Questions You Should Know about Indocyanine Green Angiography

Indocyanine Green Angiography (ICGA) is the gold standard in diagnosing a number of serious eye conditions and is a key diagnostic tool used by ophthalmology specialists worldwide.

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ICGA is particularly useful in the differential diagnosis of

• Polypoidal Choroidal Vasculopathy (PCV)
• Central Serous Chorioretinopathy (CSCR)
• Retinal Angiomatous Proliferation (RAP), which can be misdiagnosed as nAMD (Neovascular Age-related Macular Degeneration)
• Investigation of complex posterior uveitis and white dot syndromes
• Assessment of patients with &#;wet&#; AMD where the presence of polypoidal choroidal vasculopathy (PCV) is in question
• The assessment of choroidal hyperpermeability in patients with central serous chorioretinopathy.

Frequently asked questions

How long does the test last?

The test lasts for about 10 minutes in the case of the fluoresceinography and, in the case of the indocyanography around 40 minutes. Nevertheless, the total time that the patient spends in the centre from arrival to departure is around 1 hour.

Should the test be done on an empty stomach?

You do not need to fast before the test. You should have breakfast like any other day but not eat excessively.

Should I come accompanied?

It is very important to come to the test with someone else, because your vision will be temporarily blurred. Your pupil will be dilated so you will not be able to drive after the test.

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Are there any side effects?

The side effects that pupils may experience from the test are the result of pupils being dilated and may include glare and blurred vision. During the test we can see the flashes and lights that are emitted by the apparatus and on occasions we may experience some nausea or temporary heat. In some exceptional occasions stronger sensations may be experienced.

After the test the patient may continue to experience blurred vision for a few hours as a result of the dilating drops. Some patients may also experience a change in skin colour or the colour of their urine, as the dye is eliminated through the urine.

What happens if I have an unexpected reaction to the dye?

We have a medical and nursing team who are trained in resuscitation and are available at all times in case of an emergency.

How long do the side effects last after the test?

The glare effects last for as long as the effects of the eye drops, which can last for around 4 hours, while the change in urine colour can last for 1 to 3 days, depending on the patient&#;s renal function.

What are the advantages of having the angiography at the ICR?

ICR has the best technology on the market. The highly versatile tool that we use can be adapted and focused depending on the patient&#;s illness to obtain detailed images of the internal layers of the eye, as well as combining the angiography with another test that provides lots of information, the optical coherence tomography (OCT).