Fig. 2. Subgroup analysis of lamina cribrosa displacement. The method of measuring lamina cribrosa depth (LCD) described in Fig. 1 was repeated at each follow-up visit. The values were determined at each follow-up visit and the difference from the first to the last measurement was considered LCD change. A significant LCD change was defined as a value greater, within and less than the reproducibility coefficient (23.08 µm). (A) Posteriorly displaced lamina cribrosa (LC), (B) no significant LC displacement, and (C) anteriorly displaced LC.