With Eye Tracking, you can control iPhone using just your eyes. An onscreen pointer follows the movement of your eyes, and when you look at an item and hold your gaze steady, or dwell, you perform an action, such as a tap. All data used to set up and control Eye Tracking is processed on device.Before you beginEye Tracking uses the built-in, front-facing camera on iPhone. For best results, make sure that the camera has a clear view of your face and that your face is adequately lit. iPhone should ...