Reproducibility of Scleral Spur Identification and Angle Measurements Using Fourier Domain Anterior Segment Optical Coherence Tomography
Figure 1
Anterior chamber angle measurements and scleral spur landmark (SSL). Illustrations are angle opening distance (AOD) and trabecular-iris space area (TISA) for an (a) open angle and (b) nonopen angle. AOD is defined as the length of a line drawn perpendicular to the cornea anterior to the SSL and ending on the anterior surface of the iris. TISA is the area bordered centrally by the AOD line, anteriorly by the posterior corneoscleral-aqueous interface, and posteriorly by the anterior surface of the iris. The peripheral border is a line segment starting at the SSL perpendicular to the corneoscleral-aqueous interface and ending on the anterior surface of the iris.
