You can protect your smartphone and your eyes with an InvisibileShield VisiongGuard blue light filter screen protector. This screen protector filters the blue light that your device emits. Blue light can cause complaints such as insomnia, headaches, and tired eyes. The night mode that your smartphone has by default gives a yellowish glow when you switch it on. A blue light filter screen protector filters this blue light without a yellowish glow. An anti-blue light screen protector doesn't have this. Choose an InvisibleShield VisionGuard made of glass or plastic. Protective glass most closely resembles and feels like your own screen. A protective film lasts a long time and responds well to touch. Choose InvisibleShield VisionGuard+ if you want a screen protector with antibacterial effect. All InvisibleShield screen protectors protect your touchscreen against scratches and dents.