Since I must wear glasses, I should have many! I have been ordering glasses from Zenni since 2015 and have not been disappointed yet!! Glasses start at $6.95. Higher prescriptions may cost more.
They also have glasses for children.
https://www.zennioptical.com/p/womens-tr-rectangle-eyeglass-frames/20271?skuId=2027115
https://www.zennioptical.com/p/womens-fullrim-acetate-plastic-cat-eye-eyeglass-frames/1239?skuId=123916
https://www.zennioptical.com/p/stainless-steel-aviator-eyeglass-frames/4190?skuId=419019
https://www.zennioptical.com/p/other-plastic-square-eyeglass-frames/1241?skuId=124122