http://www.nichcy.org/pubs/factshe/fs13txt.htm
This document also available in Spanish
National Dissemination Center for Children with Disabilities, U.S. Department of Education
This fact sheet defines a range of visual impairments including the diagnosis of partially sited, low vision, legally blind, and totally blind. The incidence, characteristics, and educational implications of visual impairment are discussed and resources are included.