Optical Refraction Switching to Minimize Blur in Vision Comparison
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optometric instruments struggle to accurately and repeatably compare first and second refraction corrections when they are close to each other, as the subject's perception is reset due to temporary blur variations during continuous switching, making it difficult to determine the optimal refraction correction.
Innovation Solution
The method involves controlling the optical system to switch from a first to a second refraction correction without interrupting the light beam, using a specific trajectory and speed variation to minimize blur levels, ensuring the subject can finely compare these corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous switching between refraction corrections is performed without cutting off the field of view, then the subject can maintain visual contact with the target object, but blur variations occur during switching that reset the subject's perception and reduce comparison accuracy
Solution Approach 1:
The patent applies the skipping principle by rapidly transitioning through intermediate refraction corrections during switching between first and second corrections. The optical system passes through intermediate states at high speed, minimizing the time the subject's perception is reset by blur variations. This allows continuous field of view maintenance while reducing the harmful impact of intermediate blur states on comparison accuracy.
Solution Approach 2:
The patent implements dynamics by enabling continuous, real-time adjustment of the optical system's refraction correction without discrete steps or interruptions. The system dynamically transitions between different refraction corrections while maintaining the light beam transmission, allowing smooth adaptation that minimizes perception resetting while preserving visual contact with the target object.
2Adaptability or versatility
If refraction corrections are switched by replacing lens sets, then different corrections can be provided to the eye, but the target object is temporarily masked and the subject's perception is reset
Solution Approach 1:
The patent applies continuity of useful action by maintaining uninterrupted light beam transmission through the optical system during refraction correction switching. Instead of replacing lens sets that would mask the target object, the system continuously adjusts optical parameters while keeping the target visible, ensuring the subject's perception remains active and comparison repeatability is preserved.
Solution Approach 2:
The patent substitutes mechanical lens replacement with an optical control system that adjusts refraction corrections through optical means. This eliminates the need for physical lens substitution that causes target masking, replacing it with a controlled optical adjustment mechanism that maintains continuous visual contact and perception stability.
3Extent of automation
If the optical system passes through intermediate refraction corrections during switching, then continuous adjustment is achieved, but the subject perceives temporary blur levels that differ from the corrections being compared
Solution Approach 1:
The patent applies skipping by rapidly traversing intermediate refraction correction states during automated switching. The system maintains continuous adjustment capability while minimizing dwell time at intermediate blur levels, preventing these transient states from significantly impacting the subject's perception and comparison accuracy of the primary corrections being evaluated.
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
This approach reduces unnecessary blur variations, improving the accuracy and repeatability of the comparison between refraction corrections, allowing for a more precise determination of the optimal refraction correction.
Implementation Method 1
an optical system (2) configured to transmit a light beam (6) coming from a target object (7) to an eye (4) of the subject (5)
Implementation Method 2
an optical system, through which the subject looks at the target object, that enables to modify the refraction correction provided to the eye of the user without cutting off his field of view
Data Source
AI summary
A method and associated instrument in which an optical system is switched from a first to a second refractive power states, to provide a first, and then a second refraction correction to an eye of a subject, the switching being carried on without interrupting a light beam coming from a target object and transmitted by the optical system to the eye of the subject. The switching is carried on in order to circumvent an intermediate refraction correction that is in between said first and second refraction corrections, or with a speed higher than a given limit.