Fluorescein angiography is an eye test that uses a special dye and camera to look at blood flow in the retina and choroid, the two layers in the back of the eye.
When the needle is inserted, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.
When the dye is injected, you may have mild nausea and a warm sensation. These symptoms are usually very brief.
The dye will cause your urine to be darker, and possibly orange in colour, for a day or two after the test.
This test is done to see if there is proper blood flow in the blood vessels in the two layers in the back of your eye (the retina and choroid).
It can also be used to diagnose problems in the eye or to determine how well certain eye treatments are working.