PERFECTSIGHT Sapphire Anti Blue Light Screen Protector Designed for iPhone 14 Pro Max - Medical-Grade Eye Protection - HD Clear Filter 6 Radiations Shatterproof Diamond Hard Tempered Glass (6.7 inch)

PERFECTSIGHT HD Eye Protection Screen Protector - Patent No # ZL201821506349.2 What is Blue Light? In the light of the phone's screen,It contains a high-energy blue light of 400-470nm,which can go straight to the yellow spot at the base of the retina,causing serious damage to the eyes.

The wavelengths within the blue-violet portion of the light spectrum that are considered potentially most harmful to retinal cells range from 415 to 455 nanometers, and most of our devices emit a high level of blue light, typically around the wavelength starting at 400 nm.

And What are the damaging of blue light? Vision drop or loss.Eyes fatigue, dry, tingling and other phenomenaVisual fatigue aggravates the lesion of macular region.The night's screen disturbs sleep.

PERFECTSIGHT Duty: "Born to protect you and your beloveds' eyes, enjoy healthy and colorful screen protector" Main instruction of Eye Care Tempered Glass Screen Protector By PERFECTSIGHT: Anti 55%-70% Blue Light, Protect Our Eyes and Enjoy Good Sleeping; blocks about 99% of the blue light in 380nm-420nm short wave, blocks above 55% of the blue light in 420nm-465nm short wave.