Humans can perceive visual depth quite well. This is partly because the left and the right eye, being located only few centimeters from each other, see their surroundings from a slightly different ...

Stereograms mark a threshold in understanding visual perception. Modern study of stereopsis began with Wheatstone's invention of the stereogram and stereoscope (~ 1832), important tools in vision ...

Can you spot the hidden image in this 3D Stereogram Optical Illusion using your binocular vision and depth perception? Test your focus and IQ by finding the secret figure concealed within the colorful ...