to filter out late night blue light and enjoy more restful, quality sleep. SpectrumShield™ lenses also help reduce the effects of digital eye strain from laptops, mobile devices, televisions and tablets, including eye fatigue, dry eyes, blurred vision, and headaches! -For home, office, travel & entertainment -Debossed vegan leather case -5 power options including powerless (clear lens) -Helps prevent eye fatigue, dry eye, blurred vision, headaches & restless sleep