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DescriptionPtosis myasthenia gravis.jpg
English: Photograph of a patient showing right partial ptosis. The left lid shows compensatory pseudo lid retraction because of equal innervation of the levator palpabrae superioris (Herring's law).
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{{Information |Description={{en|1=Photograph of a patient showing right partial ptosis. The left lid shows compensatory pseudo lid retraction because of equal innervation of the levator palpabrae superioris (Herring's law).}} |Source=[http://www.jmedicalc