Driving Guidelines Fluorescein YAG laser





Fluorescein Angiography


A fluorescein angiogram may be necessary if you have diabetic retinopathy or macular degeneration.


It is a test which allows the blood vessels at the back of the eye to be photographed as a fluorescent dye is injected into the bloodstream via your hand or arm.

Why is this procedure necessary?

  • To help the doctor confirm a diagnosis and establish the cause of reduction in vision

  • To provide guidelines for treatment and advise of the prognosis

  • To allow the doctor to see the exact area for laser treatment, if appropriate

  • To keep a permanent record of the vessels at the back of the eye and allow follow-up comparisons

How is this test performed?

  • If you are having this test, your pupils will be dilated with eye drops.

  • A small injection of yellow dye will then be injected into a vein in your arm.

  • This dye circulates throughout the body to the retinal blood vessels so that the  network of capillaries (small blood vessels) can be easily seen.

  • A series of flash photos will be taken to show the passage of dye through the vessels at the back of your eye. The doctor will be looking to see whether the dye leaks out of the blood vessels.

  • After your Consultant has seen the results of this test,  the appropriate treatment will be discussed with you.

Are there any side effects?

  • During the injection you may feel warm or experience a hot flush.  This only lasts seconds then disappears.

  • Allergic reactions are rare.  During angiography some 5% of patients will develop nausea but this soon passes.

  • The dye has the effect of yellowing the skin for approximately 3 -6 hours and urine for 24 - 48 hours.  This is entirely normal.

  • You should avoid prolonged exposure to bright sunlight during this period.

  • If you are diabetic, this makes the assessment of your glucose level less reliable by discolouring the testing strips. 

  • However. the fluorescein does not affect your diabetic control and you should continue to monitor your diabetes during this period.

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