1. An apparatus for generating 3D image information from within the eye of a patient and for identifying the location of the fovea from within the image information, said apparatus comprising: an optical coherence tomography (OCT) system, said system including a light source, a beam splitter for dividing the light along a sample arm and a reference arm, said sample arm further including a scanner for scanning the beam transversely over the eye, said OCT device including a detector for receiving light returned from both the sample and the reference arms and generating signals corresponding to three dimensional image information based on a reflection distribution as a function of depth arising from reflecting features in the eye; and a processor for segmenting the image information and assigning a single representative intensity value for each transverse location across the segmented region wherein the representative intensity value corresponds to an integrated intensity as a function of depth across the segmented region and determining the location of the fovea based on the transverse location having a minimum representative intensity value.