The present disclosure describes a variety of stereopter devices for testing depth perception using a plurality of three dimensional test sets which lack rotational symmetry around a bisecting horizontal plane. By means of the present stereopter device the plurality of test sets are presented against a uniformly lit and standardized background in each of two orientations to a test subject by rotation of a handle affixed to a housing which carries the test sets on planes orthogonal to a plane perpendicular to the axis of rotation. Following presentation of test sets in one orientation, the device is inverted for presentation of the test sets in the other orientation.
