Activable Ophthalmic Lens for Refraction Progression Control
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Solution Overview
Problem
Conventional passive optical lenses for correcting abnormal refractions, such as myopia or hypermetropia, cause image superposition, reduce visual performance, and induce discomfort due to blur images and distortions, and lack adjustability in controlling refraction progression.
Innovation Solution
An ophthalmic lens with activable optical elements that switch between focusing an image on the retina and focusing it elsewhere, allowing adjustable control over refraction progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive optical lenses comprising optical elements are used to prevent or slow down abnormal refraction progression, then the progression of myopia or hyperopia is controlled, but visual comfort and performance are reduced due to image superposition, blur images, and distortions
Solution Approach 1:
The patent applies the dynamics principle by making the optical elements activable rather than permanently fixed. The optical elements can be activated or deactivated based on usage conditions, allowing the lens to dynamically adjust between providing refraction progression control and maintaining normal visual performance. This resolves the contradiction by enabling the system to switch states rather than being locked into a single compromising configuration.
Solution Approach 2:
The patent implements periodic action by allowing the optical elements to be activated during specific periods (e.g., during near work activities that promote myopia progression) and deactivated during other periods (e.g., during distance viewing or when progression control is not needed). This temporal modulation enables the system to provide refraction control only when necessary, thereby maintaining visual comfort during other times.
2Reliability
If optical elements are placed on the surface of the ophthalmic lens to control refraction progression, then abnormal refraction is prevented or slowed down, but the field of view is reduced and contrast sensitivity is lost
Solution Approach 1:
The activable nature of the optical elements allows the system to dynamically adjust the area occupied by these elements. When deactivated, the optical elements do not interfere with the full field of view. When activated, they occupy only the necessary portion of the visual field to provide refraction control, thereby minimizing the reduction in available viewing area.
Solution Approach 2:
The patent applies local quality by positioning the optical elements specifically in regions where they are most effective for controlling refraction progression, rather than uniformly across the entire lens surface. This localized placement minimizes the impact on the overall field of view while maintaining effectiveness in the critical zones for myopia control.
3Reliability
If optical elements are placed on the surface of the ophthalmic lens to control refraction progression, then abnormal refraction is prevented or slowed down, but distortions are induced that could lead to headaches
Solution Approach 1:
The activable optical elements allow the system to minimize harmful distortions by being deactivated when refraction control is not needed, thereby eliminating the source of visual distortions and potential headaches during periods when progression control is unnecessary.
Solution Approach 2:
The patent applies partial action by providing refraction progression control only to the extent necessary during specific activities, rather than continuously. This partial activation reduces the cumulative exposure to distortive effects that could cause headaches, while still achieving the therapeutic goal during critical periods.
4Reliability
If passive optical lenses are used to control refraction progression, then myopia or hyperopia progression is slowed down, but the amount of control cannot be adjusted or deactivated when not needed
Solution Approach 1:
The activable optical elements transform the static, fixed-control passive lens into a dynamic system that can adjust the amount and timing of refraction progression control. Users can activate or deactivate the optical elements based on their specific needs, activities, and environmental conditions, thereby achieving adaptability and versatility in the control functionality.
Solution Approach 2:
The patent implements parameter changes by allowing the optical properties of the lens to be modified on demand. The activation or deactivation of optical elements changes key parameters such as dioptric power distribution and optical path, enabling the system to adapt the degree of refraction control to match varying usage conditions and individual needs.
Data Source
AI summary
An ophthalmic lens intended to be worn in front of an eye of a wearer having a first optical function based on a prescription of the wearer for correcting an abnormal refraction of said eye of the wearer and comprising at least one activable optical element, wherein in a first state the at least one activable optical element contributes with the rest of the lens to focus the image of an object at distance on the retina, and in a second state the at least one activable optical element has a second optical function of not focusing an image on the retina of the eye of the wearer so as to slow down the progression of the abnormal refraction of the eye.