What is Fluorescein Angiography?
In order to further investigate certain diseases of the retina including macular degeneration and diabetic retinal disease a study called Fluorescein Angiography is sometimes used. This imaging technique allows for a view of the circulation of the retina and the layers beneath the retina highlighting any abnormalities. The test consists of injecting a small amount of a vegetable-based dye (sodium fluorescein), orange in color (similar to the orange found in pumpkins and squash), intravenously using a small needle in the arm. Blue colored flash photographs, not X-Rays, are then taken of the back of the eyes over the next ten minutes on film. These photographs highlight the circulation through the eye, which is fairly rapid. Examination of these photographs can then give further information about one's eye condition. Note that this test is virtually painless and side effects are uncommon; occasionally, though, persons will get nauseous or get hives. Rarely a more severe reaction may occur.
The information derived from this study is very helpful in determining the cause of many retinal diseases. This test may also be used in conjunction with a photographic technique called Indocyanine Green (ICG) Angiography in certain cases to obtain further information.
For interesting examples of Fluorescein Angiography, please click on the "Rose Guzman's Fluorescein Angiography Hall of Fame" button. Rose Guzman, COT is a Certified Ophthalmic Technician as well as a member of the Ocular Photographers' Society (note: web page has several large pictures and may take a while to completely load depending upon your connection speed)
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