MRCP2-0400

A 55-year-old man arrives at the Emergency Department (ED) with severe crushing chest pain, which was later confirmed as a heart attack. He developed atrial fibrillation (AF) two days after the heart attack and was given digitalis, but was not fully anticoagulated at that time. On the sixth day after the heart attack, he collided with a bed and a wall while walking to the bathroom and appeared to be blind, although he denied it and tried to describe objects around his bed. His pupillary reflexes were normal. What is the most accurate description of the lesion that occurred?