The iPhone uses the blaster IR + the camera to tell if you're looking at the phone to avoid this. Android should be able to implement this though because it rea

The iPhone uses the blaster IR + the camera to tell if you're looking at the phone to avoid this. Android should be able to implement this though because it really just looks for the IR reflecting off the back of your eyes which only happens when you're looking right at the light source. It's the same thing that causes(ed) red eye in photos.