Board Certified Ophthalmologist Board Certified Ophthalmologist Lens and Cataract Questions and Answers 2

Question 1

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?

Accepted Answer

Capsular tension ring

Answer

A capsular tension ring redistributes zonular stress and stabilizes the capsular bag during phacoemulsification in eyes with zonular weakness.

Question 2

Which type of intraocular lens (IOL) is most appropriate for a patient with significant corneal astigmatism undergoing cataract surgery?

Accepted Answer

Toric IOL

Answer

Toric IOLs are specifically designed to correct pre-existing corneal astigmatism at the time of cataract surgery.

Question 3

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?

Accepted Answer

Glaukomflecken

Answer

Glaukomflecken are small anterior subcapsular lens opacities caused by focal ischemic necrosis of the lens epithelium during an acute angle-closure attack.

Question 4

During biometry for IOL power calculation, which formula is generally considered most accurate for eyes with an axial length shorter than 22 mm?

Accepted Answer

Hoffer Q

Answer

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.

Question 5

A 65-year-old diabetic patient develops visually significant posterior subcapsular cataract. Which characteristic is most typical of posterior subcapsular cataracts?

Accepted Answer

Significant glare and difficulty reading in bright light

Answer

Posterior subcapsular cataracts cause prominent glare and near vision difficulty because the opacity sits at the nodal point of the lens.

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Board Certified Ophthalmologist Board Certified Ophthalmologist Lens and Cataract Questions and Answers 2