1. On a computing device, a method of selectively enhancing content displayed on a display device, the method comprising: displaying a graphical user interface comprising one or more items; tracking a gaze location at which a gaze of a user intersects the graphical user interface; and upon detecting a gaze pattern that meets a defined gaze pattern condition indicative of difficulty in perceiving an item at the gaze location, displaying the item at the gaze location in a visually enhanced form in a user interface object displayed separately from the item at the gaze location.