![]() If there are certain other defects in the retina then depending on the various features seen, whether we get leakages or staining or blocked fluorescence or window defects whether the dye seen in early phase, late phase or in very late phase or delayed phase and is initially less and increasing etc, we can get very good idea of patients disease. If there is leakage, the dye would also leak out along with the blood in the retina and we would be able to pick up the leakage. If there were blockage then the dye would not go beyond it and would stop at that particular point. If blood vasculature of the retina is normal, then we would get the normal pattern of the retina. This dye would go wherever the blood vessels are present in retina and we would get the picture of that. This dye and the reflected light are greenish in color. This property of dye is used to study the normal or abnormal anatomy of retina. When blue light falls on retina which has Fluorescein dye the reflected light is of green colour & not blue. We can also attach digital camera system or a printer. A special machine called the fundus camera, which has got special lens filters, is used to take photographs of the retina. Since retina is the only place in the body where blood vessels can be seen, it is used to visualize the retinal vasculature that is blood vessels of the retina. In FFA, the chemical dye is injected in the vein of the hand and this dye circulates all over the body and in every blood vessel. It is basically recording and visualization of the blood vessels of the retina using fluorescein dye. Angiography means recording of the angios or the blood vessels. Fluorescense is a property of substance to alter the wavelength of the reflected light on exciting. ![]() ![]() We at Drushti Eye and Retina Centre are fortunate to have one like it. This procedure requires high quality of camera with excellent computerized digital system and fluoresceine dye. ![]() This applies to investigations like fluoresceine angiography, as it allows us to see details of retina which is not visible with naked eyes. ![]()
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