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 corrective lens significantly improves retinal image quality and depth of focus for objects at various distances, effectively reducing the impact of eye aberrations, and can be tailored to meet the specific needs of patients with highly aberrated eyes.
Implementation Method 1
a slotted transmissive region formed in the central region, the slotted transmissive region allowing light transmission therethrough
Data Source
AI summary
A corrective lens for correcting aberrations of an eye of a patient includes a central region formed in the center of the corrective lens preventing light transmission. The corrective lens further includes a slotted transmissive region formed in the central region, the slotted transmissive region allowing light transmission therethrough.