Fluorescence angiography with fluorescein or indocyanine green In

fluorescein angiography, 10 ml of 5% fluorescein sodium are injected into one of the patient's cubital veins. Blue and yellow-green filters are then placed along the optical axis of a single-lens reflex camera. The blue filter ensures that only blue light from the light source reaches the retina. The yellow-green

30S 12 Retina Ultrasound examination of the fundus.

30S 12 Retina Ultrasound examination of the fundus.

Fig. 12.6 Ultrasound findings in malignant melanoma (arrow).

filter blocks the blue components of the reflected light so that the camera records only the image of the fluorescent dye (Fig. 12.7).

H Fluorescein angiography is used to diagnose vascular retinal disorders such as proliferative diabetic retinopathy, venous occlusion, age-related macular degeneration, and inflammatory retinal processes. Where the blood-retina barrier formed by the zonulae occludentes is disturbed, fluorescein will leakfrom the retinal vessels. Disorders of the choroid such as choroiditis or tumors can also be diagnosed by this method; in these cases indocyanine is better than fluorescein.

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