This course will allow you to improve your understanding of Optical Coherence Tomography of the retina. The various modules and questions throughout will cover the significance of the individual layers with and without pathology on the retinal scans on both the Topcon Triton and Heidelberg machine platforms. The course will also cover the typical changes seen with diabetes and other non- DR pathologies, including vein occlusions, wet AMD, vitreo-retinal disorders and drug toxicity. Explanation and examples of the grading of OCT scans used within the London Diabetic Eye Screening protocol are also given. Finally you will have a chance to test your knowledge at the end of the modules.