BINOCULAR INTERACTIONS IN FLICKER

Sherrington''s study of binocular flicker was extended by measuring observers'' [human] sensitivity to light that was modulated sinusoidally at frequencies between 0.1-50 Hz. Compared with the condition in which both eyes are stimulated in-phase, about 40% more modulation is needed to detect high-frequency flicker when the 2 eyes are stimulated in counterphase; at low frequencies this difference is even greater. The earlier c.f.f. [critical flicker frequency] studies may underestimate the amount of binocular interaction in the detection of flicker.