Myopia Control Spectacle Lens with Peripheral Light Scattering
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Solution Overview
Problem
Current therapies are ineffective in reducing or controlling the progression of myopia in children, with no approved treatments in the United States to slow or stop the eye-lengthening growth associated with myopia progression.
Innovation Solution
The use of myopia control spectacle lenses, which include features such as light scattering dots or defocus elements, designed to reduce myopia progression by altering visual acuity and image contrast, thereby slowing eye growth in children.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If myopia control spectacle lenses with light scattering features are used, then myopia progression is reduced, but visual acuity in peripheral regions is degraded
Solution Approach 1:
The lens applies different optical properties to different regions: the central region maintains high visual acuity for clear vision, while the peripheral regions contain light scattering features to reduce myopia progression. This local differentiation resolves the contradiction by allowing each region to serve its specific function without compromising the other.
Solution Approach 2:
The lens is divided into distinct functional zones: a central clear aperture for high-acuity vision and peripheral annular regions with light scattering features. This segmentation allows the lens to simultaneously provide clear central vision while inducing peripheral defocus to slow eye growth and reduce myopia progression.
2Measurement precision
If conventional single vision lenses are used, then visual acuity is maintained, but myopia progression is not controlled
Solution Approach 1:
The lens merges two previously separate functions into a single optical element: correction of refractive error for clear vision and induction of peripheral defocus to control myopia progression. This combination allows both visual acuity maintenance and myopia progression control to be achieved simultaneously through one device.
Solution Approach 2:
The spectacle lens serves multiple functions: it corrects refractive error to provide clear vision like a conventional lens, and simultaneously controls myopia progression through peripheral light scattering features. This multi-functionality resolves the contradiction by making a single lens capable of both tasks that were previously performed by separate interventions.
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 myopia control spectacle lenses effectively reduce myopia progression by 0.4 D or more after three years, 0.3 D or more after two years, and 0.15 diopters or more after one year, compared to control groups, while maintaining normal visual acuity in the central region and reducing it in the peripheral region.
Implementation Method 1
The scattering centers can be sized and shaped to scatter incident light
Data Source
AI summary
Methods and devices for treating a human child having myopia are disclosed. For example, a human child having myopia can be treated by wearing spectacles having one or two myopia control spectacle lenses.