Method for manufacturing a custom spectacle frame

A method of manufacturing a spectacle frame face for a wearer, comprising:

• an optical acquisition phase of spatial data relating to the face of the wearer;
• a design phase, from the spatial data, of a three-dimensional virtual model of the frame face;
• a phase of production of the frame face by additive manufacturing from the three-dimensional virtual model;
• wherein the design phase comprises the following operations, carried out within a computer-assisted design system:
• loading a three-dimensional virtual face model constructed from the spatial data derived from the acquisition phase;
• loading or drawing, in a front plane, a sketch defining the contours of the frame face;
• from the three-dimensional virtual model of face:
• loading or drawing, in a horizontal plane, a primary sketch following a curvature of the face seen in the horizontal plane;
• loading or drawing, in a vertical plane parallel to a median plane of relative symmetry of the face, a secondary sketch following the curvature of the face seen in the median plane,
• constructing a three-dimensional web based on both the primary sketch and the secondary sketch, and
• obtaining a blank of the frame face by cutting, in the web, the projection of its sketch thereon perpendicularly to the front plane.