Figure 2
From: Methods of measuring the iridocorneal angle in tomographic images of the anterior segment of the eye
Methods of measuring the iridocorneal angle. a) AOD 500 (Angel Opening Distance) involves measuring a distance between a point of the cornea which is 500 μm away from the scleral spur and the opposite point of the iris. b) TIA (Trabecular-Iris Angle) involves a direct measurement of the angle. c) TISA 500 (Trabecular-Iris Space Area) involves measuring an area covering 500 μm located in the area bounded by the cornea and the iris.