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.
Washington County is one of the three main counties in the Portland Metropolitan Area in Oregon. This area to the west of Portland is the high-tech center of the state, including the cities of Hillsboro and Beaverton, as well as the corporate headquarters of Nike, Columbia Sportswear, and other well-known Oregon companies.