title: Stereo Vision: The Haves and Have-Nots.
abstract: Animals with front facing eyes benefit from a substantial overlap in the visual fields of each eye, and devote specialized brain processes to using the horizontal spatial disparities produced as a result of viewing the same object with two laterally placed eyes, to derived depth or 3-D stereo information. This provides the advantage to break the camouflage of objects in front of similarly textured background and improves hand eye coordination for grasping objects close at hand. It is widely thought that about 5% of the population have a lazy eye and lack stereo vision, so it is often supposed that most of the population (95%) have good stereo abilities. We show that this is not the case; 68% have good to excellent stereo (the haves) and 32% have moderate to poor stereo (the have-nots). Why so many people lack good 3-D stereo vision is unclear but it is likely to be neural and reversible.
authors.affiliation: McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Canada.
authors.forename: Robert F
authors.initials: RF
authors.lastname: Hess
authors.affiliation: Centre for Intelligent Machines, McGill University, Montreal, Canada.
authors.forename: Long
authors.initials: L
authors.lastname: To
authors.affiliation: McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Canada.
authors.forename: Jiawei
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Centre for Intelligent Machines, McGill University, Montreal, Canada.
authors.forename: Guangyu
authors.initials: G
authors.lastname: Wang
authors.affiliation: Centre for Intelligent Machines, McGill University, Montreal, Canada.
authors.forename: Jeremy R
authors.initials: JR
authors.lastname: Cooperstock
keywords: General population; Stereopsis; have-nots