Figure 1.

AS-OCT (anterior segment optical coherence tomography): quantitative measurements of angle parameters: green dot: scleral spur, connecting point between the posterior curvature of the cornea and the curvature of the sclera. yellow dot: linear distance of 500 um anterior to the scleral spur which marks the location of the trabecular meshwork, white dot: linear distance of 750 um anterior to the scleral spur which covers a more extensive area surrounding the trabecular meshwork. AOD 500 and AOD 750: Linear distance from the cornea to the iris at 500 and 750 um from the scleral spur, respectively. TISA 500 and TISA 750: Area of trapezoid between iris and cornea from sclera to 500 um and 750 um, respectively.