Pupils: 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.

Try it

Ophthalmology · Pupils

Sample item

Which cranial nerve carries the afferent limb of the pupillary light reflex?

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

The answer and the reasoning

D. Optic nerve

Light information from the retina travels through the optic nerve as the afferent limb of the pupillary reflex, while parasympathetic fibers traveling with oculomotor nerve constrict the pupil as the efferent limb.

Option by option

  • A. Facial nerve

    Facial nerve controls facial expression and lacrimation pathways, not this afferent limb.

  • B. Trochlear nerve

    Trochlear nerve innervates superior oblique muscle.

  • C. Oculomotor nerve

    Oculomotor nerve carries the parasympathetic efferent limb.

  • D. Optic nerve (correct)

    Correct: optic nerve carries the sensory afferent signal from the retina.

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, Optic nerve. Light information from the retina travels through the optic nerve as the afferent limb of the pupillary reflex, while parasympathetic fibers traveling with oculomotor nerve constrict the pupil as the efferent limb.

Why is "Facial nerve" not the answer?

Facial nerve controls facial expression and lacrimation pathways, not this afferent limb.

Why is "Trochlear nerve" not the answer?

Trochlear nerve innervates superior oblique muscle.

Why is "Oculomotor nerve" not the answer?

Oculomotor nerve carries the parasympathetic efferent limb.

What concept does this question test?

It tests Pupils in Ophthalmology. The correct option holds because: Correct: optic nerve carries the sensory afferent signal from the retina.

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 Pupils?

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.