A binocular Adaptive Optics (AO) visual simulator was used to study the effect of ocular aberrations on binocular contrast detection in three spatial frequencies (2 c/d, 8 c/d and 16 c/d) and two light levels (1 and 100 cd/m2). For all conditions, AO correction of ocular aberrations improved the binocular/monocular contrast sensitivity significantly. For both light levels, the binocular AO benefits in contrast sensitivity showed no significant difference with the benefits achieved monocularly. For signal at 8 c/d and 16 c/d, the visual benefits increased with the increase of light level. For all tested signal at three spatial frequencies, binocular summations were similar for conditions with and without AO correction of ocular aberrations at high light level. For low light level, binocular summation slightly decreased with AO correction. Our findings expand the knowledge on how ocular aberrations affect the binocular contrast detection in different light levels, while also improving the understanding of visual processing.