The National Federation of the Blind accepts the federal definition of “blindness” for the purpose of judging eligibility for the NFB’s Scholarship Program.
The federal statute defines blindness as follows:
[T]he term "blindness" means central visual acuity of 20/200 or less in the better eye with the use of a correcting lens. An eye which is accompanied by a limitation in the fields of vision such that the widest diameter of the visual field subtends an angle no greater than 20 degrees shall be considered for purposes in this paragraph as having a central visual acuity of 20/200 or less.
42 U.S.C. § 416(i)(1)(B) (Supp. IV 1986).[1] http://www.law.cornell.edu/socsec/rulings/ssr/SSR90-05.html