Unmeasurable images Swept Source (N=25 images) Enhanced Depth Imaging (N=53 images) Swollen Choroid within two months of onset 15 17 Small pupil 4 5 Poorly defined interfaces more than 2 months after onset 6 31

Table 2: Reasons for unmeasurable swept-source (SS) and enhanced depth imaging (EDI) optical coherence tomograms.