Stereopsis
Stereopsis
Stereopsis (pronounced: steh-ree-OP-sis) is a term in the field of optometry and ophthalmology that refers to the perception of depth and three-dimensional structure obtained on the basis of visual information deriving from two eyes by individuals with normally developed binocular vision.
Etymology
The term "stereopsis" comes from the Greek words "stereos" meaning solid, and "opsis" meaning vision or sight.
Definition
Stereopsis is the impression of depth that is perceived when a scene is viewed with both eyes by someone with normal binocular vision. This is due to the fact that each eye views the scene from a slightly different angle, and the brain combines these two views into a single three-dimensional image. This process is known as binocular disparity.
Related Terms
- Binocular Vision: The ability to maintain visual focus on an object with both eyes, creating a single visual image. Lack of binocular vision is normal in infants but can be a sign of disease or abnormal development in children and adults.
- Depth Perception: The visual ability to perceive the world in three dimensions, coupled with the ability to gauge how far away an object is.
- Monocular Vision: The use of a single eye to see, which results in a lack of depth perception and stereopsis.
- Diplopia: Also known as double vision, it's a condition where a person sees two images of a single object. This condition can interfere with depth perception and stereopsis.
See Also
External links
- Medical encyclopedia article on Stereopsis
- Wikipedia's article - Stereopsis
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