Anatomy: lacrimal passage: 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 · Anatomy: lacrimal passage

Sample item

The nasolacrimal duct opens into which part of the nose, and which valve guards the opening?

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

The answer and the reasoning

C. Inferior meatus, valve of Hasner

The duct opens in the inferior meatus under the inferior turbinate, with the valve of Hasner at its end. Failure of canalisation of this valve causes congenital nasolacrimal duct obstruction. The valve of Rosenmuller is at the sac and canaliculus junction.

Option by option

  • A. Inferior meatus, valve of Rosenmuller

    The valve of Rosenmuller is at the canaliculus-sac junction.

  • B. Superior meatus, valve of Krause

    The superior meatus is not the site of drainage.

  • C. Inferior meatus, valve of Hasner (correct)

    Correct. Inferior meatus and the valve of Hasner.

  • D. Middle meatus, valve of Rosenmuller

    The middle meatus receives the frontal and maxillary sinus drainage, not the lacrimal duct.

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.

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Questions about this Ophthalmology question

What is the answer to this Ophthalmology question?

The best answer is C, Inferior meatus, valve of Hasner. The duct opens in the inferior meatus under the inferior turbinate, with the valve of Hasner at its end.

Why is "Inferior meatus, valve of Rosenmuller" not the answer?

The valve of Rosenmuller is at the canaliculus-sac junction.

Why is "Superior meatus, valve of Krause" not the answer?

The superior meatus is not the site of drainage.

Why is "Middle meatus, valve of Rosenmuller" not the answer?

The middle meatus receives the frontal and maxillary sinus drainage, not the lacrimal duct.

What concept does this question test?

It tests Anatomy: lacrimal passage in Ophthalmology. Failure of canalisation of this valve causes congenital nasolacrimal duct obstruction. The valve of Rosenmuller is at the sac and canaliculus junction.

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 Anatomy: lacrimal passage?

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.