Do you have any idea about varifocal lenses? What are varifocal lenses? I just heard of bifocal lenses and progressive lenses.

Hi, dear kansassettlement!! There are many kinds of eyeglasses lenses today. They are made of lots of different materials just like titanium, plastic, alloy metal and so on. Nowadays, cheap eyeglasses can be found at the online optical stores. While at the online store, you have the opportunity to browse different kinds of eyeglasses frame, lens, and so on.