BS is a 23-year-old woman who complained of moderately severe pain around her left eye for 2 days. She had gone to a local emergency room and a CT scan was performed with no apparent abnormalities. She was sent home on pain pills and told to follow up with her eye doctor. She presented the next day to an ophthalmologist with worsening of the pain. Examination found vision in both eyes of 20/25 and a normal anterior segment by slit-lamp examination. Subtle s-shaped swelling of the left upper lid was noted and there was some tenderness to palpation in the superotemporal orbit.
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