21 C.F.R. § 349.80 Professional labeling.
Title 21 - Food and Drugs
The labeling of any OTC ophthalmic demulcent drug product provided to health professionals (but not to the general public) may contain instructions for the use of these products in professional eye examinations (i.e. gonioscopy, electroretinography).
Title 21: Food and Drugs
PART 349—OPHTHALMIC DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE
Subpart C—Labeling
§ 349.80 Professional labeling.
