Figure 3
From: Effect of Weiss ring on peripapillary retinal nerve fiber layer thickness measurements using SD-OCT

A representative SD-OCT scan (optic disc cube: 200 × 200) for group W eyes. A 64-year-old male patient presented with a right eye symptomatic floater. On dilated fundus examination, a Weiss ring was observed near the optic disc, without any peripheral retinal break (A–D). OCT fundus image showing a Weiss ring in the inferonasal area of the optic disc (A). In the deviation map, a red cluster is observed outside the 3.46-mm-diameter scan circle (purple circle) from the center of the optic disc, in the same location as the Weiss ring in the OCT fundus image (B). In the thickness map, a black defect is observed in the same location as the Weiss ring in the OCT fundus image (C). Quadrant map showing the pRNFL thickness. After 4 months, the follow-up SD-OCT image showed a Weiss ring within the scan circle (E–G). Quadrant map showing reduced inferior and nasal pRNFL thicknesses compared to the previous map (H).