Brightness-Dependent Spectacle Lens Centering
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Solution Overview
Problem
Current spectacle lens manufacturing methods struggle to provide complete correction for all viewing directions, leading to significant imaging errors in peripheral areas, and fail to account for individual brightness conditions during centering, resulting in suboptimal adjustment and optimization for individual spectacle wearers.
Innovation Solution
A method that records individual data, including brightness settings and pupil positions for specific usage situations, to optimize spectacle lens design by incorporating brightness-dependent centering and refraction data, ensuring accurate correction for different viewing directions and object distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spectacle lenses are manufactured to provide complete correction for all viewing directions, then correction accuracy is improved, but manufacturing complexity increases significantly
Solution Approach 1:
The patent applies local quality by differentiating correction requirements across different viewing directions. The lens is designed to provide complete correction for central viewing areas while accepting larger imaging errors in peripheral areas. This is achieved by optimizing the lens surfaces for specific evaluation points corresponding to main areas of use, rather than attempting uniform correction across the entire lens surface.
2Productivity
If spectacle lenses are optimized for standard viewing conditions, then production efficiency is improved, but individual adjustment quality deteriorates
Solution Approach 1:
The patent implements preliminary action by pre-calculating and pre-optimizing lens designs for various individual usage situations and brightness conditions. Multiple optimized lens designs are prepared in advance for different scenarios (e.g., different brightness levels, viewing directions). During production, the appropriate pre-calculated design is selected and manufactured, eliminating the need for time-consuming individual measurements and adjustments for each patient.
Solution Approach 2:
The patent applies parameter changes by considering multiple brightness levels (luminance values) as input parameters for lens optimization. The lens design process incorporates brightness-dependent pupil positions and refraction data, allowing the same manufacturing process to produce lenses optimized for different lighting conditions by varying the input parameters rather than changing the physical manufacturing process.
3Ease of operation
If brightness-dependent pupil position is not considered during lens centering, then centering process is simplified, but imaging quality in real usage conditions deteriorates
Solution Approach 1:
The patent implements self-service by using the patient's own brightness-dependent pupil position measurements to automatically determine the optimal lens centering and design parameters. The measured pupil positions at different brightness levels directly inform the lens optimization process, eliminating the need for complex manual adjustments or estimations by the optician.
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 improves the individual adjustment of spectacle lenses by accounting for brightness influences on pupil position, reducing imaging errors and enhancing the overall correction and comfort for spectacle wearers.
Implementation Method 1
a lens is considered fully corrective for a given viewing direction if the values for the sphere, cylinder and axis of the wavefront when passing through the apex sphere correspond to the values for the sphere, cylinder and axis of the prescription for the refractive eye
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to improving the adaptation of a spectacle lens or spectacles by means of an individual, brightness-dependent centration of a spectacle lens.In particular, the invention provides a method for adapting an individual spectacle lens for at least one eye of a spectacle wearer, comprising: - defining an individual usage situation, which includes at least one target brightness value for the light to be perceived by the at least one eye; - determining an individual position of the pupil occurring or expected at the at least one target brightness value for at least one gaze direction of the at least one eye; - determining a reference point of the spectacle lens at which the spectacle lens effects a correction of individual refractive data required for the at least one gaze direction; - providing and arranging the spectacle lens such that the at least one reference point of the spectacle lens is positioned in front of the at least one eye of the spectacle wearer depending on the determined individual value of the pupil position.