Fluorescein Angiography (FA)
This imaging modality utilizes a blue light source (either flash or laser) to illuminate the retina after an orange dye (sodium) fluorescein has been injected intravenously. This dye allows visualization of the retinal circulation, and can help to identify areas of abnormal blood vessel leakage in diseases such as diabetic retinopathy and wet macular degeneration. The Colorado Retina Center performs both conventional FA, as well as ultra-widefield fluorescein angiography. Ultra-widefield angiography can help identifying treatable vascular disease in the far peripheral retinal circulation which can be difficult to visualize on exam or conventional angiography.