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.
'Once i had a student, with very shiny eyes and just one eyebrow-'. 'Count Olaf,' Violet said. 'No,' Ishmael frowned, 'This student was a girl. She had only one eyebrow and, due to an unfortunate accident in her uncle's lab, only one ear.'. -Lemony Snicket, THE END.