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.
That same year, the first Beaver County court was held in Beaver. In 1858 Beaver's population received a boost from Mormons leaving San Bernardino, California, at the onset of the Utah War. In 1886 the inhabitants of Circleville abandoned their community because of the Black Hawk War and made their homes in Beaver.