The defining factor that makes this VisionGuard screen protector stand out is its ability to block harmful high-energy visible (HEV) blue light and filter out 99% of UV light projected from your device screen.  Whilst providing protection for your handheld this screen protector has the added benefit of maintaining your eye health.• Blocks harmful light, reducing the negative impact on eye health.• Does not dullen the display of the smartphone.• Super transparent film.