COST COST Anesthesia and Medications in Ophthalmic Surgery

Question 1

Which topical anesthetic agent is most commonly used for ocular surface anesthesia during ophthalmic procedures?

Accepted Answer

Proparacaine 0.5% drops

Answer

Lidocaine 2% injection

Answer

Bupivacaine 0.75% injection

Answer

Tetracaine 0.5% drops

Question 2

Which type of anesthesia involves injecting anesthetic behind the globe to anesthetize the entire eye and immobilize extraocular muscles?

Accepted Answer

Retrobulbar block

Answer

Topical anesthesia

Answer

Peribulbar block

Answer

Sub-Tenon's block

Question 3

Malignant hyperthermia is a life-threatening reaction most commonly triggered by which agents used in general anesthesia?

Accepted Answer

Succinylcholine and volatile halogenated anesthetics

Answer

Propofol and midazolam

Answer

Fentanyl and morphine

Answer

Vecuronium and rocuronium

Question 4

Which mydriatic agent works by blocking muscarinic receptors to dilate the pupil and paralyze accommodation?

Accepted Answer

Atropine

Answer

Phenylephrine

Answer

Epinephrine

Answer

Apraclonidine

Question 5

Intracameral carbachol or acetylcholine is used during cataract surgery primarily for which purpose?

Accepted Answer

To constrict the pupil (miosis) after IOL implantation

Answer

To dilate the pupil for better visualization

Answer

To lower intraocular pressure postoperatively

Answer

To prevent endophthalmitis

Question 6

Which viscoelastic material property is most important for protecting the corneal endothelium during cataract surgery?

Accepted Answer

High viscosity and coating ability (cohesive OVD)

Answer

Low viscosity for easy removal

Answer

Antibiotic properties

Answer

Mydriatic effect