Computer Vision Syndrome
Binocular VisionBinocular vision is the term used to describe vision in which both eyes are used together. This type of vision is advantageous as it gives a wide field of view and the ability to detect faint objects is enhanced. It can give steropsis which is parallel vision provided by the eyes' different positions on the head giving precise depth perception. Binocular vision is usually accompanied by single vision or binocular fusion which is a single image being seen despite each eye having its own particular image frame. Lack of binocular vision is normal in babies. Adults that do not have binocular vision can experience distortions in depth perception and visual measurement of distance. Double vision can also be the result of a lack of binocular vision.
Binocular vision can become impaired by any visual condition where the binocular visual skills are underdeveloped. An eye exam should include the testing of these skills. They can be tested by judging the ability to move the eyes across a sheet of paper, the ability to use both eyes together, the ability of the eyes to move and work as a team, depth perception and the ability to transform images from a vertical to horizontal plane. Binocular vision impairments can result in partial or total loss of stereoscopic vision and need to be treated. Most of these impairments are easily detected due to their obviousness.
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