Ophthalmic Lens Annular Zones for Peripheral Myopia Control
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Solution Overview
Problem
Myopia, or nearsightedness, is a growing optical condition that often develops during childhood and progresses until age 20, increasing the risk of other optical maladies such as cataracts and retinal detachment, and current treatments like LASIK are not well-suited for many myopic individuals.
Innovation Solution
Ophthalmic lenses with annular zones that provide myopia-inhibiting wavefront corrections to light incident on the peripheral retina, reducing the circumferential-to-radial aspect ratio of peripheral vision images through positive sphere corrections and subsurface refractive index variations, and optionally incorporating atropine as a myopia-inhibiting compound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional LASIK or laser refractive surgery is performed on myopic individuals, then central vision correction is achieved, but the treatment is not well-suited for many myopic individuals and does not address peripheral retinal image quality
Solution Approach 1:
The ophthalmic lens implements different optical corrections in different zones: the central zone provides conventional refractive correction for distance vision, while the peripheral annular zone provides myopia-inhibiting wavefront correction with positive sphere power and reduced circumferential-to-radial aspect ratio. This local differentiation allows the lens to address both central vision needs and peripheral retinal image quality simultaneously, making it suitable for myopic individuals who require both types of correction.
2Reliability
If the ophthalmic lens provides comprehensive wavefront correction for peripheral retina, then myopia progression is inhibited, but the lens design and manufacturing complexity increases
Solution Approach 1:
The ophthalmic lens is divided into distinct functional zones: a central zone for conventional refractive correction and a peripheral annular zone for myopia-inhibiting wavefront correction. This segmentation allows each zone to be optimized independently for its specific function, simplifying the overall design process while achieving comprehensive correction. The annular zone is further characterized by specific optical parameters (positive sphere power, reduced circumferential-to-radial aspect ratio) that can be calculated and manufactured using established techniques.
Solution Approach 2:
The patent applies specific parameter changes to the peripheral zone of the lens, including introducing positive sphere power (e.g., +0.50 to +2.00 diopters) and reducing the circumferential-to-radial aspect ratio of peripheral images. These parameter modifications are designed to create myopic defocus in the peripheral retina, which inhibits eye growth and myopia progression. The parameters can be customized based on individual patient needs while following established optical principles.
3Reliability
If atropine is incorporated into the ophthalmic lens for myopia inhibition, then treatment effectiveness is enhanced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The ophthalmic lens combines optical material with pharmacological agent (atropine) to create a composite treatment system. The atropine is incorporated into the lens matrix or applied to the lens surface, allowing simultaneous delivery of optical correction and pharmacological myopia inhibition. This composite approach enhances treatment effectiveness by addressing both optical and biochemical mechanisms of myopia control while using established contact lens manufacturing techniques for drug incorporation.
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
These lenses effectively inhibit the progression of myopia by modifying peripheral retinal images, reducing image blur anisotropy and providing customized wavefront corrections to mitigate optical aberrations, thereby potentially reducing the risk of associated conditions.
Implementation Method 1
an annular zone, configured to provide a myopia mitigating wavefront correction to light incident on the peripheral retina
Implementation Method 2
provide a first myopia inhibiting wavefront correction to light from a first peripheral vision region
Implementation Method 3
the first myopia inhibiting wavefront correction includes a positive sphere correction to the light from the first peripheral vision region that passes through the first annular sector
Implementation Method 4
reducing image blur anisotropy and providing customized wavefront corrections to mitigate optical aberrations
Data Source
AI summary
Methods of inhibiting progression of myopia apply myopia inhibiting wavefront corrections to light incident on the peripheral retina. A method of inhibiting progression of myopia includes applying a myopia inhibiting wavefront correction to light from a peripheral vision region. An annular sector of an ophthalmic lens is configured so that light from the peripheral vision region forms an image on an annular region of the peripheral retina. The myopia inhibiting wavefront correction is configured to reduce a circumferential-to-radial aspect ratio of the image.