30 degrees, the 13 inch Surface Pro 8 privacy film darkens your screen when you look at it from the side, while the screen remains straight crystal clear. Are you worried about prying eyes you don't notice Get the Surface Pro X 13 inch privacy screen to protect your sensitive information, passwords, personal content, etc. from prying eyes. Eye protection: The advanced optical technology blocks 97% of blue light and UV rays and effectively protects your eyes from eye damage, visual fatigue, eye pain and headaches. The smooth, matte surface reduces glare by 98%, so you no longer have to worry about a blurred screen due to glare. This Surface Pro 8 privacy screen also protects your screen from dust and scratches from daily use.