This lets the doctor see how nicely blood moves inside your retina. It helps diagnose diabetic retinopathy, retina detachment, and macular degeneration. The doctor will inject a Distinctive dye, named fluorescein, into a vein inside your arm. This test detects the afferent pupil defect, also known as the Marcus Gunn http://visioncenter.aioblogs.com/14372599/optometrist-in-rochester-things-to-know-before-you-buy