Millions of Americans have a significant level of vision impairment. This revised edition of The Encyclopedia of Blindness and Vision Impairment is designed to provide students, professionals, and general readers with a comprehensive source of practical information on what has become the second most common disability in the United States. More than 500 detailed entries are written in clear, concise language with a minimum of technical jargon. The volume incorporates a history of blindness and vision impairment with an A-to-Z presentation of health issues, types of surgery, medications, medical terminology, social issues, myths and misconceptions, economic issues, and current research trends. This volume also features updated statistics on blindness and vision impairment, as well as new and updated appendixes offering information on schools for the blind, relevant web sites for further study, and much more. Revised and updated, the second edition features new and expanded entries on: Refractive eye surgery; Cataract surgery; Glaucoma treatment and research; Macular degeneration research.