From an email (friend in the UK with myopia of about -5.00):
The thing I realised about four years ago is that glasses don’t really solve the problem of looking at different depths and distances. Your eyes are forced to adjust to using the maximum strength lens at all distances.That’s why I started wearing weaker glasses most of the day. Besides being more comfortable, I thought it might slow down the rate of deterioration But, thinking about it, if eyes can adjust by getting worse, why not adjust by getting better?
I noticed this when I was around 16 years old too — that the higher-powered glasses weren’t exactly making my eyesight better (in fact, they were making my eyesight worse).
As my eyes became used to the higher-powered prescription for far distance, the higher-powered lenses were too strong for close range. I didn’t have weaker lenses at the time for close range work (and I couldn’t see further than a couple of inches in front of my face without glasses). So it just got steadily worse until mid-2008 when I sought a way to improve my (deteriorating) eyesight by natural means.
This is an important page from the Relearning to See eyesight book.
It contains an excerpt from Why Glasses Are Bad for Children and Young People, by Joseph Kennebeck, a practicing optometrist for more than 50 years.
Click on the thumbnail to view the text: