Figure 1.

A direct way to convey your desire to a computer: just look! When using a monitor, we normally look at a screen button or a link before clicking on them (upper panel). Between looking and clicking, we take the mouse (if we are not holding it all time), locate the cursor, move the cursor to the button or link, check if it reached the target. Gaze fixation at a given monitor location, however, can be promptly recognized with an eye tracker. If our intention to click would be recognized with some technology based on brain signal analysis (lower panel, blue line), computer control could be obtained without the above listed range of motor and sensory activities. (Generally, detection of gaze fixations alone is not enough due to the Midas touch problem, see text for details).