Abstract: A method for converting a 2D display screen into an autostereoscopic screen and an adapter suitable for effecting such conversion. According to the invention, the fabrication of a 3D display screen suitable for autostereoscopic image display from a 2D display screen originally designed for two-dimensional image display includes: removing the front bezel from the 2D display screen, attaching an adapter with an optical assembly for separating an image displayed on the image display surface into stereoscopic partial images, Aligning the optical assembly relative to the image display surface so that one of the stereoscopic partial images reaches one eye and at least one other stereoscopic partial image reaches the other eye of an observer, who thus has a stereoscopic vision of the image displayed.