For 5 years now

For most people you call and make an appointment, have their eyes checked, and get a prescription for the glasses.

You then order them and pay for them.

That is how it normally works.

Zenni Optical - Eyeglasses, Prescription Glasses, Bifocal, Progressive Eyeglasses, Rimless Glasses
Is about the most inexpensive place to get your glasses, as advertised by Clark Howard