Computer aided diagnosis and treatment of retinal disorders is enabled through an ophthalmic augmented reality environment being developed around the standard slitlamp biomicroscope.Th is system will allow the physician to view superimposed fundus photographic and angiographic data on the real-time slitlamp biomicroscopic image. The overlay capability requires real-time image acquisition, processing, mosaicking and comparison.N on-real time capabilities include the coregistration of similar or differing sources such as slitlamp biomicroscope, fundus photograph, or angiograms.M osaicking enables the creation of montages from a collection of images and provides a context for robust registration and comparison.Th is paper outlines the image-processing architecture and controls to provide these functionalities.