1. A method for measuring morpho-geometric parameters of an individual wearing spectacles, said method implementing an autonomous computerized device having a screen, a target, a compact image acquisition system furnished with a means for determining the inclination thereof, said system being linked to said screen, and a computer making it possible to control the image acquisition system and to process the images obtained, said method comprising the steps of: acquisition of an item of information relating to a first position of the frame worn by an individual, when he is looking at a point situated in front of him at infinity, with a natural head carriage in a substantially horizontal direction, the pair of spectacles occupying a natural position on the individual's face, observation by the individual of the target placed in a known position with respect to the image acquisition system, while performing at least one upward pitching movement of his head without taking his eyes off the target, the pair of spectacles maintaining an unchanged position on the individual's face with respect to the first step, acquisition by means of the same image acquisition system as that used for the first posture, of several images of the individual's face during this rotation movement, each image corresponding to a particular degree of inclination of the head, selection of the image closest to the ideal image for which the inclination of the face with respect to an axis linking the eyes to the observed target is identical to the inclination of the face with respect to a horizontal direction adopted by the individual when he is looking at a point at infinity, Processing by the computer of the selected image so as to determine the morpho-geometric parameters of the individual, on the basis of the position of the eyes, of the position of the frame in the first posture, of the position of the frame on the selected image, and of the degree of inclination of the image acquisition system, outputting of the result of the measurements.