1. A method of selecting a stereoscopic pair of images, using a processor, comprising the steps of: (a) selecting and capturing a first image by means of a camera; (b) aligning at least one cursor overlaid on the first image with at least one image feature of the first image; (c) shifting automatically the or each cursor laterally by a predetermined amount; and (d) selecting and capturing a second image by means of the camera when the second image contains the or each feature and the or each cursor is overlaid on the second image and is substantially aligned with the or each feature, wherein the camera has an optical axis and is oriented such that the optical axis when the second image is captured is substantially parallel to the optical axis when the first image is captured.