Pupillary Distance (PD) is the distance, in millimeters, between the center of one pupil to the center of the other. The PD is needed to manufacture your eyeglasses because it determines the exact optical center of the lens, which is the point where you look through the lens.Printable...
step101. The user positions themselves at an arm's length distance from the camera; step102. The user moves their face towards the camera at constant speed while staring at it; step103. The user stops when they can no longer stare at the lens or when the system signals them to stop. ...