Custom-Fit Eyewear Frame Parametrics for Facial Morphology
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Solution Overview
Problem
Current eyewear design methods fail to account for the full diversity of human face morphology, leading to poor fit and discomfort due to rigid proportional grading that does not consider individual facial structures, resulting in issues like dizziness and blurred vision.
Innovation Solution
A parametric design method for custom eyewear frames that involves obtaining a 3D model of a user's head, determining body parameters and adjustable parameters based on user features and preferences, generating a custom eyewear frame design data file, and fabricating the frame using additive manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional proportional grading design method is used, then manufacturing simplicity is maintained, but fit precision deteriorates due to inability to account for individual face morphology diversity
Solution Approach 1:
The patent transforms the traditional fixed proportional grading system into a parametric design system where frame dimensions are defined by adjustable parameters (scale factor, nose bridge position, temple length, etc.). These parameters can be modified based on individual facial measurements to achieve precise fit while maintaining a standardized base model structure, thus resolving the contradiction between fit precision and design complexity.
Solution Approach 2:
The patent creates a comprehensive set of facial measurement landmarks and establishes parametric relationships in advance before actual customization. By pre-defining the parameter system and measurement protocols, the complex customization process is simplified into a systematic workflow that can be efficiently implemented for each customer.
2Adaptability or versatility
If rigid proportion approach is used, then design process simplicity is maintained, but adaptability deteriorates due to failure to account for individual face shapes and morphologies
Solution Approach 1:
The patent applies local quality by identifying specific facial regions (nose bridge, temples, cheeks, etc.) and assigning dedicated measurement landmarks to each region. Each landmark captures local facial characteristics, allowing the design to adapt to individual variations in different parts of the face while maintaining an overall systematic approach to customization.
Solution Approach 2:
The patent segments the facial measurement process into distinct landmark points distributed across different facial regions. This segmentation allows independent measurement and adjustment of various facial features, enabling comprehensive adaptability to individual face shapes while organizing the complexity into manageable discrete elements.
3Ease of operation
If custom-fit design is implemented, then comfort is improved, but manufacturing complexity increases due to individualized fabrication requirements
Solution Approach 1:
The patent creates accurate digital 3D models that serve as virtual copies of each customer's facial geometry. These digital models allow customization and optimization in the virtual domain before physical fabrication, reducing manufacturing complexity by eliminating the need for complex physical trial-and-error fitting processes while maintaining high comfort levels.
Data Source
AI summary
The present invention includes a method for creating custom eyewear. The method may include obtaining a model of at least a portion of a head of a user, determining a set of body parameters, determining values for a set of adjustable parameters, and generating a custom eyewear design data file. The model may comprise a plurality of user features. The set of body parameters may be based at least in part on the plurality of user features. The set of body parameters may comprise a plurality of landmarks. Generating the custom eyewear design data file may include determining generating a stretchable parametric model. The stretchable parametric model may be based at least in part on the set of body parameters. The custom eyewear design data file may be generated based at least in part on the stretchable parametric model and the values for the set of adjustable parameters.