There's No Such Thing as Bad Weather: A Scandinavian Mom's Secrets for Raising Healthy, Resilient, and Confident Kids (from Friluftsliv to Hygge)

by Linda Åkeson McGurk

Meanwhile, a 2009 study showed that the prevalence of myopia, or nearsightedness, increased from 25 percent in 1971–72 to nearly 42 percent in 1999–2004. The fact that children spend more time indoors is believed to be the main culprit behind this increase.