Expert eye care by Ocushield. Reduce headaches and eye strain from your screen with the Ocushield anti blue light screen protector for the Apple iPhone 13 & 13 Pro. No more dry eyes from staring at your screen, our tempered glass screen protector filters 99% of harmful UV and blue light emissions to protect your eyes, and is developed by qualified eye experts, and does not reduce the color quality of your screen like Nightshift mode on the iPhone. Benefits from reducing blue light intake include a lessening of screen induced headaches, improved sleep quality which boosts productivity, and lower levels of eye strain.