1. Optical apparatus for retinal photography comprising: a housing fitted to or adapted to be fitted to a camera and defining an optical path that is aligned with the camera lens assembly and extends therefrom to a nose region of the housing, said housing having a projecting handle dimensioned and profiled to be grasped by hand for holding the apparatus in one hand; and a plurality of lens components in said optical path and an illumination source that co-operate to illuminate a retina of an eye in front of said nose region of the housing, and to image the illuminated retina at the image sensor of the camera.