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Fluorescein Angiogram (FA) & Retinal Photography
Fluorescein angiography (fluorescein - the type of dye that is used.)
Angiogram - a study of the blood vessels) is an extremely valuable test that provides information about the circulatory system and the condition of the back of the eye. FAs are useful for evaluating many eye diseases that affect the retina.
The test is performed by injecting a special dye, called fluorescein, into a vein in the arm. In just seconds, the dye travels to the blood vessels inside the eye. A camera equipped with special filters that highlight the dye is used to photograph the fluorescein as it circulates though the blood vessels in the back of the eye. If there are circulation problems, swelling, leaking or abnormal blood vessels, the dye and its patterns will reveal these in the photographs. Your Doctor can then make a determination as to the diagnosis, and possible treatment options for the patient.
What is Fluorescein Angiography?
This is a test which allows the blood vessels at the back of the eye to be photographed as a fluorescent dye is injected into the bloodstream via your hand or arm.
To help the doctor confirm a diagnosis.
To provide guidelines for treatment.
To keep a permanent record of the vessels at the back of the eye.
How is the test performed?
Your pupils will be dilated with eye drops.
An injection of yellow dye is given into a vein in your arm. A series of photographs is taken as the dye enters the vessels at the back of your eye.
Are there any side-effects?
During the injection you may feel warm or experience a hot flush. This only lasts seconds then disappears. Your skin will be pale yellow and your urine colored fluorescent green. This is entirely normal and may take two days to wear off.
Can I eat or drink before the test?
Yes. It is advisable to eat a light meal before the test. If you have diabetes you must ensure you have had enough to eat.
Should I take my normal medication?
Yes, all your regular medication should be continued. You will be asked before the test what medication you are taking.
Should I inform you of my past medical history?
Yes, this is very important. Also inform us of any allergies that you may have. If you think that you may be pregnant, please inform the medical staff.
When will I get the results of the test?
You will hear from Dr. Ballon right after your test is completed. He will explain his findings.
Can I drive Home?
No. The drops and bright light from the camera will blur your vision for a short time. Please arrange for another adult to collect you from our clinic and escort you home.
Retinal Photography (Routine Photography, Without Angiography.)
For this your pupils will need to be dilated with eye drops, so you should not drive. If you do drive, staff may have to refuse to put drops in your eye and cancel the procedure.
Dilating your pupils stops you from the ability to read and lights become very bright, especially sunlight. Some people do drive, especially if they wait an hour or two after the drops are put in, so they wear off a little, but this is not ideal.
Very occasionally the drops last 3 days, but usually they last 1 hour with maximum effect, and are 80% better after 3 hours. Reading or close work may still be slightly difficult after this. Using sunglasses while your pupils are dilated is very helpful indeed.
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