You're not alone, I just read your comment before I felt like typing it myself. And yes, they should be available from whatever places sell corrected sunglasse

You're not alone, I just read your comment before I felt like typing it myself. And yes, they should be available from whatever places sell corrected sunglasses lenses. You probably just want the mirrored sunglasses style coating. Or what did you mean with "not sunglasses"? Mirroring will make it darker, but not necessarily to an extend where you have trouble, hence my questioning of your reasons.