Blind person means a person who, after examination by a physician skilled in diseases of the eye or by an optometrist, whichever such person shall select, has been determined to have
(1) Not more than 20/200 central visual acuity in the better eye with correcting lenses, or
(2) An equally disabling loss of the visual field as evidenced by a limitation to the field of vision in the better eye to such a degree that its widest diameter subtends an angle of no greater than 20°.
34 CFR § 395.1
Unless otherwise indicated in this part, the terms below are defined as follows: