*** Welcome to piglix ***

Monocular vision


Monocular vision is vision in which both eyes are used separately. By using the eyes in this way, as opposed by binocular vision, the field of view is increased, while depth perception is limited. The eyes of an animal with monocular vision are usually positioned on opposite sides of the animal's head, giving it the ability to see two objects at once. The word monocular comes from the Greek root, mono for one, and the Latin root, oculus for eye.

Monocular vision impairment refers to having no vision in one eye with adequate vision in the other.

Monopsia is a medical condition in humans who cannot perceive three-dimensionally even though their two eyes are medically normal, healthy, and spaced apart in a normal way. Vision that perceives three-dimensional depth requires more than parallax. In addition, the resolution of the two disparate images, though highly similar, must be simultaneous, subconscious, and complete. (After-images and "phantom" images are symptoms of incomplete visual resolution, even though the eyes themselves exhibit remarkable acuity.) A feature article in The New Yorker magazine published in early 2006 dealt with one individual in particular, who, learning to cope with her disability, eventually learned how to see three-dimensional depth in her daily life. Medical tests are available for determining monoptic conditions in humans.

Monocular cues provide depth information when viewing a scene with one eye.

Vision has been known to play an important role in balance and postural control in humans, along with proprioception and vestibular function. Monocular vision affects how the brain perceives its surroundings by decreasing the available visual field, impairing peripheral vision on one side of the body, and compromising depth perception, all three of which are major contributors to the role of vision in balance. Studies comparing monocular vision to binocular (two eyes) vision in cataract patients (pre and post surgery), glaucoma patients (compared with healthy age matched controls), and in healthy adults and children (in both binocular and monocular conditions) have all shown to negatively impact balance and postural control than when both are eyes are available. Each of the studied populations still displayed better balance when having only one eye compared to having both eyes closed.


...
Wikipedia

...