Off-Center Magnification Lens Layout for Reduced Peripheral Distortion
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Solution Overview
Problem
Conventional reading glasses with uniform thickness and optical power cause distorted vision in peripheral regions due to a single optical power throughout the lens, failing to address the varying needs of different viewing areas.
Innovation Solution
Eyewear lenses with multiple magnification regions, where higher magnification is centered offset from the geometric center, varying in diopter ratings from 2.65 to 0.0 diopters, and configured to align with the human eye's natural viewing habits, reducing distortion and strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional reading glasses use uniform thickness and single optical power throughout the lens, then manufacturing is simple and cost-effective, but vision distortion occurs in peripheral regions
Solution Approach 1:
The lens is divided into multiple regions with different optical powers: a central region with higher optical power for near vision and peripheral regions with lower optical power for intermediate and distance vision. This local differentiation allows each region to optimize vision quality for its specific viewing distance, eliminating the peripheral distortion problem while maintaining manufacturability through progressive gradient designs.
Solution Approach 2:
The lens is segmented into distinct optical zones including a central high-power region, intermediate gradient regions, and peripheral low-power regions. Each segment serves a specific visual function, allowing the lens to address multiple viewing distances simultaneously without requiring multiple separate lenses or complex adjustments.
2Manufacturing precision
If conventional reading glasses provide clear vision in the central area with single optical power, then the lens structure remains simple, but distorted vision occurs in peripheral areas
Solution Approach 1:
Different regions of the lens are assigned different optical properties: the central region maintains high optical power for reading and near work, while peripheral regions gradually transition to lower optical powers for intermediate and distance viewing. This local quality differentiation ensures that each viewing zone provides optimized vision without compromising overall lens simplicity.
Solution Approach 2:
The lens incorporates dynamic optical properties through progressive gradient designs where optical power changes continuously across the lens surface. This allows the lens to adapt to different viewing distances and angles dynamically, providing clear vision whether the user is looking straight ahead or peripherally, thereby improving ease of operation.
3Device complexity
If the lens has a single optical power throughout, then the lens design is simple and uniform, but it fails to address varying magnification needs of different viewing areas
Solution Approach 1:
The lens implements local quality by assigning different optical powers to different spatial regions: high power in the center for near vision, intermediate power in transition zones, and low power at periphery for distance vision. This allows a single lens to provide adaptability for multiple viewing distances while maintaining relatively simple manufacturing processes and design procedures.
Solution Approach 2:
The progressive gradient lens achieves multi-functionality by incorporating multiple optical powers within a single lens structure. This allows the lens to serve multiple functions: reading, computer work, and distance viewing, all through one lens without requiring the user to switch between different prescription glasses for different tasks.
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 lenses provide sharp vision with reduced distortion by aligning higher magnification regions with the user's common line of sight, minimizing eye strain and enhancing comfort during extended use.
Implementation Method 1
The optical lens includes a plurality of magnification regions, with each magnification region extending between the inner surface and the outer surface and being associated with a respective minimum magnification magnitude
Data Source
AI summary
An optical lens for use with an eyewear frame includes an inner surface and an outer surface, with the lens being configured to be positionable adjacent a wearer's eye to enable viewing through both the inner and outer surfaces of the lens. The optical lens additionally includes a plurality of magnification regions, with each magnification region extending between the inner surface and the outer surface and being associated with a respective minimum magnification magnitude and a respective peripheral boundary. The peripheral boundaries for the plurality of magnification regions are disposed about a common center of magnification. The lens includes a geometric center residing on at least one of a longitudinal midline of the lens or a latitudinal midline of the lens, with the center of magnification being offset from the geometric center.