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.
The power to cause injury or misfortune, as in The tomatoes died shortly after planting-I must have an evil eye. The source of this expression is the ancient superstitious belief that some individuals could inflict harm on others simply by looking at them. Today the term is generally used figuratively or ironically, as above, and also in the form give someone the evil eye, which means glare malevolently at someone.. For example, Helen gave his cat the evil eye, hoping it would stay out of her garden. [Late 1300s].