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Optical coherence tomography (OCT) is a new, noninvasive,
noncontact, transpupillary imaging technology which can image retinal structures in vivo with a resolution of 10 to 17 microns. Cross-sectional images of the retina are produced using the optical backscattering of light in a fashion analogous to B- scan
ultrasonography. The anatomic layers within the retina can be differentiated and retinal thickness can be measured. The appearance of a variety of posterior segment pathologies using OCT has been described. These include diabetic retinopathy, macular holes, epiretinal membranes, cystoid macular edema, central serous choroidopathy and optic disc pits. |
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