Longitudinal Study of Retinal Function in Eyes Treated for Diabetic Macular Edema With Anti-VEGF Agents

Key inclusion criteria: * Age ≥18 years * Diagnosed with Type 1 or Type 2 diabetes * Best corrected visual acuity 20/320 or better (Snellen) (≥24 ETDRS letters) * At least 1 eye with CI-DME requiring treatment * Able and willing to provide informed consent. Key exclusion criteria: * Ocular or systemic condition, aside from diabetes mellitus (DM), that is likely to affect the assessment of DRSS, DME, or the functioning of the neural retina. * Previous treatment of any kind for diabetic retinopathy or DME * Any condition that may preclude adequate imaging of the macula (e.g. dense cataract or other media opacity, ptosis) * History of rhegmatogenous retinal detachment or macular hole * History of vitrectomy * Intraocular surgery (including cataract surgery) within 4 months prior to enrollment or anticipated within the next 6 months