INCREASING EFFECTIVE EYEBOX SIZE OF AN HMD

A method of dynamically increasing an effective size of an eyebox of a head mounted display includes displaying a computer generated image (“CGI”) to an eye of a user wearing the head mounted display. The CGI is perceivable by the eye within an eyebox. An eye image of the eye is captured while the eye is viewing the CGI. A location of the eye is determined based upon the eye image. A lateral position of the eyebox is dynamically adjusted based upon the determined location of the eye thereby extending the effective size of the eyebox from which the eye can view the CGI.