1. An apparatus for obtaining images of a retina, the apparatus comprising: one or more light sources adapted to provide one or more optical stimuli to the retina in accordance with one or more predetermined stimulation sequences; one or more imaging means adapted to obtain one or more images of the retina; and one or more processing means adapted to correlate the one or more images of the retina with the one or more predetermined stimulation sequences so as to determine one or more responses of the retina to each of the one or more optical stimuli.