A water-soluble dye that glows with a brilliant green color when light is shone on it. A dilute solution is used to detect defects in the surface of the cornea, since it stains areas where the ‘epithelium is not intact. In retinal angiography it is injected into a vein and its circulation through the blood vessels of the retina is viewed and photographed by a special camera.
An orange-colored vegetable dye used to examine the eye. Topically, it is used to make visible defects in the corneal epithelium, such as those seen in dry eyes and corneal abrasions and ulcers. Intravenously injected fluorescein is used in retinal angiography to diagnose vascular leakage in the retina.