Motility: myasthenia gravis: 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 · Motility: myasthenia gravis

Sample item

A 30-year-old woman has fatigable ptosis and variable diplopia that improve after resting. Which bedside test supports the diagnosis?

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

The answer and the reasoning

B. Ice pack test

Cooling improves neuromuscular transmission, so ptosis improves after an ice pack is applied for 2 minutes. Acetylcholine receptor antibodies and edrophonium or neostigmine tests also help.

Option by option

  • A. Cotton wisp test

    The cotton wisp tests corneal sensation.

  • B. Ice pack test (correct)

    Correct. Improvement after cooling supports ocular myasthenia.

  • C. Cover test

    The cover test detects tropias.

  • D. Amsler grid

    The Amsler grid tests macular function.

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 B, Ice pack test. Cooling improves neuromuscular transmission, so ptosis improves after an ice pack is applied for 2 minutes.

Why is "Cotton wisp test" not the answer?

The cotton wisp tests corneal sensation.

Why is "Cover test" not the answer?

The cover test detects tropias.

Why is "Amsler grid" not the answer?

The Amsler grid tests macular function.

What concept does this question test?

It tests Motility: myasthenia gravis in Ophthalmology. Acetylcholine receptor antibodies and edrophonium or neostigmine tests also help.

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 Motility: myasthenia gravis?

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.