SHINU Blue Light Glasses for Better Sleep Red Glasses Blocking Blue Ray Tr90 Women Eyeglasses SH086

RED LENS CAN BLCOKING 100% BLUE LIGHT. BUT TOO DARK. CAN NOT GO OUTSIDE. CAN NOT WEAR LONG TIME . SO. ONLY WEAR IT BEFORE YOUR SLEEP. GET BETTER SLEEP. ORANGE LENS 99%. CAT 3. CAN BE LONG TIME WEAR WITH BLUE LIGHT. YOU CAN CHOOICE WHICH YOU NEED.           red lenses glasses block close to 100% of both blue and green wavelengths. While many glasses block only blue light, recent studies have shown that lower wavelengths also have a significant effect on sleep patterns. Red lens glasses is not suitable for long time wearing, it is better for wearing before sleeping. Red lens can blocking all the blue light.. can make good sleep if wear before you go to bed. but too dark. don't wear more than 2 hours. orange lens and transparent lens can long wearing and transparent lens will not change the color you see. yellow lens is for night vision driving. Tinted lenses minimize digital eyestrain caused by harmful blue light (HEV light) emitted from computer screens,