Progressive Eyepiece Profile Based on Remaining Accommodation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing eyeglasses and contact lenses with fixed power variations often fail to accurately meet individual wearer needs, leading to visual discomfort and slow adaptation due to inaccurate power progression.
Innovation Solution
A method for determining a personalized progression profile for eyepieces based on user-specific measurements and estimates of remaining accommodation, incorporating physiological and visual behavior parameters, to tailor the eyepiece design for improved comfort and clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed power variation is recommended according to age, then the progression length is short and accessibility to boost power is good, but the power variation becomes inaccurate for some wearers
Solution Approach 1:
The patent changes the parameter of power variation from a fixed age-based value to a dynamically calculated value based on remaining accommodation measurement. The progression profile parameters (addition, progression length, near vision point position) are adjusted according to the individually measured remaining accommodation, transforming a one-size-fits-all approach into a personalized optical solution that maintains accessibility while improving accuracy.
2Ease of manufacture
If a fixed power variation is used, then manufacturing is simplified, but wearer comfort and near-vision quality deteriorate due to over or under-correction
Solution Approach 1:
The patent applies preliminary action by measuring the wearer's remaining accommodation before lens fabrication. This pre-measurement allows the progression profile to be customized in advance according to the individual's actual accommodation capacity, ensuring optimal comfort and visual quality from the first use while maintaining a streamlined manufacturing process through digital prescription transmission.
3Productivity
If progression length is shortened for better accessibility, then near vision boost is improved, but adaptation difficulty increases due to precise alignment requirements
Solution Approach 1:
The patent applies local quality by optimizing the progression profile parameters according to the individual wearer's characteristics. The addition value, progression length, and near vision point position are locally adjusted for each wearer based on their remaining accommodation, creating a customized optical field distribution that improves both accessibility and adaptation ease simultaneously.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a method (100) for determining a parameter of a progression profile (320, 420, 610, 620) for an eyepiece (710) intended for a user, the method comprising: obtaining (110) a prescription for the user, the prescription being indicative of at least an optical power suitable for far vision, measuring (140) or estimating (160) a remaining accommodation of the user, said remaining accommodation corresponding to the shorter distance for which the user corrected for far vision manages to have a sharp vision, and determining (170) a parameter of the progression profile based on both the prescription and the remaining accommodation.