Evaluation of visual function in daily life needs to be based on binocular vision. A binocular wavefront sensor is a device that can measure accommodation, convergence, pupil diameter, and aberrations simultaneously and continuously under open-viewing conditions. In this report, the configuration of the binocular wavefront sensor is described, and evaluation of dissociation between accommodation and convergence while watching three-dimensional images, diagnosis of accommodative spasm, objective quantitative evaluation of eye fatigue, and near vision prescription based on continuous accommodative power measurement are discussed.