1. A system for evaluating an eye of a patient from a set of OCT data comprising: a processor; and a non-transitory computer readable medium storing executable instructions comprising: a layer segmentation component that identifies and segments a plurality of retinal layers within the set of OCT data, the plurality of layers comprising a layer of interest, wherein the layer of interest is an outer retinal layer; a mapping component that generates at least one of an en face representation of the layer of interest and a three-dimensional reconstruction of the layer of interest from the segmented plurality of layers; a parameter generator that derives at least one parameter, representing a thickness of the layer of interest, from the at least one of the en face representation of the layer of interest and the three-dimensional reconstruction of the layer of interest, the at least one parameter comprising one of a volume of the layer of interest, a percentage of the layer of interest having a thickness less than a threshold value, a similarity measure between an attenuation pattern present in the layer of interest and a known pattern associated with a disorder, a percentage of the layer of interest that has atrophied, with a thickness in an atrophied location being zero, and a change in one of these parameters over time; and a user interface that provides the determined at least one parameter to a display.