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Table 1 Known methods for measuring the iridocorneal angle and their definitions

From: Methods of measuring the iridocorneal angle in tomographic images of the anterior segment of the eye

Method symbol Method name Definition
AOD Angle Opening Distance (Figure 2a) 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
TIA Trabecular-Iris Angle (Figure 2b) involves a direct measurement of the angle
TISA Trabecular-Iris Space Area (Figure 2c) involves measuring an area covering 500 μm located in the area bounded by the cornea and the iris