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Fig. 3 | BMC Ophthalmology

Fig. 3

From: Grading of macular perfusion in retinal vein occlusion using en-face swept-source optical coherence tomography angiography: a retrospective observational case series

Fig. 3

Grading of perifoveal capillary ischemia. a. Color fundus photo of the right eye of a 44-year old male patient with superior macular BRVO. b. Corresponding en-face SS-OCTA image of the perifoveal capillary arcade at the level of the SCP. A 3 × 3 mm field was selected for maximum definition. The superior portion of the perifoveal arcade shows flow-voids in quadrants Q1 and Q2 due to capillary dropout (asterisks). Note the enlargement of inter-capillary pillars, and capillary rarefaction. c. Corresponding en-face SS-OCTA image of the perifoveal capillary arcade at the level of the DCP. Note that the ischemic changes involving the perifoveal capillary arcade are more profound relative to the SCP image. There is extensive vascular rarefaction and diffuse flow-voids involving the superior quadrants. The FAZ is enlarged with formation of cystoid spaces in the foveal area. Scattered hyperintense streaks representing compensatory telangiectasia are seen (white arrow-heads)

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