Refers to a condition in an individual of the inability to see, or the loss of normal or correctable vision. This is usually due to damage or disorders of the eyes, or of the area of the brain that is responsible for vision.
being without sight; or, having a maximal visual acuity after correction by refractive lenses, of one-tenth normal vision or less (20/200 or less on the Snellen test). !-- google_ad_client = "pub-2371764724899146"; google_alternate_ad_url = "http://www.themcfox.com/multiple-sclerosis/ms-drugs/glossary/alternate1-250_250.htm"; google_ad_width = 250; google_ad_height = 250; google_ad_format = "250x250_as"; google_ad_channel =""; google_color_border = "FFFFFF"; google_color_bg = "FFFFFF"; google_color_link = "0000FF"; google_color_url = "9999AA"; google_color_text = "000080";
transient or permanent inability to see with one or both eyes