Myopia Control Lens Element With Peripheral Defocus Zones
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Solution Overview
Problem
Conventional single vision optical lenses fail to adequately correct focusing defects in children, particularly when viewing objects at short distances, leading to increased progression of myopia due to inaccurate focusing on the peripheral retina.
Innovation Solution
A lens element with a first and second set of optical elements providing cumulative optical effects, where the first set contributes to a focus shift in peripheral retina zones and the second set counteracts this shift in central retina zones, optimizing visual correction and controlling myopia progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional single vision optical lenses are used to correct far vision, then far vision correction is improved, but near vision focusing accuracy deteriorates and myopia progression increases
Solution Approach 1:
The lens element applies different optical properties to different zones: the central zone provides standard refraction for foveal vision, while the peripheral zone introduces defocusing effect for myopia control. This local differentiation allows the lens to simultaneously address central vision clarity and peripheral myopia progression.
Solution Approach 2:
The lens is divided into distinct functional zones including a central zone for standard correction and a peripheral zone for defocusing. This segmentation enables independent optimization of each zone's optical function to address different visual needs.
2Measurement precision
If the correction is optimized for foveal vision, then central vision sharpness is improved, but peripheral vision focusing deteriorates causing myopia progression
Solution Approach 1:
The lens element applies different optical properties to different zones: the central zone provides standard refraction for foveal vision, while the peripheral zone introduces defocusing effect for myopia control. This local differentiation allows the lens to simultaneously address central vision clarity and peripheral myopia progression.
Solution Approach 2:
The lens converts the harmful effect of peripheral focusing (which causes myopia progression) into a beneficial defocusing effect. By intentionally designing the peripheral zone to produce light focus in front of the retina, the lens transforms the problematic peripheral focusing into a therapeutic mechanism for controlling myopia.
3Ease of operation
If conventional lenses focus light on the peripheral retina, then peripheral vision is improved, but the eye elongates causing myopia defect to increase
Solution Approach 1:
The lens converts the harmful effect of peripheral focusing (which causes myopia progression) into a beneficial defocusing effect. By intentionally designing the peripheral zone to produce light focus in front of the retina, the lens transforms the problematic peripheral focusing into a therapeutic mechanism for controlling myopia.
Solution Approach 2:
The lens applies a preliminary defocusing action in the peripheral zone to counteract the natural tendency of the eye to elongate when exposed to focused peripheral light. This preemptive optical intervention prevents the harmful adaptive response of eye growth before it occurs.
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 achieves optimized visual sharpness in the foveal zone while defocusing in peripheral zones, effectively controlling myopia progression by shifting the focus upstream of the retina.
Implementation Method 1
an optical element of the first set is located at a greater distance from the centre of rotation of the eye than an optical element of the second set, at least some of the optical elements of the first set and the second set are disposed in a mutual relationship in such a way that, for at least one gaze direction, a first and a second cumulative optical effect are provided at the same time for respective at least first and second incoming light beams: the first optical cumulative effect is provided for said first incoming light beam impinging in peripheral zones of the retina of the wearer and comprises a contribution to a focus shift
Implementation Method 2
the second optical cumulative effect is provided for said second incoming light beam impinging in the central zone of the retina of the wearer and comprises a contribution to at least partly or completely counter focus shift a focus shift induced by the first optical function of the first set of optical elements by optical elements of the second set
Implementation Method 3
a lens element intended to be worn in front of an eye of a wearer comprising at least a first and a second set of optical elements providing respectively a first and a second optical function
Data Source
AI summary
A lens element intended to be worn in front of an eye of a wearer having at least a first and a second set of optical elements providing respectively a first and a second optical function. When worn by a wearer, an optical element of the first set is located at a greater distance from the center of rotation of the eye than an optical element of the second set. At least some of the optical elements of the first set and the second set are disposed in a mutual relationship in such a way that, for at least one gaze direction, a first and a second cumulative optical effect are provided at the same time for respective at least first and second incoming light beams.