StarTech.com 17-inch 5:4 Computer Monitor Privacy Filter, Anti-Glare Privacy Screen w/51% Blue Light Reduction, +/- 30 deg. View Angle - 17" 5:4 Computer Monitor Privacy Filter, Anti-Glare Privacy Screen w/51% Blue Light Reduction - Blacks out view outside +/-30 deg - Reduce eye strain blocking up to 51% of blue light - Reversible protector shield w/ glossy or anti-glare matte side