38 C.F.R. § 4.83 Ratings at scheduled steps and distances.
Title 38 - Pensions, Bonuses, and Veterans' Relief
In applying the ratings for impairment of visual acuity, a person not having the ability to read at any one of the scheduled steps or distances, but reading at the next scheduled step or distance, is to be rated as reading at this latter step or distance. That is, a person who can read at 20/100 (6/30) but who cannot at 20/70 (6/21), should be rated as seeing at 20/100 (6/30). [41 FR 34257, Aug. 13, 1976, as amended at 43 FR 45354, Oct. 2, 1978]
Title 38: Pensions, Bonuses, and Veterans' Relief
PART 4—SCHEDULE FOR RATING DISABILITIES
Subpart B—Disability Ratings
The Organs of Special Sense
§ 4.83 Ratings at scheduled steps and distances.