IRODR Spectacle Lens for Myopia Control via Reverse Galilean Optics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current anti-myopia progression spectacles, such as MyoVision and Myopilux, have limited efficacy in controlling myopia progression in children, with only partial effectiveness and specific conditions, necessitating an improved design that reduces accommodation demand and provides broader clinical efficacy.
Innovation Solution
The design of an Increased Resolvable Object Distance Range (IRODR) spectacle using modified reverse Galilean telescope lens elements, incorporating high-index lightweight materials, with a strong central refractive power and spatial refractive power distribution to optically push nearby objects further away and bring distant objects closer, inducing myopic defocus on the retina to control myopia progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anti-myopia progression spectacles (MyoVision, Myopilux) are used, then myopia progression control is achieved with limited efficacy, but the accommodation demand is not sufficiently reduced and clinical efficacy is restricted to specific groups of children
Solution Approach 1:
The spectacle lens is divided into multiple functional zones: a central zone with strong negative refractive power for distance vision, and peripheral zones with different refractive powers to create myopic defocus. This segmentation allows the lens to simultaneously address different visual needs and apply myopia control mechanisms effectively across various child groups.
Solution Approach 2:
Different regions of the lens are designed with locally optimized optical properties. The central zone has strong negative power for distance correction, while peripheral zones have varying powers to induce myopic defocus at specific locations on the retina, creating localized optical effects tailored to control myopia progression.
2Reliability
If contact lenses or Ortho-K are used to achieve extended depth of field and myopia control, then clinical efficacy is improved, but they are not suitable for young children who cannot safely wear them
Solution Approach 1:
The spectacle lens acts as an intermediary device that provides the myopia control effects normally achieved through contact lenses or Ortho-K, but in a format suitable for young children. The lens is mounted on glasses frames, eliminating the need for children to insert or remove contact lenses themselves.
Solution Approach 2:
The spectacle lens design serves multiple functions simultaneously: it corrects distance vision through the central negative zone, induces myopic defocus in peripheral zones to control myopia progression, and provides an extended depth of field. This multi-functionality makes it suitable for both children with myopia and presbyopic patients.
3Ease of operation
If reverse Galilean telescope lens elements are used with strong central refractive power, then the depth of field is increased and accommodation demand is reduced, but the lens design becomes more complex
Solution Approach 1:
The patent combines the reverse Galilean telescope optical configuration with multiple refractive zones in a single integrated lens design. The central negative zone and peripheral zones are merged into one lens element, eliminating the need for separate optical components and simplifying the overall device while maintaining the extended depth of field effect.
Solution Approach 2:
The lens design creates dynamic optical effects where the refractive power varies across different zones and at different object distances. The strong central negative zone dynamically adjusts the focus for distant objects, while peripheral zones dynamically create myopic defocus, adapting the optical effect based on the viewing condition.
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 IRODR spectacle effectively increases the depth of field, reduces accommodative stress, and slows myopia progression by maintaining objects in focus over a larger distance range without significant image size change, offering improved efficacy comparable to high-performance contact lenses or Ortho-K approaches.
Implementation Method 1
modified and rearranged lens elements from a reverse Galilean telescope can be incorporated into a wearable Increased Resolvable Object Distance Range (IRODR) spectacle
Implementation Method 2
optically induce paracentral and/or peripheral myopic defocus on the retina, i.e. with sharply focused image of a distant object formed on the fovea or macula, and with paracentral and/or peripheral image shell of a distant off axis object formed in front of the retina
Data Source
AI summary
A wearable optical device increases a Resolvable Object Distance Range (RODR) thereby reducing focusing demands of a plurality of objects located along a visual angle distance for a user with presbyopia or myopia. The devise includes a negative refractive element and a positive refractive element located along an optical axis. The negative refractive element and the positive refractive element are separated from each other by a separation space and at a separation distance suitable for mounting on a spectacle. A surface of a non-central zone of the negative refractive element or the positive refractive element is a Fresnel surface. The separation space is filled by an intermediate media with a refractive index lower than that of the negative refractive element or the positive refractive element. In one embodiment, the intermediate media is an optical grade resin or polymer. In another embodiment, a spacing seal is located around a periphery of the separation space, and the intermediate media is a low-humidity gas for reducing condensation within the separation space during ambient temperature changes.