UV420 is a blue light that comes from artificial elements such as LCD Monitors, Smartphones and Tablets. UV light and other forms of high-energy light come not just from sunny skies, they also come at us from cloudy or rainy skies, and even in reflected light.
Short-term exposure to UV rays can cause photo-keratitis, which is sunburn of the eye. Over a long period, it can lead to cataracts. As for the light we can see, it is made up in part of high-energy visible light (HEV light), which is known to potentially cause Age-related Macular Degeneration (AMD) as we get older.
UV420 protection lens helps to shield your eyes from the harmful effects of the sun with a high level of broad-spectrum UVA and UVB protection.
Index 1.6 and 1.67 UV Tect by Korea Daemyung Dagas
Index 1.56, 1.6, 1.67 and 1.74 UV3G, 1.74 UV3G Photochromic by Japan Asahi Lite
Sunergy Photochromic UV420 1.56, 1.6, 1.67 (Coming Soon!)