1. An electronic device comprising: at least one multi-value key associated with at least two input data values, wherein each multi-value key includes a plurality of units and each input data value corresponds to at least one unit; an eye-tracking system for determining an area where a user is gazing by monitoring an eye movement of the user; and an input value selection module coupled to the plurality of units and to the eye-tracking system; wherein the input value selection module determines probabilistically which input data value was entered based on a value received from at least one unit and on the area where the user is gazing.