Among the many complications of diabetes is retinopathy, which is essentially damage to cells in the retina that can lead to loss of vision. Unfortunately, by the time patients realize they are losing vision, the damage is irreparable by current clinical options. Our lab has been developing a method to extract quantitative maps of retinal blood flow and vascular permeability as a potential early indicator of retinopathy before it occurs, when drug intervention could delay or avoid vision loss.