Stereoscopy is a technique for creating or enhancing the illusion of depth in an image by means of stereopsis for binocular vision. The word stereoscopy derives from Greek στερεός (stereos) 'firm, solid', and σκοπέω (skopeō) 'to look, to see'. Any stereoscopic image is called a stereogram. Originally, stereogram referred to a pair of stereo images which could be viewed using a stereoscope.
Pocket stereoscope with original test image. Used by military to examine stereoscopic pairs of aerial photographs.
Stereoscopic image of 787 Orange Street, Addison R. Tinsley house, c. 1890s
Stereoscopic image of 772 College Street (formerly Johnson Street) in Macon, Ga, c. 1870s
Kaiserpanorama consists of a multi-station viewing apparatus and sets of stereo slides. Patented by A. Fuhrmann around 1890.
Depth perception is the ability to perceive distance to objects in the world using the visual system and visual perception. It is a major factor in perceiving the world in three dimensions. Depth perception happens primarily due to stereopsis and accommodation of the eye.
Shots at different distances
The horizon line is at the height of the armrests.
View from a window on the 2nd floor of a house
Earth curvature