That portion of his vision were dead and doctors could do nothing to restore his sight. “I might run into a tree or step in a pothole,” he says.Įven more unsettling was the message he received from his first visit to a neuro-ophthalmologist. Taking a hike in the woods was out of the question. When walking in crowded areas, people would just pop into sight, as if from nowhere, because he had no ability to detect objects or movement peripherally on the right side. “Every time I opened my eyes I was reminded that I had a severe visual problem,” Risen says. It’s a common complication, estimated to affect up to 50 percent of people who suffer a stroke, and extremely disorienting. Risen had experienced a stroke that damaged his visual cortex, causing blindness on the right side in both eyes. “It was like not getting the whole picture.”Īs he would soon learn from emergency room doctors, “The problem was not with my eyes. “I could only see about half of my normal vision,” he recalls. Without warning or pain, the right side of his field of vision had gone blank, like someone (Photo: Adam Fenster)īy the time James Risen arrived at the Napa Valley hotel his wife had booked in celebration of his 60th birthday, he knew WIDE ANGLE: Using a 7-foot-tall semicircular screen that encompasses a viewer’s entire field of vision, David Knill and other Rochester scientists explore how the brain makes sense of information involving peripheral vision and other cognitive processes of perception.
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