Have you ever wondered why so many people today have to wear glasses? I have.
Scientists are beginning to realize there appears to be a connection between a person’s childhood exposure to sunlight and proper eye/lens development.
Those children who are least exposed to the sun (and most exposed to artificial lighting) grow into myopic (near-sighted) adults.
Here’s a quick quote from an intriguing 2011 piece from the New York Times::
There is significant evidence that the trait is inherited, so you might wonder why our myopic ancestors weren’t just removed from the gene pool long ago, when they blundered into a hungry lion or off a cliff. But although genes do influence our fates, they are not the only factors at play.
In this case, the rapid increase in nearsightedness appears to be due to a characteristic of modern life: more and more time spent indoors under artificial lights.