To see a volume image to view of cross stereopair, it is necessary that a left eye saw an image located on the right, right - on the left. It is necessary for this purpose: - to sit down exactly before a monitor in the distance 0,5-1,0 m, close a left eye. Look a right eye at a left image, here by a palm, approximately in 10 - 20 see. from a person cover the right image of stereopair; - close right and open a left eye; - look a left eye on a right image, and cover a left palm other half of stereopair; - not moving a palm, open both eyes and mow a little bit of them on a nose, three diffuse pictures must appear here. It is needed to fix attention on a picture which on a middle. Sight is gradual focus and a picture will become very clear and volume.