Eye chart number). The denominator indicates the distance in feet at which a person with normal vision could stand to correctly identify the same symbols identified by the person tested. For example, a visual acuity of 20/20 is considered normal. Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision. There is often also a need to test a subject's vision at near or occupational tasks (such as reading or computer use). For these situations, a Rosenbaum
Fight for Sight (U.S.) Society, and WomensEyeHealth.org. Fight for Sight in the U.S. is unaffiliated with the younger organizations with the same name in the UK or in Ireland. Numerous leaders in eye and vision research and academia received a Fight for Sight grant early in their careers, including Harold Scheie, MD (1950), who founded the Scheie Eye Institute at the University of Pennsylvania, Arthur Jampolsky, MD (1952), whose efforts led to the creation of the Smith-Kettlewell Eye Research Institute, A. Edward Maumenee, MD (1958) director of the Wilmer Eye Institute, founder of the Eye Bank Association of America and potent force behind the