Question

Which is the Most common ocular finding in myasthenia gravis?

• A. Ptosis
• B. Lagophthalmos
• C. Proptosis
• D. Enophthalmos

Answer 1

The Correct Option is A

Step 1: The hallmark of myasthenia gravis is fatigability - muscles weaken with repeated use and recover with rest. Small muscles that work constantly fail first.
Step 2: The eyelid elevators are exactly such muscles, so an asymmetric, often fluctuating droop of the lid is typically the very first complaint patients notice.
Step 3: Surveys show that over half of patients begin with eye symptoms, and the drooping lid (ptosis) is the single most frequent ocular sign, frequently paired with double vision.
Step 4: Lagophthalmos (incomplete closure), proptosis (forward bulging), and enophthalmos (sunken eye) belong to other disorders and are not typical of myasthenia.
\[\boxed{\text{Ptosis}}\]