Abstract
Retinal imaging serves as a critical adjunct to the diagnosis, monitoring, and treatment of numerous ocular diseases. In particular, wide-field retinal imaging is quickly moving to the forefront in imaging the posterior segment. While conventional fundus imaging captures 30 to 50° field of view in a single capture, significant advances have been made in the past 2 decades to increase the viewing angle, speed, and accuracy of fundus photography, such that a single-field capture is now up to 200°. Moreover, multiple imaging modalities, including color fundus photography, fluorescein angiography, and autofluorescence, are now available a single wide-field imaging platform. This breadth of functionality makes wide-field imaging especially useful in peripheral retinal vascular diseases, such as diabetic retinopathy, posterior uveitis, and retinopathy of prematurity. This review aims to provide a historical perspective on wide-field retinal imaging, highlight the imaging platforms currently available, discuss the advantages and disadvantages of wide-field versus conventional fundus imaging, summarize the current clinical applications of wide-field retinal imaging, and provide an outlook for its future implications.
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