1. A method for normalizing an image of an eye among multiple optical coherence tomography (OCT) devices comprising, in the following specified sequence: (a) normalizing a sample density; (b) normalizing an amount of noise using a suitable noise reduction technique; (c) normalizing a distribution of signal amplitudes; and (d) normalizing a signal quality; wherein the sequence of steps results in a normalized image of the eye among multiple optical coherence tomography devices.