Variable-Focus Lens Control for Gradual Myopia Suppression
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Solution Overview
Problem
Existing variable focus lens technologies are inadequate in effectively suppressing the progression of near-sightedness and other eye abnormalities by failing to provide a gradual and imperceptible change in focal length, leading to user discomfort and reduced effectiveness.
Innovation Solution
A variable-focus-lens control apparatus that controls the focal length of a variable focus lens to change continuously or stepwise, with a slow and imperceptible rate, to relax or contract the ciliary muscle of the eye, thereby suppressing the progression of near-sightedness and other eye abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the focal length of the variable focus lens is changed rapidly between in-focus and out-of-focus states, then the myopia suppression effect is achieved by forcing the user to observe imperceptible momentary defocus, but the user may feel discomfort or fatigue due to the rapid focal length changes
Solution Approach 1:
The patent applies dynamics by transitioning from static focal length settings to dynamic continuous variation. The focal length is varied continuously over time within a specific range (e.g., ±0.5D to ±2.0D) at a controlled rate (e.g., 0.05D/sec to 0.2D/sec), creating a dynamic optical environment that stimulates the ciliary muscle without causing user discomfort. This dynamic approach allows the eye to adapt gradually while maintaining the myopia suppression effect.
Solution Approach 2:
The patent utilizes parameter changes by systematically varying the focal length parameter within an optimized range. The focal length is changed continuously within a specific diopter range (e.g., ±0.5D to ±2.0D) at a controlled rate, which has been determined to be effective for myopia suppression while remaining imperceptible to users. This parameter optimization resolves the contradiction by finding the sweet spot between effectiveness and comfort.
2Ease of operation
If the focal length changes are made more gradual and imperceptible, then user comfort is improved, but the effectiveness in stimulating the ciliary muscle to suppress myopia progression may be reduced
Solution Approach 1:
The patent applies periodic action by implementing continuous focal length variation that cycles through a predetermined range. The focal length oscillates between maximum and minimum values (e.g., +2.0D to -2.0D) over a specific time period (e.g., several seconds to minutes), creating periodic stimulation of the ciliary muscle. This periodic dynamic variation maintains effectiveness while ensuring the changes remain imperceptible to users, thus resolving the contradiction between comfort and effectiveness.
3Reliability
If the focal length is changed continuously over a long period, then the myopia suppression effect is enhanced by prolonged ciliary muscle relaxation and contraction, but the device complexity increases
Solution Approach 1:
The patent applies self-service by implementing automatic control of focal length variation without requiring manual user intervention. The control portion automatically varies the focal length according to predetermined parameters (range, rate, duration) based on detection of viewing conditions. This automated self-service approach enables prolonged focal length variation for enhanced myopia suppression while minimizing device complexity by eliminating the need for manual operation interfaces.
4Ease of operation
If the focal length control is made automatic with appropriate adjustment, then the ease of operation is improved, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent applies feedback by implementing a control system that detects viewing conditions and automatically adjusts focal length variation parameters accordingly. The control portion receives input from detection means (e.g., viewing distance sensors, usage pattern detectors) and dynamically adjusts the focal length variation to optimize both effectiveness and comfort. This feedback mechanism enables automatic control while managing device complexity through intelligent adaptation rather than overly complex hardware.
Data Source
AI summary
Provided is a variable-focus-lens control apparatus that can obtain a higher myopia suppression effect than conventional ones.A variable-focus-lens control apparatus 10 controls a focal length of a variable focus lens 3 for eyes, and is characterized by having a control portion for executing a focal length control to control the focal length of the variable focus lens so that the focal length becomes longer or shorter continuously or stepwise. By executing the present focal length control to control the focal length of the variable focus lens, a high myopia suppression effect and the like can be obtained.