• Wear your UV Transmitter lenses the same way you wear your regular prescription lenses. • As soon as you go inside and you are exposed to artificial light, snap your VivaRays Daytime Lenses. After Sunset, snap your VivaRays Evening Lenses, and 2 hours before bed switch to your VivaRays Night lenses, which block 100% of blue and green light, to optimize your circadian rhythm and help you get a great night's sleep.