Undergoing a fluorescein angiography is an important step in diagnosing macular edema, a condition that causes swelling in the central part of the retina. This procedure helps eye doctors see blood flow in the retina and identify any leaks or abnormalities.

Preparing for the Procedure

Before the test, your doctor may advise you to avoid certain medications or foods. You will be asked to provide your medical history, especially any allergies to dyes or medications. On the day of the procedure, it’s best to wear comfortable clothing and arrive with a driver if you think you might feel lightheaded afterward.

What Happens During the Test

The procedure begins with eye drops to dilate your pupils, which may take about 15-30 minutes. You might experience a slight stinging sensation from the drops. Once your pupils are dilated, the eye doctor will inject a special dye called fluorescein into a vein in your arm. This dye travels through your bloodstream to your eye.

As the dye moves through the blood vessels in your retina, the doctor will take a series of photographs using a specialized camera. You may be asked to look in different directions to get clear images of various parts of your retina. You might notice a warm sensation or a metallic taste in your mouth when the dye is injected, but these feelings are usually temporary.

After the Procedure

Once the pictures are taken, the dye will naturally leave your body through your urine, which may turn bright yellow for a day or two. It’s recommended to drink plenty of fluids to help flush the dye out. You may experience temporary side effects such as nausea, dizziness, or skin discoloration, but these typically resolve quickly.

Most people can resume normal activities immediately after the test. However, you should avoid driving if your pupils remain dilated or if you feel lightheaded. Your doctor will review the images and discuss the results with you, helping to determine the best treatment for your macular edema.