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Recent Optical Coherence Tomography Imaging of Vitreomacular Disorders

Optical coherence tomography (OCT) has become a ubiquitous and invaluable tool in the retinal clinic as it provides the examiner with a 2D cross-section of the retina; newer machines are also able to reconstruct 3D images. The greater detail afforded by OCT scanning enhances diagnostic capabilities and advances vitreoretinal research. It has proved very useful in surgical planning and provides fine anatomical retinal detail, which can aid post-operative prognostication in certain vitreoretinal disorders. OCT operates on the same physical principles as an ultrasound scan, except it uses light as the carrier signal. First-generation OCTs are capable of resolutions only between 10 and 20µm. Second-generation OCTs improved this to 5–6µm. We await the commercial availability of third-generation and full-field OCTs, which yield resolutions as low as 1–3µm.