More than half of the posterior segment inflammatory disorders originate from the choroid or affect the choroid as an adjacent structure to the retina and the sclera.The exact contribution of the choroid in many of these entities is imperfectly understood because of incomplete visualization of the choroid with conventional imaging techniques such as fluorescein and indocyanine green (ICG) angiography, ultrasonog-raphy, and conventional optical coherence tomography (OCT). Newer OCT methods such as enhanced depth imaging (EDI) and swept source (SS) OCT allow visualization and measurements of the choroid in vivo and seem to be a useful addition to the methods used in uveitis. The correlation of these new OCT findings with other imaging modalities through a process called multimodal imaging reveals new information not provided by each of them separately. Multimodal imaging in uveitis has led to new pathophysiological theories, improved our understanding and is being incorporated in the diagnosis and management of an increasing number of uveitis disorders.
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