Method and device for measuring data for fitting an ophthalmic lens in a frame for a given individual

A method for measuring data for fitting an ophthalmic lens in a frame for an individual, comprising the following steps:

• a) placing the individual in a natural posture assumed by the individual when the individual looks straight ahead to the horizon without any visual or postural constraint;
• b) displaying a visual target with an adjustable position in a field of view of the individual;
• c) having the individual equipped with the frame adjust the position of the visual target in order to place the visual target straight ahead from the individual;
• and
• d) determining an intersection, with a surface representative of the lens once placed in the frame, of a line of sight of the individual looking at the visual target with the adjusted position, and determining said data for fitting an ophthalmic lens in a frame based on the intersection determined,
• wherein, in step a), a parameter representative of the natural posture of the individual is determined, said parameter representative of the natural posture comprising one or more angles of rotation of the head of the individual measured, or being deduced from the angles of rotation of the head in the natural posture determined in different situations, and
• wherein, in step c) and/or d), a parameter representative of the posture of the individual looking at the visual target is determined and compared to the corresponding parameter representative of the natural posture determined in step a).