The key to diagnosing and treating many eye diseases is mapping the flow of blood inside the retina. The first step to combating diabetic retinopathy, for example, is locating the abnormal blood vessels that cause it. The test used to map blood circulation in the retina is called fluorescein angiography.
In this procedure (also called an "angiogram") a small amount of a dye is injected into a vein in the patient’s arm. The dye begins to circulate through the bloodstream and reaches the eye within a few seconds. Using a special camera, an Eye Institute photographer takes a series of photos of the retina that show the dye as it progresses through the retinal veins. Blockages, leaks and abnormal vessels become apparent. The entire procedure takes about one hour.
Fluorescein angiography is a dilated pupil exam. The fluorescein dye causes harmless discoloration of the urine and skin, which can last up to 48 hours. Adverse reactions are rare, but can include nausea, vomiting and hives.
The Eye Institute is the first clinic in Wisconsin to provide angiogram results to referring physicians via the Internet. Your physician can view your angiograms online within minutes of your procedure.