Optical and adaptational limits of vision studied using Adaptive Optics Susana Marcos Istituto de Optica, CSIC, Madrid, Spain Ocular aberrations blur the retinal image. Adaptive Optics is an excellent tool to test the potential benefits to vision when aberrations are corrected, and exploring the limits of spatial vision. I will describe a custom developed Adaptive Optics system, provided with a psychophysical channel that we are using to measure the changes in visual acuity (for different luminances and contrast polarities) with corrected high order aberrations, the changes in accommodation when the aberrations are manipulated, the influence of optical aberrations in subjective sharpness impression of natural images and facial recognition tasks, and the potentials for adaptation to ocular aberrations.