EnChroma Tilden Black Cx3 Outdoor Sun SP Sun Glasses for colorblind vision (original price $379). The EnChroma Tilden Black Sun Glasses are designed for colorblind vision, offer a revolutionary way to experience true color for the first time. Transform your view and see the world in full color! They were given to me as a present but I never used them as I need prescription. Specifics: Cx3 Outdoor Sun SP Lens Code: Cx3.PT.VEN.BK.PL Size: M; dimensions 52-19-145. This means the lens width is 52mm, the bridge width (the distance between the lenses) is 19mm, and the temple length (the length of the arm piece) is 145mm. Check on the enchroma website to make sure that these are right for your type of colorblindness!!