Method for determining at least one geometric postural parameter when fitting a corrective spectacle frame on the face of a wearer in the anatomical posture thereof

A method of determining at least one geometrical-and-postural parameter (H, AMV) for positioning a frame (10) of vision-correcting eyeglasses on a face of a wearer in an anatomical posture, wherein the following steps are performed:

• a) defining position-identification means (20) on a wearer's head and/or on the eyeglass frame (10) worn by the wearer in order to identify:
• a position of a frame of reference (O,X,Y,Z) associated with the wearer's head in a frame of reference (O1,X1,Y1,Z1) associated with an image-capture device (90);
• and
• an angle of inclination of said frame of reference associated with the wearer's head in a sagittal plane (PSAG) of the wearer's head about a center of rotation (Ai) of the wearer's head;
• b) capturing a series of at least two images of the head of said wearer by means of the image-capture device (90);
• c) determining in the frame of reference associated with the image-capture device (90), at least one position of the center of rotation (Ai) of the wearer's head in the sagittal plane (PSAG);
• d) in each of said at least two captured images, identifying an image of at least one first remarkable anatomical point (CNi) of the wearer's face;
• e) for each of said at least two captured images, determining the angle of inclination (Ei) relative to a reference plane (PRef) known in the frame of reference (O1,X1,Y1,Z1) associated with the image-capture device (90) of an anatomical plane (PNO) of the wearer's head that is perpendicular to the sagittal plane (PSAG) and that contains said center of rotation (Ai) and said at least one first anatomical point (CNi);
• f) comparing said angle of inclination (Ei) with a predetermined value;
• and
• g) determining a looked-for geometrical-and-postural parameter (H, AMV) as a function of the result of said comparison.