24" Anti Blue Light Anti Glare Screen Protector for Dell/HP/Acer/ViewSonic/ASUS/Aoc/Samsung/Sceptre/LG Diagonal 24" 16:9 Standard/Curved Monitor &Touchscreen, Protection Eyes (20.94" x 11.77" /W x H)

Blue light is wavelengths between 380nm to 495nm short and has high energy blue ray, also known as "high-energy visible light" (HEV), Short- wave blue light between 400-450nm is most harmful to the retina, exposure to blue light can cause eye diseases, physiological cycle, cannot to fall asleep at night Exposure to blue light may caused? Vision drop or loss.

Eyes fatigue, dry, and other phenomena.

Visual fatigue aggravates the lesion of macular region.

The night's screen disturbs sleep.

The main sources of blue light in daily life PC, cell phone, game machines, TV, etc.