No, not that. Or soap poisoning.
Over-surfing and texting.
The rate of nearsightedness in the U.S. increased 66 percent since the 1970s, according to a study that researchers say suggests parents should limit the hours kids spend texting and Web-surfing.
The prevalence of myopia rose to 41 percent in a survey done from 1999 to 2004 from 25 percent in a study completed from 1971 to 1972, according to research by the National Eye Institute in Bethesda, Maryland.
It costs $3.8 billion a year to treat poor distance vision, a tab that rises by $1 billion for every 12 percent increase in the rate of nearsightedness, the study said. The likely cause is less outdoor time and more activities requiring close-up viewing such as text-messaging, playing hand-held video games and Web surfing, said the study’s lead author, Susan Vitale. [More]
This reminds me of a similar submariner affliction, since living inside a 30' pipe and looking through periscopes didn't offer much chance for long-range focusing.
Why is it I am having more trouble with presbyopia then?
Not surfing enough?