Multifunction Contact Lens for Myopia Progression Regulation
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Solution Overview
Problem
Current refractive error correction methods, such as corneal reshaping contact lenses, do not effectively regulate refractive error progression, particularly during daytime use, and may induce undesirable hyperopic defocus.
Innovation Solution
A multifunctional therapeutic optical device, specifically a contact lens with a central optical zone for reshaping the central cornea and a peripheral optical zone for modifying mid-peripheral optical power, providing refractive effects suitable for regulating refractive error progression during open-eye use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If corneal reshaping contact lenses are worn overnight to correct refractive error, then central vision is corrected, but peripheral retinal defocus is hyperopic which may stimulate axial elongation and progression of myopia
Solution Approach 1:
The contact lens is divided into distinct functional zones: a central optical zone for refractive error correction and a peripheral optical zone for controlling peripheral retinal defocus. This segmentation allows independent optimization of each zone's optical properties to achieve both central vision correction and myopia progression regulation
Solution Approach 2:
Different regions of the contact lens are assigned different optical powers tailored to their specific functions. The central zone provides the necessary refractive correction while the peripheral zone is designed with specific power characteristics to produce myopic defocus at the peripheral retina, creating locally optimized optical quality throughout the lens
2Reliability
If daytime wear contact lenses with central myopic corrective zones and mid-peripheral refractive zones are used to regulate myopic progression, then peripheral retinal defocus is improved, but continuous daytime wear is required and corneal reshaping benefit is lost
Solution Approach 1:
The lens combines two previously separate functions into a single device: corneal reshaping capability (typically associated with overnight wear) and peripheral retinal defocus control (typically associated with daytime wear). This merging allows the lens to provide both central corneal reshaping and peripheral optical zone effects that regulate myopia progression, eliminating the need for continuous daytime wear while maintaining both benefits
Solution Approach 2:
The contact lens is designed as a multifunctional device that simultaneously performs corneal reshaping for central vision correction and provides peripheral optical zone effects for myopia progression regulation. This multi-functionality allows a single lens worn overnight to achieve both refractive error correction and prevention of myopic progression, replacing the need for separate lenses worn at different times
3Reliability
If overnight corneal reshaping lenses are worn to correct myopia, then central vision is corrected during sleep, but no benefit for myopic progression regulation is provided during daytime activity
Solution Approach 1:
The lens performs preliminary corneal reshaping action during overnight wear to correct central refractive error, and simultaneously prepares the peripheral optical zone to provide myopic defocus during daytime activity. The peripheral optical zone is pre-configured in the lens design to automatically deliver the appropriate optical effect when the eye is active, ensuring both correction and progression regulation functions are achieved at the appropriate times
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 multifunctional contact lens achieves temporary refractive error correction for central vision and regulates refractive error progression by providing a peripheral refractive effect that focuses light appropriately on the peripheral retina, thereby reducing myopic progression and maintaining corrected vision without continuous lens wear.
Implementation Method 1
The multifunctional contact lens provides corrected central vision via reshaping of the central corneal tissue of an eye and provides modified mid-peripheral optical power by reshaping of the mid-peripheral cornea
Data Source
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AI summary
The present disclosure relates to therapeutic optical devices configured to provide corneal reshaping for correction of refractive errors of an eye, as well as a peripheral refractive effect on on-axis and/or off-axis light to provide regulation of refractive error development in the eye. Related methods for designing therapeutic optical devices and treatment of an eye with a multifunction therapeutic optical device are also provided.