38 C.F.R. § 4.80 Rating of one eye.
Title 38 - Pensions, Bonuses, and Veterans' Relief
Combined ratings for disabilities of the same eye should not exceed the amount for total loss of vision of that eye unless there is an enucleation or a serious cosmetic defect added to the total loss of vision.
Title 38: Pensions, Bonuses, and Veterans' Relief
PART 4—SCHEDULE FOR RATING DISABILITIES
Subpart B—Disability Ratings
The Organs of Special Sense
§ 4.80 Rating of one eye.

