An optical observation device (100) for observing an eye (22) is described, having a microscope means (1), in particular a stereoscopic means, for observation of the anterior segment of eye (22), and having a means (2) for visualizing the retina of eye (22), particularly a stereoscopic means, with at least one camera (21), in particular, a digital camera. In order to provide an optical observation device (100), with which the anterior eye (22) and the retina can be observed alternately, in particular stereoscopically, in a constructively simple way, it is provided according to the invention that visualizing means (2) is designed as an attachment module in front of microscope means (1) and that visualizing means (2) is disposed on a positioning device (12) and can be positioned in front of eye (22), in particular, at a short distance in front of eye (22), via positioning device (12).