“…Eye movement is the most common and obvious pattern of visual behavior, so it attracts more and more researchers' attention to its practical applications, such as humancomputer interface (HCI) [1], driver fatigue detection [3], health care [2], military, cognitive science [4] and so on. A lot of computer manufacturers and software developers endeavor to enhance their products by adding more and more natural interfaces, such as Swedish firm Tobii, which specializes in eye control, teamed up with Lenovo, the world's fourth largest manufacturer of personal computers, to show the world's first eye-controlled laptops at CeBIT 2011 in Hannover, Germany [8].…”