Table 3.
BAF | Hyperautofluorescence (increased exposure of RPE lipofuscin following loss of outer photoreceptor segments) |
Hypoautofluorescence in severely affected areas | |
ICGA | Extended hypofluorescent areas (choriocapillaris ± larger vessel non perfusion) (Figure 11) |
OCT | Loss of photoreceptor outer segments ± chorioretinal atrophic areas |
OCTA | Choriocapillaris drop-out |
FA | Early hypofluo in diseased areas (non-perfusion) then diffuse hyperfluo/pooling (due to retinal ischaemia) (Figure 12) |
BAF = Blue-light fundus autofluorescence; ICGA = indocyanine green angiography; SD-OCT = spectral domain optical coherence tomography; OCTA = OCT angiography; FA = fluorescein angiography.