What is an OCT scan?


Optical Coherence Tomography (OCT) is a new imaging technique that provides unprecedented high resolution and cross-sectional images of the eye. The OCT scan allows microstructures of the eye to be imaged and shows different colour-coded layers of the retina. It is particularly useful in the diagnosis and management of eye conditions such as age-related macular degeneration, diabetic macular oedema, macular hole, epiretinal membrane, vitreo-macular traction syndrome and glaucoma. It has also become a gold standard in monitoring the efficacy of intravitreal anti-VEGF injections (Avastin or Lucentis) for age-related macular degeneration and tailoring treatment regime.

An OCT scan is very quick to perform and it is completely painless and non-invasive. Results are available instantaneously and it is a great way for patients to gain a better understanding of their eye condition.

An OCT scan showing different colour-coded layers of the normal retina.

A patient undergoing an OCT scan



For more information on the use of OCT please see article:

Clinical applications and new developments of OCT an evidence-based review

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