The definition of legal blindness used in this country requires a best-corrected distance visual acuity of 20/200 or worse in the better eye or a visual field reduction to 20[degrees] in diameter or less. Prevalence and characteristics of dual sensory impairment (hearing and vision) in a veteran population.
Beaverton, Oregon. Beaverton is a city in Washington County, in the U.S. state of Oregon. The city center is 7 miles (11 km) west of downtown Portland in the Tualatin River Valley. As of the 2010 census, the population is 89,803. This makes it the second-largest city in the county and Oregon's sixth-largest city.
Tipton County, Indiana. Tipton County is located in central Indiana, north of the state capital of Indianapolis. According to the 2010 census, the population was 15,936, a decrease of 3.9% from the 2000 population of 16,577. The county seat is Tipton.