Diabetes - How is optical coherence topography (OCT) used to monitor diabetic retinopathy?

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Optical Coherence Tomography, or ‘OCT’, is a technique for obtaining sub-surface images of translucent or opaque materials at a resolution equivalent to a low-power microscope. It is effectively ‘optical ultrasound’, imaging reflections from within tissue to provide cross-sectional images.

This non-invasive technique allows one to obtain a 3D  high resolution cross-sectional image of the retinal fine structure.  This allows the Ophthalmologist to better visualize even minute amount of fluid or blood in and under the retina for diagnosis, treatment, and monitoring of a disease process.