Ophthalmic Spectral Filtering With Microlenses for Myopia Control
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Solution Overview
Problem
Existing methods for controlling myopia progression, such as microlenses, aspherical lenses, and diffusing elements, are not sufficiently effective, and there is a need for more efficient solutions that do not cause vision discomfort.
Innovation Solution
An ophthalmic set with spectral filtering means that selectively reduce light intensity in the 440-520 nm and 560-600 nm ranges, combined with wavefront modifying means like microlenses or light-diffusing elements, to control myopia progression while maintaining vision comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spectral filtering means are used to block blue-green light (440-520 nm) to control myopia progression, then myopia progression control is improved, but vision transmission and color rendering deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the transmission characteristics of spectral filtering means. It specifies that average transmission over 440-520 nm must be ≤50% (ideally 10-30%) while maintaining overall vision transmission Tv≥70%. This selective parameter optimization allows blocking myopia-inducing blue-green light while preserving sufficient visible light transmission for comfortable vision and color rendering.
2Reliability
If spectral filtering means with high blue-green light blocking are used, then myopia progression control is improved, but color rendering deteriorates
Solution Approach 1:
The patent resolves this contradiction by defining specific transmission parameter ranges: average transmission over 440-520 nm should be between 10% and 30% (not simply ≤50%), and overall vision transmission Tv should be ≥70%. These optimized parameters ensure sufficient color rendering while maintaining effective myopia control. The patent also specifies complementary color temperature ranges (2000K-10000K) to further optimize color rendering.
3Reliability
If spectral filtering means are used to control myopia progression, then myopia control efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing spectral filtering means that can be integrated into various existing ophthalmic devices (spectacles, contact lenses, intraocular lenses). The filtering means serves multiple functions: controlling myopia progression, maintaining vision transmission, and preserving color rendering, without requiring completely new device architectures. This multi-functionality approach reduces overall system complexity.
4Reliability
If spectral filtering means with strict transmission criteria are used, then myopia progression control is improved, but ease of operation deteriorates due to vision discomfort
Solution Approach 1:
The patent resolves this contradiction by optimizing transmission parameters to balance myopia control with visual comfort. It specifies that overall vision transmission Tv must be ≥70% and average transmission over 440-520 nm should be between 10% and 30%. These parameter ranges ensure sufficient light reaches the eye for comfortable vision while maintaining effective myopia progression control, preventing vision discomfort.
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 ophthalmic set effectively slows down myopia progression by matching circadian rhythms, improving color rendering, and maintaining visual acuity and cosmetic appearance.
Implementation Method 1
spectral filtering means arranged for being effective on light that enters a user's eye... average transmission value assessed over the spectral range from 460 nm to 510 nm, or 440 nm to 520 nm, that is equal to or less than 50%, preferably less than 30%
Data Source
AI summary
An ophthalmic set for myopia progression control comprises spectral filtering means arranged for being effective on light that enters a user's eye. The spectral filtering means selectively reduce blue-green light intensity, and possibly also amber light intensity. Preferably, said spectral filtering means are combined with wavefront modifying means within the ophthalmic set for increased efficiency in slowing-down myopia progression for the user. In possible embodiments, the spectral filtering means and wavefront modifying means are combined in spectacle lenses (1, 2), and the wavefront modifying means are comprised of microlenses (21) or light-diffusing elements.