the term blindness has many meanings. in fact there are over 150 citations for blind in an unabridged dictionary. legal blindness as defined by the social security administration means either that vision cannot be corrected to better than 20/200 in the better eye or that the visual field is 20 degrees or less even with a corrective lens. many people who meet the legal definition of blindness still have some sight and may be able to read large print and get around without support