1. A method for tracking a gaze, the method comprising: determining a position of a first center point of a cornea by using at least two first lighting reflection points detected from an eyeball area of a first face image of a user; determining a first vector connecting at least two first image feature points detected from the first face image to the position of the first center point of the cornea; determining a position of a second center point of the cornea corresponding to a second face image using the first vector and a position of at least two second image feature points detected from the second face image, when at least two second lighting reflection points are not detected from an eyeball area of the second face image of the user; determining a second vector using the position of the second center point of the cornea and a position of a center point of a pupil detected from the eyeball area of the second face image; and tracking the gaze of the user by using the second vector.