Glaucoma: gonioscopy grading: practice question

A Ophthalmology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Ophthalmology · Glaucoma: gonioscopy grading

Sample item

On the Shaffer grading system, a grade 2 angle indicates what?

ANarrow angle, closure possibleBWide open angleCClosed angleDSlit angle with certain closure

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Narrow angle, closure possible

Shaffer grades the angle width from 4 (wide open, 45 to 50 degrees) to 0 (closed). Grade 2 is about 20 degrees, where closure is possible, and grade 1 is highly likely to close.

Option by option

A. Narrow angle, closure possible (correct)
Correct. Grade 2 is narrow and closure is possible.
B. Wide open angle
Wide open is grade 4.
C. Closed angle
A closed angle is grade 0.
D. Slit angle with certain closure
A slit angle with probable closure is grade 1.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Ophthalmology question

What is the answer to this Ophthalmology question?

The best answer is A, Narrow angle, closure possible. Shaffer grades the angle width from 4 (wide open, 45 to 50 degrees) to 0 (closed).

Why is "Wide open angle" not the answer?

Wide open is grade 4.

Why is "Closed angle" not the answer?

A closed angle is grade 0.

Why is "Slit angle with certain closure" not the answer?

A slit angle with probable closure is grade 1.

What concept does this question test?

It tests Glaucoma: gonioscopy grading in Ophthalmology. Grade 2 is about 20 degrees, where closure is possible, and grade 1 is highly likely to close.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Glaucoma: gonioscopy grading?

Group the red eye by what to examine and what the pupil does. Then use the flashcards and the other Ophthalmology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.