Clip-On Lenses - Blue Blocking Nighttime Eye WearSUPERIOR BLUE BLOCKING The same best selling Spectra479 lenses can now be used with prescription and reading glasses LIGHTWEIGHT These lenses are light as a feather with a minimalist design. You'll forget that you have them on! BRIGHT & CLEAR LENSES These are designed to pass as much non blue light through as possible. There is no dark tint and they are not polarized. You can still make eye contact with loved ones and even forget you are wearing them.