EYES PC Blue Light Blocking Screen Protector Panel for 20 and 22 inch Diagonal LED PC Monitor (W 19.29 X H 12.48 inch) Absolutely the best optical quality Blue Light Blocking Panel available today. Blocks 100% of Hazardous UV light and reduces HEV Bluelight up to 100% with excellent Color Transmittance. Anti-Blue Light blocking between 380nm~495nm for wide range HEV protection. Reduces digital eye strain when viewing LED screens: Office PC, Home PC, eSports or eGaming. Design allows for easy installation and removal. Sizes available to fit most LED flat panel monitors.