1. A method to evaluate the health of an eye surrounding the fovea using optical coherence tomography (OCT) angiography, comprising: acquiring an OCT angiography dataset over a region of the eye; processing the dataset to generate vasculature information of the region of the eye; calculating a metric based upon the density of vessels from the generated vasculature information; comparing the calculated metric with a collection of metrics calculated from OCT angiography data acquired on eyes having normal vasculature, said comparing step to evaluate the health of the eye; and storing or displaying the results of the comparison or a further analysis thereof.