Apparatus and method for detecting pupils

A method for pupil detection, said method comprising:

• emitting first light from a first light source at a first illumination angle relative to the axis of a detector;
• emitting second light from a second light source at a second illumination angle relative to said axis, said second illumination angle greater than said first illumination angle, said first light and said second light having substantially equal brightness;
• receiving reflected first light and reflected second light at said detector;
• and
• determining the difference between said reflected first light and said reflected second light, wherein pupils of a subject's eyes are detectable from said difference.

An apparatus for pupil detection, said apparatus comprising:

• a detector for receiving light reflected from a subject;
• a light source for emitting light substantially along the axis of said detector;
• and
• a controller coupled to said detector, wherein said controller identifies eyes of said subject by comparing features of an image generated by said detector against a feature that is characteristic of a region containing said eyes, wherein pupils of said eyes are detectable as relatively bright spots within said region.