1. An optical coherence tomography (OCT) system comprising: a light source for generating a beam of light; a splitting element for splitting the beam of light into reference and sample arms; optics for scanning the beam over an eye to collect a plurality of A-scans, each A-scan defining a scattering profile as a function of depth; a detector for receiving interfering light from the sample and reference arms and generating signals in response thereto; a display; and a processor for converting the signals into a dataset of A-scans, said processor dividing the A-scans into segments as a function of depth and determining one or more metrics for each segment of said A-scans that are correlated to the level of contrast found in each segment of said A-scans, the processor for classifying the segments of the A-scans according to the value or values of the determined one or more metrics and wherein the processor either: (a) generates and displays an image of the eye based in part on the classification of the segments of the A-scans; or (b) reaquires one or more A-scans based on the classification of the segments of the A-scans.