As Mashable reports, you'll have to place an order for the glasses and have them shipped directly to Rochester's facilities. From there the company makes custom-fit lenses based on your prescription. And that's where the devil resides: a note to opticians says that prescription total power can't exceed -5 diopters. So if you're blind as a bat like me, even this service might not be any help.
Update: Rochester Optical reached out and provided the following clarification:
"Rochester Optical does not have a limit on prescription optical powers. We'll work with most Rx powers even though SnapChat suggested no more than total Rx power of -5.0 Diopter. We offer standard plastic lenses and various high index lenses. We are proud to say that we have skill technicians and state of art equipment to manufacture lenses for strong prescriptions. The determination factors and recommendations are mostly based on the quality of optics, cosmetics, comfort and weight of the lenses. "