I had an eye exam last week and the Doc said nothing had changed and my old glasses were good to go, but since my insurance was picking up the tab, I should get some prescription readers that were made to address my particular astigmatism. I just picked them up. GOOD LORD! Comparing them to $3.00 glasses from Walmart is like drawing a line in the sand with your toe and comparing it to the Grand Canyon! That's the best $150 I never spent!