Spectacles Lens With Segmented Channel For Myopia Control
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Solution Overview
Problem
Existing spectacle lenses for myopia correction suffer from decreasing wearing comfort and tolerability as myopia progresses, with current solutions being complex, expensive, and inflexible, often impairing foveal vision and requiring frequent prescription changes.
Innovation Solution
A spectacle lens design featuring a continuous channel area with increasing refractive power towards an effective area, leaving specific peripheral areas free to enhance comfort and effectiveness, with a balanced distribution of prescription and non-prescription zones to minimize distortion and myopia progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peripheral power is added to shift the focal plane in front of the retina, then myopia progression is slowed, but optical comfort and field of sharp vision deteriorate
Solution Approach 1:
The lens is divided into distinct functional zones: a central channel area for sharp vision with stable refractive power, and peripheral effective areas for myopia control with increased power. This segmentation allows each zone to perform its specific function without compromising the other, resolving the contradiction between myopia control effectiveness and optical comfort.
Solution Approach 2:
Different regions of the lens are assigned different optical properties: the channel area maintains prescription power for clear central vision, while the peripheral effective areas have elevated power (e.g., +2.00D to +4.00D) to create the necessary defocus for myopia control. This local differentiation enables simultaneous achievement of comfort and effectiveness.
2Reliability
If peripheral power is increased to slow myopia progression, then the field of sharp vision is reduced, but this limits the lens's practical utility
Solution Approach 1:
The lens aperture is segmented into a central channel area that preserves sharp vision and peripheral effective areas for myopia control. The channel area maintains the patient's prescription power, ensuring a sufficient field of sharp vision for comfortable viewing, while the peripheral zones implement the power elevation needed for myopia progression control.
Solution Approach 2:
Instead of applying power elevation across the entire lens, the invention applies it only partially to specific peripheral zones. The channel area remains free from excessive power addition, preserving sharp vision where needed, while peripheral areas receive the excessive power necessary for myopia control. This partial application resolves the contradiction between field of sharp vision and myopia control effectiveness.
3Ease of operation
If conventional single-vision lenses are used, then wearing comfort is maintained, but myopia progression continues unchecked
Solution Approach 1:
The lens transitions from uniform single-vision design to a differentiated structure where the central channel area maintains prescription power for comfortable viewing, while peripheral effective areas have elevated power to create defocus for myopia control. This local quality differentiation enables the lens to simultaneously provide wearing comfort and myopia progression control.
4Reliability
If existing myopia control lenses are designed with extensive peripheral power, then myopia progression is slowed, but distortion and motion blur increase
Solution Approach 1:
The lens is segmented to concentrate peripheral power elevation only in specific effective areas while maintaining a clear channel area. This segmentation prevents excessive power distribution across the entire lens, thereby reducing the generation of distortion and motion blur artifacts while preserving myopia control effectiveness in the peripheral zones.
Solution Approach 2:
By assigning different optical qualities to different regions - stable prescription power in the channel area and elevated power in peripheral effective areas - the lens minimizes optical aberrations and distortion that would otherwise occur with uniform peripheral power addition, while maintaining the necessary defocus for myopia control.
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 lens provides enhanced wearing comfort and improved perception by enlarging the field of sharp vision while significantly reducing distortion and myopia progression, maintaining comfort and effectiveness over time.
Implementation Method 1
The refractive power of the spectacle lens increases on both sides of the channel area towards the effective area
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to a spectacles lens (10) having a specifically shaped peripheral region having differing optical properties for improving long-term wearing comfort while simultaneously improving perception. In particular, the spectacles lens (10) comprises: - a continuous channel region (12), which extends continuously from an upper edge (14) to a lower edge (16) of the spectacles lens; and - an active region (18n, 18t) which horizontally adjoins the continuous channel region (12) on both sides and extends continuously from the upper edge (14) to the lower edge (16) of the spectacles lens (10), wherein the refractive power of the spectacles lens (10) increases from the channel region (12) to the active region (18n, 18t) on both sides of the channel region (12).