Question 1
When a resident is prescribed both an ophthalmic solution (eye drops) and an ophthalmic ointment for the same eye at the same time, which administration technique is correct?
▸ Why A is the answer
Drops must be instilled first because they absorb quickly. Waiting 3 to 5 minutes allows the drops to absorb fully before the ointment is applied, which creates a barrier. This is tempting because ointments are thicker, but applying ointment first creates a barrier that prevents the eye drops from being absorbed. This is incorrect because applying them immediately together will cause the ointment to wash out the drops or block their absorption. This is incorrect because ophthalmic medications should never be mixed simultaneously in the eye; they require separate administration to ensure proper dosing and absorption.