1. A camera for imaging the fundus of an eye, the camera comprising optics aligned along an imaging axis intersecting a point on the fundus and configured to focus light reflected back from the fundus onto an image receptor, wherein the optics are capable of varying a field of view of the camera along a path circumferentially around the point on the fundus, whereby the image receptor acquires images of portions of the fundus located at different peripheral locations around the point of the fundus.