It is advisable to drink 2 to 3 glasses of water. Avoid liquids such as tea, coffee and other caffeinated beverages. If you wear contact lenses, take the lens case with you as you will need to remove them.
It is also necessary to do an allergy test to check if you are allergic to the substance used in this method.
Your pupils are dilated with drops. You are sat in front of the apparatus, on the support elements of the apparatus in order to fix the head.
Fluorescein dye is injected into a vein in the arm. As the color passes through the blood vessels of your eye, photographs are taken to detect blood flow to your retina. Photographs may reveal abnormal blood vessels or damage to the lining of the retina.
The images will be recorded in black and white. The color will fluoresce in the blood vessels and will be recorded as light gray or white in the image. Interpretation of the abnormal angiogram relies on the identification of areas that show hypofluorescence (darkness) or hyperfluorescence (brightness).
The procedure takes about 10 to 15 minutes. During the procedure you may feel a slight nausea that passes quickly.