Fig. 2.

Definition of collector channels. (a) A hyporeflective band (interphase shadow) is seen on anterior segment OCT that is believed to be the trabecular meshwork.⁹ (b) Given its OCT low reflectivity status, it can be confused for aqueous humor outflow pathway lumens on automated segmentation as an anterior pointing collector channel (CC). Therefore, CCs were defined as, if arising from the dorsal portion of SC, arising only on the dorsal 50% of SC and with an angle $\theta$ of 15 to 115 deg to avoid the hyporeflective band. Also, an angle $\theta$ of 15 to 170 deg was acceptable if CC arose from the posterior tip of Schlemm’s canal (SC) because CC arising in-line from the posterior tip of SC could not be distinguished from an extra-long SC.