Man presents with unilateral new blind spot

A 61-year-old man presented to the Lahey Clinic Emergency Department with a 4-day history of sudden onset painless blurred vision in the right eye. More specifically, he described a new “blind spot” just temporal to central vision.
The patient denied eye pain, redness, flashes or floaters and had no symptoms in the left eye. A detailed review of systems revealed vertigo and disequilibrium starting 3 weeks before presentation. His medical history was notable for hyperlipidemia, obesity, chronic kidney disease, hematuria, microscopic colitis and benign prostatic hyperplasia. His

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