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Fig. 5 | International Journal of Retina and Vitreous

Fig. 5

From: Wide-field imaging of sickle retinopathy

Fig. 5

Representative Penman type 1 borders (a), highlighted in the inset (b). Ultra wide-field fluorescein angiography of a left eye of a 26-year-old female with Hemoglobin SS sickle cell disease (a and b). The type 1 classification is based on the presence of smooth and continuous looped arteriovenous anastomoses (Penman et al. 1994). Representative Penman type 2 borders (c), highlighted in the inset (d). Fluorescein angiogram of a left eye of a 33-year-old male with Hemoglobin SS sickle cell disease (c and d). The type 2 classification is based on the presence of jagged, abnormal arteriovenous anastomoses with capillary buds (asterisks) extending towards the periphery (Penman et al. 1994)

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