binocular single vision


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia.

binocular single vision

The simultaneous use of both eyes so that each eye contributes to a common singular perception. There are grades of binocular single vision; in the highest form the object is fixated at the centre of the retina in both eyes and fusion of the two images allows depth perception (stereopsis).
References in periodicals archive ?
If, however, there is misalignment of the visual axes, but the images are still within Panum's area, there is still binocular single vision, unless fusional reserves are not sufficient to maintain this alignment.
Symptoms are often caused by a failure of, or the need for significant effort from, the visual system in maintaining binocular single vision. Symptoms might include general asthenopia
Most people will be able to overcome these phorias with little difficulty, due to fusional reserves, bringing the eyes into alignment on the fixation target for binocular single vision. However, when someone is unable to maintain this alignment (compensate for the phoria), it becomes decompensated and will likely become symptomatic.