Cataract surgery: floppy iris: 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 · Cataract surgery: floppy iris

Sample item

A man on tamsulosin for prostatism has progressive pupil constriction and iris billowing during cataract surgery. What is this called?

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

The answer and the reasoning

C. Intraoperative floppy iris syndrome

Alpha-1A antagonists, especially tamsulosin, affect the iris dilator muscle and cause IFIS. Preoperative recognition lets the surgeon use iris hooks or intracameral phenylephrine.

Option by option

  • A. Toxic anterior segment syndrome

    TASS is a sterile inflammation from irrigating agents.

  • B. Posterior capsule rupture

    Capsule rupture is a different complication.

  • C. Intraoperative floppy iris syndrome (correct)

    Correct. IFIS is linked to tamsulosin.

  • D. Suprachoroidal haemorrhage

    Suprachoroidal haemorrhage presents with sudden pain and iris prolapse.

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, Intraoperative floppy iris syndrome. Alpha-1A antagonists, especially tamsulosin, affect the iris dilator muscle and cause IFIS.

Why is "Toxic anterior segment syndrome" not the answer?

TASS is a sterile inflammation from irrigating agents.

Why is "Posterior capsule rupture" not the answer?

Capsule rupture is a different complication.

Why is "Suprachoroidal haemorrhage" not the answer?

Suprachoroidal haemorrhage presents with sudden pain and iris prolapse.

What concept does this question test?

It tests Cataract surgery: floppy iris in Ophthalmology. Preoperative recognition lets the surgeon use iris hooks or intracameral phenylephrine.

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 Cataract surgery: floppy iris?

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.