Figure 4.

Tomey Casia 2 AS-OCT scans (Nagoya, Japan) showing iris thickness (A), area (B), and curvature (C) from a patient with narrow angles. (A) The iris thickness (IT) is the thickness of the iris at different distances from the SS. In the example, IT measured at 750 microns (IT750) from the scleral spur (white, bold vertical line). (B) The iris area is defined as the entire cross-sectional area of the iris, from the SS to the pupil. (C) The iris curvature is the perpendicular distance from the iris-pigmented epithelium at the point of greatest convexity to a line between the most peripheral and the most central points of the iris-pigmented epithelium (white, bold vertical line).