1. An electronic eye depth testing method comprising a three dimensional cubic space displayed on a display screen, said cubic space having a first image of a three dimensional object and a second image of a three dimensional object, said first and said second images randomly placed within said cubic space, said first image located at the intersection of two perpendicular vertical planes and a horizontal plane perpendicular to said two vertical planes, said second image located at the intersection of two perpendicular vertical planes and a horizontal plane perpendicular to said two vertical planes, wherein a subject to be tested moves said images into convergence in the center of said cubic space.