IN FACT interesting you would say that.
I actually belive most glasses are OVER PRESCRIBED and Optomitrists DO NOT KNOW WHAT THEY ARE DOING!
My glasses I use now for driving at night, I got them recently. THEY MAKE ME BLIND! They are entirely TOO STRONG and force my eyes to focus far away, and they give me headaches.
I wish I knew all the answers but my first idea is they are simply too strong and optomistrists don't understand that overly strong glasses make eyes lazy, or somehow unable to relax and refocus once they glasses are taken off.