Nearly two years ago, Andrew C. Revkin, author of the Dot Earth blog at The New York Times and one of the most respected reporters on the environment beat, interrupted his "nonstop journalistic pursuit of paths toward sustainable human progress to focus on sustaining myself." He went for a run in the woods with his son when, short of breath, he stopped to take a rest.
"Then I realize that through my left eye, the world appears paisley--as if I were looking through a patterned curtain," he writes. "Something is really wrong."
In a post on the Times's Well blog, Revkin narrates the story of that day during the July 4th weekend, 2011. In his telling, the partial loss of vision is the first in a series of events that unfold slowly and only gradually lead to the conclusion that he is having a...