Fractal Microstructure Spectacle Lens for Sustained Myopia Control
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Solution Overview
Problem
Existing myopia control lenses based on optical defocus and peripheral contrast theories have limited effectiveness due to geometric consistency and insufficient visual perturbation, leading to neural adaptation and reduced control efficiency over time.
Innovation Solution
A myopia prevention and control spectacle lens with fractal microstructures that utilize optical phase chaos technology, featuring fractal curves or patterns in the peripheral zone to create complex and unpredictable optical interference, disrupting the retina's ability to determine eye growth direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional geometric microstructures are used in myopia control lenses, then the lens can provide optical defocus and peripheral contrast effects, but the visual perturbation is insufficient leading to neural adaptation and reduced control efficiency over time
Solution Approach 1:
The patent applies asymmetry by using fractal curves with non-integer dimensions (e.g., Koch snowflake with dimension ≈1.26) instead of conventional symmetric geometric shapes. This creates irregular, self-similar patterns that produce complex optical phase chaos, preventing the visual system from adapting to regular geometric patterns while maintaining optical defocus and peripheral contrast effects for sustained myopia control effectiveness
Solution Approach 2:
The patent changes the fundamental parameter of microstructure geometry from conventional integer-dimensional shapes (lines, circles, squares) to fractal curves with non-integer dimensions. This parameter change creates optical phase chaos with complex light scattering patterns that provide sustained visual perturbation, preventing neural adaptation and maintaining control efficiency over extended periods
2Ease of manufacture
If regular geometric patterns are used in the peripheral zone, then the lens structure is simple to manufacture, but the visual experience is similar in different directions providing insufficient optical perturbation
Solution Approach 1:
The patent segments the peripheral zone into multiple fractal curve patterns (e.g., different Koch snowflakes, Sierpinski triangles) with varying orientations and scales. This segmentation creates directionally diverse optical perturbation while maintaining manufacturability through standardized fractal fabrication processes, overcoming the limitation of regular geometric patterns that provide uniform visual experience in all directions
Solution Approach 2:
The patent introduces fractal dimension (non-integer dimension) as an additional dimensional parameter beyond conventional 1D lines, 2D planes, and 3D volumes. This dimensional change enables complex optical perturbation with self-similar patterns at multiple scales, creating directionally varied visual experiences while maintaining manufacturing feasibility through scalable fractal fabrication methods
3Reliability
If fractal microstructures are used to create optical phase chaos, then the visual perturbation is enhanced and neural adaptation is prevented, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs nested fractal structures where smaller fractal patterns are embedded within larger fractal patterns (e.g., Koch snowflakes within Sierpinski triangles). This nesting creates multi-scale optical perturbation that enhances control effectiveness while the self-similar nature of fractals allows for scalable manufacturing processes that reduce precision requirements compared to non-fractal complex patterns
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
Enhances myopia control by providing unique visual experiences in different directions, effectively interfering with myopia progression and maintaining efficacy over time.
Implementation Method 1
fractal microstructures that utilize optical phase chaos technology, featuring fractal curves or patterns in the peripheral zone to create complex and unpredictable optical interference
Implementation Method 2
fractal curves or patterns in the peripheral zone to create complex and unpredictable optical interference
Data Source
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AI summary
The discloure provides a myopia prevention and control spectacle lens with fractal microstructure, which belongs to the design and processing technical field of optical lenses. The spectacle lens comprises a lens base, on which an optical zone and a control zone are provided. The optical zone includes a central optical zone, which is a region with a radius of R1 centered at the central position of the spectacle lens. The control zone surrounds the outer side of the central optical zone. In the control zone, there are microstructures formed by fractal curves or fractal patterns on the plane of the lens base, or microstructures formed by fractal curves or fractal patterns between the layers of the lens base. The present discloure enhances the degree of optical perturbation by increasing the complexity of the peripheral microstructures as much as possible, thereby interfering with the process of myopia progression.