1. A method of operation of an eye detection system for safe detection of the eye positions of a subject, the method comprising: estimating the distance from the eye detection system to the subject; if the subject is closer than a predetermined safe minimum distance to the eye detection system: reducing the power level of at least one primary light source of the eye detection system; if the subject is not closer than a predetermined safe minimum distance to the eye detection system: increasing the power level of the at least one primary light source of the eye detection system provided the power level is below a predetermined maximum power level; sensing primary light from the at least one primary light source reflected from the subject to obtain at least one image; and detecting the eye positions of the subject dependent upon the at least one image.