Eye movement sensing method and system

A method for sensing eye movement, comprising the steps of:

• providing a single light source for generating a light beam;
• providing an optical delivery arrangement including an optical splitter device for converting said light beam into a plurality of separate light spots which are equal energy pulses, said device being a delay means for introducing a unique time delay as a unique identification into each of said plurality of separate light spots;
• focusing said plurality of separate light spots on a corresponding plurality of positions located on a boundary whose movement is coincident with that of said eye movement, said boundary defined by two adjoining surfaces having different coefficients of reflection, wherein energy is reflected from each of said plurality of positions;
• providing a single detector optical receiving arrangement for detecting said light energy from each of said plurality of positions;
• and
• monitoring said reflected energy from each of said plurality of positions, wherein changes in said reflected energy at one or more of said positions is indicative of eye movement.