Optical Coherence Tomography (OCT) Scanning is used in the early detection and management of eye diseases. The OCT scan is so detailed that it has even been likened to an MRI of the eye. This scan allows your optometrist to see detailed images of the retina (the inner most layer of the interior eye), enabling them to accurately detect, monitor and control changes to the retina. This procedure is currently the only one that shows in-depth images of the eyes internal structures. Other procedures only show the surface of these structures. The scan only takes minutes and the equipment never touches the eye so you will feel no discomfort.