When you are in recovery from corneal transplant, your doctor will begin removing sutures – a few at a time each visit (providing everything is going well.) Each time you leave you’ll be asked to drop antibiotics for 3-4 days several times per day. A tiny amount, all in all.
The tip I have is this… ask the doctor or assistants if you can have a sample antibiotic (left by drug reps) rather than a prescription. The samples have just the right number of drops for 4×3 or 3×3 and are meant to be given away for free. This can save you the cost of the antibiotics and a trip to the drug store. Even ask them to give you several bottles to be used on the subsequent visit (they have a decent shelf life.)
The doctors can get more, trust me.