Personalized Eyeglass Frame Geometry Determination
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Solution Overview
Problem
Current methods for manufacturing eyeglasses fail to provide personalized frames that accurately match the wearer's geometric and morphological data, leading to suboptimal comfort, aesthetics, and adaptation to visual correction needs, with a lengthy and tedious adjustment process that depends on operator skill and is prone to errors.
Innovation Solution
A method for manufacturing personalized eyeglass frames using geometric definitions based on wearer-specific data, including morphological measurements and aesthetic preferences, allowing for precise customization of frame elements like the bridge, temples, and lens positioning, and enabling remote fitting through virtual models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of frame on wearer's face is performed, then adaptation to wearer's face shape is improved, but adjustment time and operator skill dependency increase
Solution Approach 1:
The patent applies preliminary action by performing geometric measurements of the wearer's face and virtual positioning of the frame before actual manufacturing. The method determines geometric parameters of the wearer's face (bridge width, temple length, curvature) and uses these to pre-calculate the optimal frame configuration, eliminating the need for time-consuming manual adjustments after lens mounting.
Solution Approach 2:
The patent replaces the mechanical manual adjustment process with a computational geometry system. Instead of relying on operator skill to physically adjust the frame on the wearer's face, the system uses geometric-morphological data processing and mathematical calculations to determine precise frame parameters, substituting human mechanical adjustment with automated computational analysis.
2Manufacturing precision
If comprehensive geometric-morphological data is collected for personalization, then frame adaptation quality is improved, but measurement complexity and resource consumption increase
Solution Approach 1:
The patent applies the extraction principle by isolating and measuring only the specific geometric-morphological parameters relevant to frame fitting (bridge width, temple length, curvature, face shape characteristics) rather than attempting to capture all possible facial features. This selective extraction of critical geometric data reduces measurement complexity while maintaining personalization accuracy.
Solution Approach 2:
The patent transforms complex geometric-morphological measurement data into simplified geometric parameters that can be directly used for frame design. By converting detailed facial measurements into key parameters (bridge width, temple length, curvature angles), the system reduces data complexity while preserving the essential information needed for accurate frame adaptation.
3Ease of operation
If frame geometry is customized based on wearer's face morphology, then wearing comfort is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the frame into distinct geometric components (front frame, temples, bridge, nose pads) and determining the geometry of each segment separately based on corresponding facial features. This modular approach allows each component to be optimized independently for comfort while simplifying the overall manufacturing process through standardized segment production.
Solution Approach 2:
The patent applies local quality by customizing specific local features of the frame (temple curvature, bridge width, nose pad positioning) according to the wearer's local facial morphology, while maintaining standard geometry for other portions of the frame. This selective customization improves wearing comfort at critical contact points without requiring complete frame redesign, thus managing manufacturing complexity.
Data Source
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AI summary
The invention relates to a method for determining a geometric definition of a customized optical device adapted to the wearer thereof, including at least one geometric definition of a customized frame of said customized device. According to the invention, the geometric definition of said customized frame is determined on the basis of at least one geometric parameter (Pperso) for customizing the frame and on the basis of a reference frame (10) selected by the wearer. The value of said at least one geometric parameter (Pperso) for customizing the frame is determined on the basis of the acquisition of data related to at least one morphological size of the head (TS) of the wearer such that the customized frame is fitted in accordance with at least one fitting criterion for customizing the geometry of the frame in relation to the morphological size of the head (TS) of the wearer.