Proparacaine and tetracaine are examples of which type of ophthalmic medication?

• A. Topical anesthetics
• B. Antibiotics
• C. Steroids
• D. NSAIDs

Answer: (A)

This question tests recognizing what proparacaine and tetracaine do in the eye: they are topical local anesthetics. They numb the ocular surface by blocking voltage-gated sodium channels in nerve endings of the cornea and conjunctiva, preventing nerve impulses and producing rapid, short-term loss of sensation. This makes them ideal for quick eye exams or minor procedures where avoiding discomfort is important. They are not antibiotics, steroids, or NSAIDs, which treat infection, inflammation, or pain without causing numbness. Keep in mind that these agents are meant for short use; prolonged or repeated use can irritate or damage the cornea and carry some risk of systemic absorption.