Board Certified Ophthalmologist Lens and Cataract Questions and Answers Flashcards
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Read the first 6 Board Certified Ophthalmologist Lens and Cataract Questions and Answers flashcards as text
A 72-year-old patient with a mature white cataract undergoes phacoemulsification. During surgery, the capsular bag is noted to have significant zonular weakness. Which device is most appropriate to stabilize the capsular bag?
Answer: Capsular tension ring
A capsular tension ring redistributes zonular stress and stabilizes the capsular bag during phacoemulsification in eyes with zonular weakness.
Which type of intraocular lens (IOL) is most appropriate for a patient with significant corneal astigmatism undergoing cataract surgery?
Answer: Toric IOL
Toric IOLs are specifically designed to correct pre-existing corneal astigmatism at the time of cataract surgery.
A patient presents with a small, round, white opacity on the anterior lens capsule following a resolved episode of acute angle-closure glaucoma. What is this finding called?
Answer: Glaukomflecken
Glaukomflecken are small anterior subcapsular lens opacities caused by focal ischemic necrosis of the lens epithelium during an acute angle-closure attack.
During biometry for IOL power calculation, which formula is generally considered most accurate for eyes with an axial length shorter than 22 mm?
Answer: Hoffer Q
The Hoffer Q formula has been shown to be more accurate for short eyes with axial lengths under 22 mm compared to other third-generation formulas.
A 65-year-old diabetic patient develops visually significant posterior subcapsular cataract. Which characteristic is most typical of posterior subcapsular cataracts?
Answer: Significant glare and difficulty reading in bright light
Posterior subcapsular cataracts cause prominent glare and near vision difficulty because the opacity sits at the nodal point of the lens.
What is the most common complication following Nd:YAG laser posterior capsulotomy for posterior capsule opacification?
Answer: Elevated intraocular pressure
Transient elevation of intraocular pressure is the most frequent complication after Nd:YAG capsulotomy, typically occurring within the first few hours.