Which came first – The glasses or the nerd?
The scenario occurred frequently in my youth. There I would be, nestled in a comfortable corner, immersed in a book. The hours would slip away, completely unnoticed as I turned over page after page, until the sun had sunk low over the houses across the street. At this point, like clockwork, my stepmother would wander through the room and, for the first time in several hours, take notice of me.
“For the last time, will you turn on a light!” she would shout, jostling me back to reality. “If you keep reading in the dark like that, you’re going to need glasses!”
For the record, I still have 20/20 vision, despite the fact that I stubbornly continued to read in any light that was adequate to allow me to distinguish one character from the next.
The whole excessive-reading-leads-to-nearsightedness nonsense is a product of a basic misunderstanding of how the eye works. Myopia, or nearsightedness, is caused by a shape discrepancy between the cornea and the eyeball. People are either born with the genetic predisposition to myopia or they are not.
What reading in dim light might cause is eye strain, which can result in soreness around the eyes, headaches, or drowsiness. This is because the muscles that control the eye’s movements and ability to focus are being worked harder than normal. Just like any other muscle, they will be sore after exercise. A little rest will have them back to normal, if not stronger for the workout.
Besides, I’d much rather be well-read and nearsighted than have perfect vision and the intelligence of a fruit fly. But that’s just me.