Fig. 8.4 Frames from ßuorescein angiography of a patient with a superotemporal branch retinal vein occlusion of the left eye. (a) Frame from the venous phase of the ßuorescein angiogram. The red oval encircles the branch retinal artery overlying the occluded branch retinal vein. The yellow arrows show areas of dense intraretinal hemorrhage that preclude the ability to grade retinal capillary perfusion. (b) Frame from the recirculation

phase of the ßuorescein angiogram. The yellow arrow indicates the hyperßuorescent thrombus. The red oval encircles the foveal avascular zone (FAZ). Approximately the superior 180¡ of the FAZ has an irregular border. (c) Frame from the late phase of the ßuorescein angiogram. The red oval encircles a segment of the occluded vein with wall staining. The yellow arrow shows that there is macular leakage of ßuorescein dye

the Bascom Palmer Eye Institute, in a consecutive series of 65 BRVOs, a baseline FA was obtained in 31 (48%).32

8.2.2 Central Retinal Vein Occlusion

Fluorescein angiography is not necessary for the management of CRVO, but is often performed, most often to attempt to assess the degree

of ischemia (see Chaps. 4 and 9).92 When ßuorescein videoangiography is performed soon after CRVO, diastolic arterial reßux can be found that vanishes in a few days. This has been compared to the same phenomenon found in cilioretinal arteriolar insufÞciency noted in CRVO.80 Iris ßuorescein angiography has been suggested for use in predicting later NVI. In a study of 27 eyes with CRVO, relative area of iris showing late ßuorescein staining was the best predictor of later NVI, but the speciÞcity was poor.64