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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: J Cataract Refract Surg. 2011 Nov 4;38(1):108–116. doi: 10.1016/j.jcrs.2011.06.037

Figure 1.

Figure 1

Automated measurement of iris thickness (IT750), angle opening distance (AOD500), I-Curv, trabecular-iris space area (TISA500), corneal curvature of anterior and posterior surface (AC-Curv, PC-Curv). The distance between point A and point B is the iris thickness at 750 μm (IT750). The distance between point E and point F is the AOD 500 μm from scleral spur (AOD500). Iris curvature (I-Curv) is determined by creating a line from the most peripheral to the pupillary end of the iris, and the perpendicular distance from this line to the most convex point along the posterior iris surface (point C to D) is defined as I-Curv. The trabecular–iris space area 500 (TISA500) is an area bounded anteriorly by the AOD 500 line, posteriorly by a line drawn from the scleral spur perpendicular to the plane of the inner scleral wall to the opposing iris, superiorly by the inner corneoscleral wall and inferiorly by the iris surface.