Surgical Procedures and Treatments Flashcards
6 cards from real Vision and Ophthalmology practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Surgical Procedures and Treatments flashcards as text
Phacoemulsification cataract surgery removes the cataract using:
Answer: High-frequency ultrasonic vibration
Phacoemulsification uses an ultrasonic probe to emulsify the cataract nucleus, allowing aspiration through a small (2–3 mm) incision.
LASIK surgery corrects refractive error by:
Answer: Reshaping the corneal stroma with an excimer laser
LASIK creates a corneal flap, then an excimer laser (193 nm UV) ablates the stromal bed to reshape the cornea and correct the refractive error.
Which procedure uses laser energy to create a peripheral iridotomy for treatment of narrow-angle glaucoma?
Answer: Nd:YAG or argon laser peripheral iridotomy (LPI)
Laser peripheral iridotomy (LPI) creates a hole in the peripheral iris to equalize pressure between the anterior and posterior chambers, relieving pupillary block.
Trabeculectomy treats glaucoma by:
Answer: Creating a fistula from the anterior chamber to a subconjunctival bleb
Trabeculectomy creates a guarded sclerostomy (partial-thickness flap) allowing aqueous humor to drain from the anterior chamber into a subconjunctival filtration bleb.
Anti-VEGF intravitreal injections for wet AMD primarily work by:
Answer: Inhibiting vascular endothelial growth factor to suppress choroidal neovascularization
Anti-VEGF agents (ranibizumab, aflibercept, bevacizumab) bind and neutralize VEGF-A, suppressing the CNV and reducing exudation in wet AMD.
Pneumatic retinopexy uses which combination to treat selected retinal detachments?
Answer: Intravitreal gas bubble + cryotherapy or laser
Pneumatic retinopexy involves injecting an expansile gas bubble intravitreally to tamponade the retinal break, combined with cryotherapy or laser to create a permanent chorioretinal adhesion.