About this service
ICG imaging/ICG angiography is a diagnostic procedure which involves taking photographs of the retina. The retina is the light sensitive tissue at the back of the eye. This test is used to diagnose certain eye conditions, to determine and plan treatment.
Common conditions requiring ICG angiography include macular degeneration and retinal vascular disease.
This test takes only a short time, causes little discomfort and needs no special preparation.
A dye (indocyanine green) is used to highlight the blood vessels at the back of the eye. Your eyes will be dilated with eye drops and you will be seated in front of a special camera.
The dye is usually injected into a vein in your arm or hand. A few seconds later, as the dye reaches the vessels at the back of your eye, a series of photographs are taken.
There is no permanent effect on your vision from having the test done.
Following the procedure
Your eyes will have been dilated so you will need someone to accompany you home.
After the test, you can go back to normal daily activities.
In some cases, the angiography may need to be repeated to monitor your response to treatment or changes in your eye condition. You will be advised is this is necessary.