1.2) Study of different face shapes: “Recognition and identification”. The oval face is used as a reference: comparison with other face shapes. The variables to be taken into account. Overall management of these variables: “the golden rectangle”.
1.3) Answers to various parameters: Pupil Distance: width of the gauge. Face shape: Position and size of the hinge. Position of the nose and frame thickness. Study of supports: The “tailor principle”.