PROCEDURE FOR MEASURING THE ACTUAL PROGRESSION LENGTH OF A PATIENT FOR THE MANUFACTURE OF A PROGRESSIVE LENS (MACHINE-TRANSLATION BY GOOGLE TRANSLATE, NOT LEGALLY BINDING)

The subject of the present invention is a method for measuring the actual progression length of a patient for the manufacture of a progressive lens consisting of a) measuring the distance from the remote reference point (far) to the lower edge of the eyeglass ring chosen by the user perfectly adapted on the face; b) the capture of the lateral image of the user with the optotype; c) calibration of the dimensioning of the image with respect to the known measurements of the optotype; and d) determination of the actual distance of individualized progression based on the following expression: Y1 = y2 x x1/x2 Where Y1 = actual length of progression Y2 = the distance from the reference point of the optotype to the priority axis for remote viewing. X1 = the normal distance from the corneal apex to the main plane of the rim of the frame. X2 = the distance from the corneal apex to the reference point of the optotype. The technical area in which the invention is applied is optical technology. (Machine-translation by Google Translate, not legally binding)