Patent ID: 8827451

Claim:
A vision testing apparatus for examining heterophoria of the eyes of a subject, the vision testing apparatus comprising: an image generating device including a display for generating test patterns which can be displayed via an optical beam path to the eyes of said subject; said display having a side facing toward the eyes of the subject in said optical beam path; said display having a first group of selected zones supplying a first light to said optical beam path and a second group of selected zones supplying a second light to said optical beam path; an optical component assembly arranged on said side of said display and including a prism matrix configured to separate said first light from said second light to supply the left eye with said first light from said first group and to supply the right eye with said second light from said second group; said prism matrix having a plurality of prism sections extending in a vertical direction; and, said prism sections having respective lens-shaped regions facing toward said display and each of said lens-shaped regions having a convex surface.