There are no prescription goggles that compare to Pro-Vue's patented Prescription Lens System. There are, however, other less expensive prescription goggles on the market. Most use a generic plastic eyeglass frame, minus the bows, that don't have any secure mounting to keep them from moving around or falling out. Although they're advertised as "prescription goggles", their prices don't include goggles. Also, if you ever see a photo of a prescription goggle that looks like a standard goggle with no prescription lenses in it, that's because IT IS a goggle with no prescription lenses in it! Maybe they don't want to show you what you will actually be getting, or maybe the prescription fell out while they were taking the picture. The bottom line is - There is NO one-piece prescription lens that looks like a regular goggle lens, if there was I would be wearing it, every prescription goggle has a left and a right prescription lens in it.