Ewald Hering
Videos
Karl Ewald Konstantin Hering was a German physiologist who did much research in color vision, binocular perception, eye movements, and hyperacuity. He proposed opponent color theory in 1892.
Ewald Hering 2
Ewald Hering's model of how a Vernier acuity stimulus is coded by a receptor array. Receptors marked c signal a different position code along the horizontal direction from either the position a code or the position b code.
Binocular vision
Videos
In visual science, binocular vision focuses on visual perception with two eyes instead of one. Two main areas are directional vision and depth perception. Both eyes can positively or negatively influe
Ewald Hering
…graduating, Hering practiced as a physician in Leipzig. Despite having little time to do research and having even scarcer financial resources, he turned to binocular vision (using both eyes together) and the problem of the horopter (the points in space that project on anatomically identical points on the two retinas…
The grey crowned crane, an animal that has laterally-placed eyes which can also face forward
Line stereogram
Moon stereogram. Photographs taken on September 15 and November 13, 1864, by Rutherford. View with crossed eyes
Line stereogram that can be viewed with crossed eye directions