Fig. 1

Example of Schlemm’ s canal (SC) and trabecular meshwork (TM) measurements made using the swept‑source optical coherence tomography. The black oval space shows SC. The SC diameter: from the anterior to the posterior endpoint of SC (blue arrow). The SC area: drawn freehand and depicted as the area surrounded by the outline of the SC (yellow outline). The TM width: the distance between the scleral spur and Schwalbe’s line (white arrow). The TM thickness: two measurements made at the anterior endpoint of SC and halfway down SC (red lines), the average of them is calculated as TM thickness