Segmented Spectacle Lens for Amblyopia Vision Reduction
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Solution Overview
Problem
Existing treatments for unilateral amblyopia, such as eye patches and Bangerter filters, cause discomfort, hinder stereoscopic vision development, and impair aesthetic appearance, while single vision lenses risk strabismus or amblyopia.
Innovation Solution
A spectacle lens with segment regions that converge light beams off the retina and a non-segment region ratio of 0-25%, arranged with periodicity and specific size and spacing, to decrease visual acuity effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a Bangerter filter is used to decrease visual acuity of the healthy eye, then the visual acuity is decreased, but the aesthetic appearance is impaired and the patient feels reluctant to wear the glasses
Solution Approach 1:
The lens is divided into multiple segment regions with different optical powers arranged in a specific pattern. These segment regions create a mosaic effect that decreases visual acuity while maintaining overall lens transparency and aesthetic appearance, unlike the uniform frosted appearance of Bangerter filters
Solution Approach 2:
Different regions of the lens have different optical properties - some regions have higher power to decrease visual acuity, while other regions maintain normal transparency. This local variation in optical quality achieves the therapeutic effect while preserving aesthetic appearance
2Measurement precision
If a single vision lens with different power is used to respond to decrease in visual acuity, then the visual acuity is decreased, but the balance of collision congestion control collapses, resulting in strabismus or amblyopia
Solution Approach 1:
The lens contains multiple segment regions with different optical powers distributed across the lens surface. This segmentation allows the lens to decrease visual acuity through the mosaic effect while maintaining overall optical balance and preventing disruption of collision congestion control
Solution Approach 2:
The lens uses controlled variations in optical power parameters across different segment regions. By carefully designing the distribution and magnitude of these parameter changes, the lens achieves visual acuity decrease while maintaining binocular vision balance
3Measurement precision
If an eye patch is used to completely cover the healthy eye, then the visual acuity is decreased, but the patient experiences pain and discomfort when worn for long periods
Solution Approach 1:
The invention extracts the visual acuity decreasing function from the mechanical eye patch and implements it through optical means in the lens. This eliminates the need for physical contact with the eye, removing the source of pain and discomfort while maintaining the therapeutic effect
Solution Approach 2:
The mechanical eye patch system is replaced with an optical lens system. Instead of physically blocking light with a patch, the lens uses optical power variations to decrease visual acuity, providing a more comfortable and sustainable treatment approach
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 therapeutic effect for unilateral amblyopia by reducing visual acuity without causing discomfort or aesthetic issues, while maintaining balanced binocular vision and appearance.
Implementation Method 1
a plurality of segment regions 11 which cause a light beam incident from an object-side surface to exit from an eyeball-side surface and to converge on a position other than on a retina
Data Source
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AI summary
There is provided a spectacle lens 10 including a plurality of segment regions 11 that cause a light beam incident from an object-side surface to exit from an eyeball-side surface and to converge on a position other than on a retina of an eyeball of a spectacle wearer, wherein the plurality of segment regions 11 are configured to achieve a vision value equal to or lower than a predetermined vision limit value; and an area ratio of non-segment regions with respect to a combined region of the plurality of segment regions and the non-segment regions other than the segment regions is 0% or more and 25% or less.