Fig. 2.

Intra-operative and iOCT images in bleb needling surgery Courtesy of Dada et al. [15]. a Intra-operative clinical photograph presenting a flat vascularised bleb. The corresponding live iOCT imaging—horizontal scan (blue horizontal line) and vertical scan (red vertical line)—of the bleb shows apposition of the conjunctiva and sclera with minimal hyporeflective space, indicating a fibrosed/non-filtering bleb with a 26G needle in situ (white asterisk). b iOCT imaging showing a relatively diffusely raised bleb with multiple hypo-reflective spaces post bleb needling, with 26G needle in situ (white asterisk)