A simple device for producing synchronous and asynchronous binocular flicker

Many studies on binocular integration have compared in-phase and out-of-phase flicker stimulation. A new method of producing such stimulation is described. It differs from previous designs in that a combination of polarizers is used rather than mechanical light choppers or electronic flashers. The arrangement produces sinusoidal luminance pulses that can be presented with any degree of asynchrony between the two eyes.