Which of the following conditions is least likely to cause complete ptosis, where the pupil is covered by the lid?

Which of the following conditions is least likely to cause complete ptosis, where the pupil is covered by the lid?

Complete ptosis, where the pupil is covered by the lid, is unlikely to be due to Horner’s syndrome. Horner’s syndrome typically causes only mild ptosis because it affects Müller’s muscle, which contributes only a small amount to eyelid elevation.

Одобрено от Dr. Petya Stefanova

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