stereopsis
Pronunciation: ster-ee-OP-sis
Three-dimensional depth perception resulting from the brain's processing of slightly different images from each eye (binocular disparity).
Full Definition
Stereopsis is the perception of depth and three-dimensional structure derived from the slight differences (disparities) between the images seen by each eye. This binocular depth cue provides fine stereoscopic discrimination and is mediated by cortical neurons in area V1 and higher visual areas that are sensitive to retinal disparity. Stereopsis can be quantitatively measured using tests such as the TNO, Randot, or Titmus stereo tests, which present targets with calibrated disparities. Loss of stereopsis can result from strabismus, amblyopia, or monocular visual loss, and its presence indicates good binocular function.
Usage
Usage note: Measured in seconds of arc; distinguish from other forms of depth perception.
In Context
- "Fine stereopsis of 40 seconds of arc was demonstrated using the TNO random dot stereotest." — Binocular vision evaluation
- "The absence of measurable stereopsis confirmed disruption of binocular function despite apparent straight eyes." — Strabismus consultation