Reproducibility of Scleral Spur Identification and Angle Measurements Using Fourier Domain Anterior Segment Optical Coherence Tomography

Table 3

Mean (± standard deviation) of TISA750 (mm²) and AOD750 (mm) from both sessions by the glaucoma specialist and their differences.

	Session 1	Session 2	Difference
TISA750 (mm^2)
All eyes
All quadrants	0.1722 ± 0.1774	0.1666 ± 0.1724	0.0056 ± 0.0325
Nasal	0.1772 ± 0.1812	0.1721 ± 0.1763	0.0051 ± 0.0183
Temporal	0.1944 ± 0.2069	0.1880 ± 0.1975	0.0064 ± 0.0273
Superior	0.1550 ± 0.1676	0.1427 ± 0.1521	0.0123 ± 0.0336
Inferior	0.1622 ± 0.1559	0.1634 ± 0.1659	−0.0012 ± 0.0450
Open-angle eyes
All quadrants	0.3370 ± 0.1775	0.3283 ± 0.1711	0.0087 ± 0.0493
Nasal	0.3373 ± 0.1884	0.3290 ± 0.1847	0.0083 ± 0.0228
Temporal	0.3785 ± 0.2248	0.3644 ± 0.2140	0.0141 ± 0.0394
Superior	0.3226 ± 0.1527	0.3002 ± 0.1262	0.0224 ± 0.0515
Inferior	0.3095 ± 0.1495	0.3197 ± 0.1640	−0.0102 ± 0.0710
Nonopen-angle eyes
All quadrants	0.0681 ± 0.0590	0.0644 ± 0.0555	0.0037 ± 0.0141
Nasal	0.0760 ± 0.0717	0.0730 ± 0.0647	0.0030 ± 0.0151
Temporal	0.0781 ± 0.0597	0.0766 ± 0.0567	0.0015 ± 0.0152
Superior	0.0491 ± 0.0445	0.0433 ± 0.0431	0.0059 ± 0.0123
Inferior	0.0692 ± 0.0570	0.0647 ± 0.0537	0.0045 ± 0.0143
AOD750 (mm)
All eyes
All quadrants	0.400 ± 0.401	0.384 ± 0.375	0.016 ± 0.109
Nasal	0.433 ± 0.419	0.411 ± 0.403	0.022 ± 0.053
Temporal	0.448 ± 0.495	0.412 ± 0.414	0.035 ± 0.182
Superior	0.358 ± 0.349	0.340 ± 0.329	0.018 ± 0.050
Inferior	0.360 ± 0.330	0.371 ± 0.362	−0.011 ± 0.096
Open-angle eyes
All quadrants	0.768 ± 0.408	0.738 ± 0.367	0.030 ± 0.171
Nasal	0.801 ± 0.446	0.766 ± 0.429	0.035 ± 0.075
Temporal	0.901 ± 0.524	0.808 ± 0.410	0.093 ± 0.287
Superior	0.708 ± 0.309	0.676 ± 0.281	0.032 ± 0.066
Inferior	0.662 ± 0.327	0.702 ± 0.364	−0.040 ± 0.150
Nonopen-angle eyes
All quadrants	0.167 ± 0.131	0.160 ± 0.123	0.008 ± 0.034
Nasal	0.201 ± 0.154	0.187 ± 0.146	0.015 ± 0.034
Temporal	0.161 ± 0.130	0.162 ± 0.109	−0.001 ± 0.037
Superior	0.138 ± 0.108	0.128 ± 0.099	0.009 ± 0.035
Inferior	0.169 ± 0.129	0.162 ± 0.134	0.008 ± 0.030