[ lē′gəl ]
Visual acuity of less than 6/60 or 20/200 using Snellen test types, or visual field restriction to 20 degrees or less.
Typewriters Were Originally Created To Help The BlindOnce regarded as an indispensable device for any writer, the typewriter has long been regarded for both its beauty and functionality. But they were actually first invented to help the blind.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.