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Patient Education : Retinal Diagnostic Testing

Retinal Angiography


Fluorescein Angiography

An angiogram is a diagnostic procedure used in ophthalmology to image the blood vessels of the retina. It involves inserting a needle into a vein, usually in the arm or back of the hand and injecting a contrast dye. Images of the retina are taken as the dye circulates through the bloodstream. The procedure usually takes around 5 minutes, and the results are available immediately. The procedure is safe, with a low risk of severe adverse reactions.

Fluorescein is a yellow-coloured dye that glows when excited by a certain wavelength of light. This allows imaging of the retinal circulation and is useful in diagnosis and monitoring of conditions such as age-related macular degeneration, diabetic eye disease, and retinal vascular occlusions.

Indocyanine Green Angiography

An angiogram is a diagnostic procedure used in ophthalmology to image the blood vessels of the retina. It involves inserting a needle into a vein, usually in the arm or back of the hand and injecting a contrast dye. Images of the retina are taken as the dye circulates through the bloodstream. The procedure can take up to 10 minutes, and the results are available immediately. The procedure is safe, with a low risk of severe adverse reactions.

Indocyanine green or ICG,an iodine-based contrast dye,glows when excited by a certain wavelength of light. It is often used in conjuction with fluorescein. ICG is a special dye test used to assess the choroid, the layer behind the retina, and can be used in the diagnosis and management of conditions affecting this layer. The conditions include central serous choroidopathy (CSR) and types of age-related macular degeneration, such as polypoidal choroidal vasculopathy.