In this study, we investigated whether sighting eye dominance is linked to sensory eye dominance in several frequently used paradigms that involve interocular conflict. Eye dominance was measured by the hole-in-the-card test, binocular rivalry, and breaking continuous flash suppression (b-CFS). Strikingly, none of the three interocular conflict tasks yielded a difference in perceptual report between eyes, when comparing the dominant eye with the non-dominant eye as determined by the hole-in-the-card test. From this we conclude that sighting eye dominance is different from sensory eye dominance. Interestingly, eye dominance of onset rivalry correlated with that of ongoing rivalry, but not with that of b-CFS. Hence, we conclude that b-CFS reflects a different form of eye dominance than onset and ongoing rivalry. In sum, eye dominance seems to be a multifaceted phenomenon, which is differently expressed across interocular conflict paradigms. Finally, we highly discourage using tests measuring sighting eye dominance to determine the dominant eye in a subsequent experiment involving interocular conflict. Rather we recommend that whenever experimental manipulations require a priori knowledge of eye dominance, eye dominance should be determined using pre-trials of the same task that will be used in the main experiment.
Ding, Y., Naber, M., Gayet, S., Van der Stigchel, S. & Paffen, C.L.E. (in press). Assessing the generalizability of eye dominance across binocular rivalry, onset rivalry, and continuous flash suppression. Journal of Vision.