The effect of light flashing at 9 Hertz on rivalry suppression

The translid binocular interactor (TBI), which presents binocularly out-of-phase lights flashing at 9 Hz, was designed to reduce suppression of amblyopes. To determine the effect of such flashing lights on rivalry suppression, subjects who showed strong suppression during binocular rivalry were exposed to a modified form of the TBI for a total of 2 2/3 hr over 4 days. A similar group of subjects was exposed to steady binocular light. The modified TBI had no effect on rivalry suppression; the changes in suppression that did occur were equivalent in the two groups.