Contact Lens Diopter Segmentation and Light Control
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Solution Overview
Problem
Conventional contact lenses with vision control functions experience discomfort due to drastic diopter changes away from the central region, leading to poor treatment efficacy and discomfort for wearers, along with issues related to light control, causing photophobia or unclear images.
Innovation Solution
A contact lens design featuring a central region, an annular region, and a peripheral region with specific diopter distributions and critical points, including color patterns and light blocking rings, to moderate diopter changes and control light entry effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diopter is increased rapidly away from the central region in conventional contact lens design, then the vision control function is enhanced, but the wearer experiences severe discomfort
Solution Approach 1:
The contact lens is divided into multiple regions (central region, intermediate region, and peripheral region) with progressively changing diopter values. This segmentation allows the diopter to increase gradually across different zones rather than abruptly, maintaining vision control effectiveness while reducing wearer discomfort through staged optical power transitions.
Solution Approach 2:
Different regions of the contact lens are assigned different diopter characteristics tailored to their specific functions. The central region provides base correction, the intermediate region transitions power, and the peripheral region provides maximum defocus. This local differentiation optimizes both vision control in each zone and overall comfort by matching optical properties to regional needs.
2Adaptability or versatility
If small concave grooves are disposed on the contact lens surface for identification, then side and reverse observation is enabled, but the contact lens tends to break
Solution Approach 1:
The identification function is extracted from the traditional concave groove structure and implemented through color patterns or markings on the contact lens surface. This extraction removes the structural weakness caused by grooves while preserving the identification capability, allowing the lens to maintain full structural integrity without compromising its ability to indicate correct orientation.
3Adaptability or versatility
If small protruding dots are disposed on the contact lens surface for identification, then side and reverse observation is enabled, but severe foreign body sensation is caused
Solution Approach 1:
The identification function is extracted from protruding surface elements and implemented through color patterns or optical markings. This removes the physical protrusions that cause foreign body sensation while maintaining the identification capability through visual cues that do not contact the eye surface, thereby eliminating discomfort.
4Illumination intensity
If the amount of entering light rays is excessively increased, then sufficient illumination is provided, but photophobia is caused
Solution Approach 1:
The contact lens implements local quality control for light management by creating specific zones with different optical densities. Certain regions allow full light transmission for clear vision, while other zones provide reduced transmission to control overall light entry. This spatial differentiation of light properties prevents photophobia while maintaining adequate illumination for image clarity.
Data Source
AI summary
A contact lens includes a central region, an annular region and a peripheral region. The central region includes a central point of the contact lens. The annular region symmetrically surrounds the central region. The peripheral region symmetrically surrounds the annular region. The peripheral region includes at least one color pattern portion. The annular region includes at least one power of critical point.