Abstract
MARCUS GUNN PHENOMENON AT THE MEETING of the Ophthalmological Society of the United Kingdom, on July 6, 1893, the London Ophthalmologist R. Marcus Gunn (1822-1887)1presented a paper entitled Congenital Ptosis with Peculiar Associated Movements of the Affected Lid. His case was that of a 15 year old girl with congenital ptosis of the left eyelid. She complained... of the fact that, while eating and occasionally while speaking, the (left) lid is rapidly jerked upwards... When about five weeks old it was noticed that when she was sucking the breast her left upper eyelid nearly went up out of sight... On lateral movement of her jaw to the right side (left external pterygoid) the left upper lid is raised quickly and powerfully, and this position of the lid is maintained as long as the jaw is kept drawn to the right. This phenomenon from the very first evoked great
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