There are three classification systems for individuals with visual impairment that are used by education professionals. To be declared legally blind, an individual must have visual acuity of 20/200 or less, or have a field of vision restricted to 20 degrees or less at the widest point. However, this federal classification system is used primarily to determine eligibility for adult agency services.
have an eye for something. to be good at noticing a particular type of thing She has an eye for detail. He had an eye for the unusual and the exotic which made him a very good shopping companion. See also: an, eye, for, have.
3. XD. A symbol with X being the eyes and D being the mouth, to make a seeming of the person having squinched eyes and a mouth wide open laughing. This is usually used to replace rofl, as the X for eyes indicates that they are laughing so hard they may have fallen off their chair. Usually used in mmorpg s and chat lines.