Binocular Interactions in Flicker

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Abstract
Sherrington's (1904) study of binocular flicker was extended by measuring observers’ sensitivity to light that was modulated sinusoidally at frequencies between 0·1 and 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 two eyes are stimulated in counterphase; at low frequencies this difference is even greater. These results suggest that the earlier c.f.f. studies underestimate the amount of binocular interaction in the detection of flicker.

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