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Optical Coherence Tomography (OCT) is a non invasive high definition, diagnostic imaging device that provides direct cross sectional images of the retina. OCT uses a low strength laser to create a 2 or 3-dimensional reconstruction of the retina. OCTs are very useful for diagnosing disease. They are especially helpful in evaluating disease of the macula such as: Macular holes, Vitreomacular traction syndrome, Age-related macular degeneration, Diabetic retinopathy, Cystoid macular oedema, and Central serous chorioretinopathy. OCTs help your retinal surgeon to monitor your retinal disease following treatment. Since the images are obtained and processed almost instantaneously patients are able to view the scans which greatly helps with their understanding of what is happening inside of their eyes.