1. A method of developing a visual processing profile for a person, comprising: displaying a first filtered visual stimulus to a first portion of a field of view of at least one of the person's eyes; allowing the person to respond to the first filtered visual stimulus; measuring the person's response to the first filtered visual stimulus in the first portion of the person's field of view; displaying a second filtered visual stimulus to a second portion of the field of view of the at least one of the person's eyes; allowing the person to respond to the second filtered visual stimulus; measuring the person's response to the second filtered visual stimulus in the second portion of the person's field of view; determining a level of retinal ganglion function of a first retinal ganglion subtype for the person based on at least the person's measured response to the first filtered visual stimulus and the persons measured response to the second filtered visual stimulus; determining a level of retinal ganglion function for at least a second retinal ganglion subtype; and determining the visual processing profile for the person based on at least the determined levels of retinal ganglion function for at least the first and second retinal ganglion subtypes.