Glaucoma: provocative tests: 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: provocative tests

Sample item

In a suspected narrow angle patient, which provocative test is performed by keeping the patient in a dark room for 60 to 90 minutes?

AProne testBDarkroom testCWater drinking testDMydriatic test

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

The answer and the reasoning

B. Darkroom test

The darkroom test causes pupil dilatation, and a rise of IOP by more than 8 mmHg suggests angle closure risk. The prone test is done lying face down, and the combination is more sensitive. The water drinking test is for open angle glaucoma.

Option by option

A. Prone test
The prone test involves lying face down for 1 hour.
B. Darkroom test (correct)
Correct. Dark room mydriasis can induce a pupillary block.
C. Water drinking test
The water drinking test is for open angle glaucoma.
D. Mydriatic test
Mydriatic provocation is a separate test and not described by this setup.

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 B, Darkroom test. The darkroom test causes pupil dilatation, and a rise of IOP by more than 8 mmHg suggests angle closure risk.

Why is "Prone test" not the answer?

The prone test involves lying face down for 1 hour.

Why is "Water drinking test" not the answer?

The water drinking test is for open angle glaucoma.

Why is "Mydriatic test" not the answer?

Mydriatic provocation is a separate test and not described by this setup.

What concept does this question test?

It tests Glaucoma: provocative tests in Ophthalmology. The prone test is done lying face down, and the combination is more sensitive. The water drinking test is for open angle glaucoma.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. 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: provocative tests?

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.