3D Autostereogram images are used worldwide by eye specialists for vision therapy.
Improve Your Eyesight with Eye Exercises
3d-video. Instructions: Watch this video while relaxing your eyes and allowing them to focus behind it (diverge) until you see 3D image.
An autostereogram is a single-image stereogram (SIS), designed to create the visual illusion of a three-dimensional (3D) scene from a two-dimensional image. In order to perceive 3D shapes in these autostereograms, one must overcome the normally automatic coordination between accommodation (focus) and horizontal vergence (angle of one’s eyes). Wikipedia
Mathematical SVG 2D-image to 3D model with Blender software
Software: Scilab, Geogebra (mathematics export SVG-images), Musescore (midi music soundfont player) and Blender video editor. Music J.S. Bach ja Axlife äänifontti.