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The mean episcleral vessel density of OCTA scans in the control, PWS, SWS groups (A), its correlation with limbal involvement of episcleral abnormalities using slit-lamp photographs (B), and Bland-Altman plots comparing OCTA and slit-lamp quantification methods (C). Data are presented as mean ± 95% CI. *Compared with controls, P < 0.05; **compared with controls, P < 0.01; ##compared with PWS, P < 0.01; r = 0.58, P < 0.01 (B).
