An apparatus (100), method, computer-readable medium, and computer program product, for designating an OCT scan location to be performed on a retina. The apparatus comprises a display device (110) for displaying an image comprising a background image of the retina and a planning element designating the location ； a touch-sensitive input device (120) that generates touch interaction data indicative of touch interaction of a user with the input device； an image manipulation module (130) determines, based on the touch interaction data, a manipulation to be performed on the displayed image, and applies the image manipulation to the image in response to each touch interaction to generate an updated image to display； and a scan location designation module (140) generates data indicative of the location of the OCT scan to be performed, based on a location of the planning element on the background image in at least one updated image.
