Where do they sell plano(clear) non prescripted glasses with no power?

PLZ HELP I NEED THEM QUICK, thank you, your answer helps alot!Where do they sell plano(clear) non prescripted glasses with no power?
Any optical store can do that for you.Where do they sell plano(clear) non prescripted glasses with no power?
Safety glasses are made without Rx.
Optical shop