COST Pharmacology Basics 3

Question 1

Which ophthalmic viscosurgical device (OVD) is classified as cohesive and is removed easily as a single mass?

Accepted Answer

Healon (sodium hyaluronate)

Answer

High-molecular-weight sodium hyaluronate products like Healon are cohesive and aspirate out as one unit.

Question 2

BSS Plus differs from standard BSS mainly because it contains:

Accepted Answer

Glutathione, bicarbonate, and glucose

Answer

These added components help protect corneal endothelial cells during longer intraocular procedures.

Question 3

Preservative-free epinephrine may be added to the irrigating solution during phacoemulsification to:

Accepted Answer

Maintain pupil dilation

Answer

Intracameral epinephrine helps keep the pupil dilated throughout surgery.

Question 4

Mitomycin C is applied during trabeculectomy or pterygium excision to:

Accepted Answer

Inhibit fibroblast proliferation and scarring

Answer

Mitomycin C is an antimetabolite that limits scar formation, and it must be handled as a cytotoxic agent.

Question 5

Which dye is used to stain the anterior capsule during capsulorhexis in a mature white cataract?

Accepted Answer

Trypan blue

Answer

Trypan blue stains the anterior capsule, improving visibility against a poor red reflex.

COST - Certified Ophthalmic Surgical Technologist Practice Test