Experimental setting for the Critical Flicker Fusion test (A) and Motion coherence test (B).

For the Critical Flicker Fusion test, the subject was placed at 40 cm eye-target distance (subtending 5.7° visual angle) from the flicker tool with the chin placed on a chinrest. The flicker tool was positioned at three different angles in the visual field as illustrated (centrally, at 13° visual angle to the right, and at a 13° visual angle to the left). For the Motion coherence test, the subject was placed at 60 cm eye-target distance (subtending 6.2° visual angle) from the stimulus.