Free ABO Glaucoma Questions and Answers

Question 1

A 68-year-old patient with newly diagnosed primary open-angle glaucoma (POAG) has an IOP of 28 mmHg in both eyes and early glaucomatous optic neuropathy. What is the most appropriate initial medical therapy?

Accepted Answer

Latanoprost

Answer

Prostaglandin analogs are the first-line treatment for POAG due to their potent IOP-lowering effect, once-daily dosing, and favorable side-effect profile. They work by increasing uveoscleral outflow of aqueous humor.

Question 2

A 55-year-old female presents with sudden onset of severe eye pain, blurred vision, and a mid-dilated, non-reactive pupil. Gonioscopy of the fellow eye reveals a narrow, occludable angle. What is the most likely underlying mechanism?

Accepted Answer

Pupillary block

Answer

Pupillary block is the most common mechanism for primary angle-closure glaucoma. It occurs when aqueous humor is blocked from passing from the posterior to the anterior chamber at the level of the pupil, causing the iris to bow forward and occlude the trabecular meshwork.

Question 3

During gonioscopy, what is the most posterior structure visible in a normal, open angle?

Accepted Answer

Ciliary body band

Answer

The structures of the angle from posterior to anterior are: Ciliary body band, Scleral spur, Trabecular meshwork, and Schwalbe's line. Therefore, the ciliary body band is the most posterior structure.

Question 4

A patient's Humphrey visual field test shows a dense scotoma that begins at the blind spot, arches over the macula, and ends at the horizontal raphe. What is this classic glaucomatous defect called?

Accepted Answer

Arcuate scotoma

Answer

An arcuate scotoma, also known as a Bjerrum scotoma, is a classic visual field defect in glaucoma. It corresponds to damage to a bundle of retinal nerve fibers that arch from the optic disc around the macula.

Question 5

A 2-month-old infant presents with excessive tearing, light sensitivity, and eyelid squeezing. Examination reveals corneal clouding and an enlarged corneal diameter. This classic triad is most indicative of which condition?

Accepted Answer

Congenital glaucoma

Answer

The classic triad of epiphora (tearing), photophobia (light sensitivity), and blepharospasm (eyelid squeezing) is highly suggestive of congenital glaucoma. The elevated IOP causes corneal edema (clouding) and stretching of the globe (buphthalmos).

ABO - American Board of Ophthalmology Practice Test

ABO - American Board of Ophthalmology Practice Test

Free ABO Glaucoma Questions and Answers