Fluorescein angiography
Alternative names:
eye angiography; retinal photography
How the test is performed:
Eye drops that make the pupil dilate (mydriatic drops) are administered. Then the patient is asked to loosen or remove constricting clothing around the neck. The chin is placed on a chin rest and the forehead against a support bar to keep the head still during the test.
Photographs of the fundus are taken before the dye is injected. After the pictures are taken, a vein is located (usually at the bend of the elbow-also called "antecubital" vein), and the dye is injected.
When the dye is injected, a series of rapid photographs are taken. After the dye has been injected, the needle is removed and pressure applied to the injection site for several minutes.
Photographs may also be taken 20 minutes and 1 hour after the injection.
How to prepare for the test:
Arrange for transportation, because your vision may be blurred up to 12 hours after the test. The health care provider may instruct you to discontinue drugs that could affect the test (see "Special considerations"). You must sign an informed consent form. You must remove contact lenses before the test. Tell the health care provider if you have a hypersensitive reaction to iodine. You may be asked to fast for 8 hours.
Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:
How the test will feel:
When the needle is inserted, a small amount of pain or stinging is usually felt. When the dye is injected, mild nausea and a warm sensation may be experienced. These symptoms are usually very brief.
Why the test is performed:
This test is useful in determining if there is proper circulation in the retinal vessels. It can also be performed to diagnose or follow treatment of problems in the eye.
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