Ophthalmic Lens Refractive Zones for Myopia Defocus Control

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Solution Overview

Problem

Conventional ophthalmic lenses for myopia correction, such as single-vision spherical lenses, cause hyperopic defocus leading to eye elongation and myopia progression, and lack effective myopia management/control without significantly affecting visual quality, with interindividual variability and compliance issues.

Innovation Solution

An ophthalmic lens design featuring a central portion with prescription power and multiple first and second refractive regions surrounding it, where the first regions have higher density and closer spacing, providing positive defocus to suppress myopia progression while maintaining clear vision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple micro-lenses are arranged on a single-vision spherical lens to form images in front of the retina, then myopia progression is suppressed, but visual quality is significantly affected

Engineering Contradiction:

Improvemyopia progression suppressionVSAvoidvisual quality degradation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The lens is divided into multiple functional zones: a central optical zone for clear vision and multiple peripheral defocus zones with micro-lenses for myopia control. This segmentation allows different regions to serve different functions, suppressing myopia progression while maintaining central visual quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the lens have different optical properties. The central portion has standard prescription power for clear vision, while the peripheral zones contain micro-lenses with specific defocus powers to control myopia progression. This local differentiation resolves the contradiction between myopia control and visual quality.

Inventive Principle:

Principle #3Local quality

2Reliability

If conventional single-vision spherical lenses are used for myopia correction, then myopia is corrected, but hyperopic defocus occurs causing eye elongation and myopia progression

Engineering Contradiction:

Improvemyopia correctionVSAvoidhyperopic defocus and eye elongation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful hyperopic defocus effect into a beneficial myopic defocus effect by adding micro-lenses in peripheral zones. These micro-lenses create intentional myopic defocus that counteracts the harmful hyperopic defocus and prevents eye elongation, turning a harmful optical effect into a protective one.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If myopia management lenses are designed with specific micro-lens arrangements, then axial elongation is inhibited, but interindividual variability and compliance issues arise

Engineering Contradiction:

Improveaxial elongation inhibitionVSAvoidinterindividual variability and compliance

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The lens design incorporates flexible parameters that can be adjusted to suit different individuals. The micro-lens arrangement, defocus powers, and zone configurations can be customized based on individual eye characteristics and myopia progression patterns, improving adaptability and compliance while maintaining axial elongation inhibition.

Inventive Principle:

Principle #15Dynamics

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 design effectively inhibits axial elongation of the eye, enhances patient compliance, and reduces interindividual variability by creating perceptible myopic defocus on the peripheral retina without significantly impacting visual quality.

Implementation Method 1

The multiple first refractive regions and multiple second refractive regions have different defocus powers from the prescription power

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS20260016706A1Ophthalmic Lenses and Frame Eyeglasses with such Lenses

Publication Date: 2026.01.15 ZHUHAI FITLENS MEDICAL TECH CO LTD

AI summary

The present application relates to an ophthalmic lens and frame eyeglasses comprising the lens. The ophthalmic lens includes a central portion, multiple first refractive regions, and multiple second refractive regions. The multiple first refractive regions are arranged in a first zone surrounding the central portion, while the multiple second refractive regions are arranged in a second zone farther away from the central portion compared to the first zone. The central portion has a prescription power based on the human eye, and the first and second refractive regions have different powers than the prescription power. Furthermore, the total area ratio of the multiple first refractive regions to the area of the first zone is greater than the total area ratio of the multiple second refractive regions to the area of the second zone. As a result, the present application allows for more effective management and control of myopia progression.