1. A method, comprising: obtaining a data point of a tracked eye gaze at a predetermined sampling interval of a displayed image of an object in a viewing area, the data point representing a detected location of the tracked eye gaze within the viewing area; determining a range of the viewing area in which the data point is located; magnifying the displayed image when the determined range is smaller than a first predetermined range; and shrinking the displayed image when the determined range is larger than a second predetermined range.