Evaluation of the Precision of the Microperimetry Function of the Spectral OCT/SLO

Inclusion Criteria: * Subject must be 21 years of age or older. * Subjects recruited to Cohort 1 will have no known retinal disease except for refractive errors (-7.5 D to +7.5 diopters).Subjects who are recruited to Cohort 2 will have one or more of the following retinal pathologies: early and intermediate Age-Related Macular Degeneration, Geographic Atrophy, Diabetic Retinopathy (mild, moderate, severe), Macular Edema secondary to Diabetes, Retinal Vein Occlusion, Central Serous Retinopathy, Pattern Dystrophy, Epiretinal Membrane or Macular Hole. * Subjects who have signed an informed consent form. * Subjects who can comply with the protocol. Exclusion Criteria: * Subjects younger than 21 years of age. * Subjects who cannot comply with the protocol. * Subjects who cannot complete the Simple Test procedures * Subjects who are not available to be testing 3 times during the day (Morning, Mid - Day, and Afternoon). * Subjects with visual acuity worse than 20/100 (Best Corrected). * Subjects with dense media opacities. * Ocular surgery anticipated on the day of the study visit.