Neuro-ophthalmology: 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 · Neuro-ophthalmology

Sample item

Which pupil abnormality is common in optic neuritis?

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

The answer and the reasoning

D. Relative afferent pupillary defect

Unilateral optic neuritis reduces afferent input from the affected eye, producing a relative afferent pupillary defect on swinging-light examination.

Option by option

  • A. Fixed bilateral mydriasis

    Fixed mydriasis has other causes.

  • B. Horner syndrome always

    Horner syndrome is not inevitable.

  • C. Absent near response only

    Near response is not the key finding.

  • D. Relative afferent pupillary defect (correct)

    Correct: asymmetric afferent signal causes RAPD.

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.

More Ophthalmology questions

Questions about this Ophthalmology question

What is the answer to this Ophthalmology question?

The best answer is D, Relative afferent pupillary defect. Unilateral optic neuritis reduces afferent input from the affected eye, producing a relative afferent pupillary defect on swinging-light examination.

Why is "Fixed bilateral mydriasis" not the answer?

Fixed mydriasis has other causes.

Why is "Horner syndrome always" not the answer?

Horner syndrome is not inevitable.

Why is "Absent near response only" not the answer?

Near response is not the key finding.

What concept does this question test?

It tests Neuro-ophthalmology in Ophthalmology. The correct option holds because: Correct: asymmetric afferent signal causes RAPD.

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 Neuro-ophthalmology?

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.