http://media.soundmedicine.org/segments/111713_7.mp3
According to a study conducted by the National Eye Institute, myopia, also known as nearsightedness, has risen 66 percent among Americans age 12 to 54 in the past 30 years. Don Mutti, O.D., Ph.D., a professor of optometry at The Ohio State University, talks about his quest to find out the causes. .