Microstructured Lens Element for Peripheral Myopia Control

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Solution Overview

Problem

Conventional single vision optical lenses fail to adequately correct peripheral vision, leading to inaccurate focusing on the peripheral retina, which can contribute to the progression of myopia or hyperopia, particularly in children using digital devices from a young age.

Innovation Solution

A lens element with a microstructured second zone that modifies optical power through refractive or diffractive lenslets, arranged in a predefined pattern, to control myopia or hyperopia by ensuring non-focalization of light on the peripheral retina, characterized by a specific measurable surface spatial power spectral density in a defined spatial frequency range.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional single vision optical lenses are used for foveal vision correction, then foveal vision is corrected, but peripheral vision focusing becomes inaccurate leading to myopia progression

Engineering Contradiction:

Improvefocusing accuracyVSAvoidperipheral vision correction

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The lens applies different optical properties to different zones: the first zone (central) provides standard refraction for foveal vision, while the second zone (peripheral) contains microstructures that modify light propagation to achieve non-focalization on the peripheral retina. This local differentiation allows simultaneous optimization of both central and peripheral vision correction

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The lens is divided into distinct functional zones: a first zone with standard refraction and a second zone with microstructured optical elements. This segmentation enables independent optimization of each zone's optical function, with the peripheral zone specifically designed to prevent myopia progression through controlled non-focalization

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If conventional lenses focus light on peripheral retina, then peripheral vision is clear, but myopia defect increases due to eye elongation

Engineering Contradiction:

Improveimage focus accuracyVSAvoidmyopia progression

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The microstructured second zone preemptively counteracts the harmful effect of light focalization on the peripheral retina by designing optical elements that deliberately non-focalize light in this zone. This preliminary anti-action prevents the eye elongation mechanism before it can occur, thereby stopping myopia progression at its root cause

Inventive Principle:

Principle #9Preliminary anti-action

3Reliability

If microstructured second zone is added for myopia control, then myopia progression is slowed, but lens complexity increases

Engineering Contradiction:

Improvemyopia control efficiencyVSAvoidlens structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention controls myopia progression by modifying optical parameters in the peripheral zone through microstructures with specific spatial frequency characteristics. By adjusting parameters such as spatial power spectral density within defined ranges (0.3-10 mm⁻¹), the lens achieves effective myopia control while maintaining manufacturability through standardized parameter specifications

Inventive Principle:

Principle #35Parameter changes

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 element effectively slows down the progression of myopia or hyperopia by improving focusing accuracy across the entire visual field, particularly in peripheral vision, using a microstructured zone with enhanced optical power modifications.

Implementation Method 1

at least one microstructured second zone outside said first zone and configured for myopia or hyperopia control... characterized by a measurable surface spatial power spectral density

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 2

configured for myopia or hyperopia control... modifying locally the optical power with respect to the refraction area

Methodology Applied

Scientific EffectDiffraction: Diffraction

Data Source

PatentUS20260050181A1Lens element

Publication Date: 2026.02.19 ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)

AI summary

A lens element in particular for a spectacle lens, a contact lens or an intraocular lens, intended to be worn by a wearer comprising: at least a first zone with a refraction area with a front face and a rear face, the refraction area having a refractive power based on a prescription for said eye of the wearer, at least one microstructured second zone outside said first zone and configured for myopia or hyperopia control, said microstructured second zone being characterized by a measurable surface spatial power spectral density.