You don't have to hide them. Bring them with you to medical on day 2 and tell the doc you had PRK, have a prescription for them, and he will put his initials on the bottle saying they are good to go. Then just take them in the morning or at night when you are in your rack.
The only person that could possibly find them before you see the doc is a Candio. And IF they are gay enough to give you shit, tell them you were told to take them to medical for approval. No one can tell you that you can't have a prescription med except a doc.
At least that is what I did...