• The interface comfort is very important because it guarantees that EOG guidance would be attractive for the users. Therefore, it will be used the guidance interface more comfortable for the user in function of its ability to do it. • Comfort is inversely proportional to tiredness, and it depends on the ability of the user for doing the guidance ocular actions and time required for reaching the goal. It can be established that the number of ocular actions to do it is directly proportional to tiredness.