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

Table 1

Frequency (%) where scleral spur landmark identification was within 80 𝜇m.

	All eyes; (𝑁=31); by 2 observers; (with adjudicator)	Open-angle eyes; (𝑁=12); by 2 observers; (with adjudicator)	Nonopen-angle eyes; (𝑁=19); by 2 observers; (with adjudicator)
𝑥-axis
All quadrants	106 (85%); (118(95%))	44 (92%); (46(96%))	62 (82%); (72(95%))
Horizontal
Nasal	25 (81%); (29(94%))	9 (75%); (11(92%))	16 (84%); (18(95%))
Temporal	28 (90%); (30(97%))	12 (100%); (12(100%))	16 (84%); (18(95%))
Vertical
Superior	25 (81%); (29(94%))	11 (92%); (11(92%))	14 (74%); (18(95%))
Inferior	28 (90%); (30(97%))	12 (100%); (12(100%))	16 (84%); (18(95%))
𝑃value; (H versus V)	1.000; (1.000)	0.3173; (1.000)	0.5271; (1.000)
𝑦-axis
All quadrants	108 (87%); (117(94%))	41 (85%); (44(92%))	67 (88%); (73(96%))
Horizontal
Nasal	29 (94%); (30(97%))	11 (92%); (12(100%))	18 (95%); (18(95%))
Temporal	28 (90%); (29(94%))	11 (92%); (11(92%))	17 (89%); (18(95%))
Vertical
Superior	27 (87%); (30(97%))	10 (83%); (11(92%))	17 (89%); (19(100%))
Inferior	24 (77%); (28(90%))	9 (75%); (10(83%))	15 (79%); (18(95%))
𝑃value; (H versus V)	0.1088; (0.7055)	0.1797; (0.3173)	0.3173; (0.5637)
Both 𝑥- and 𝑦-axes
All quadrants	96 (77%); (112(90%))	38 (79%); (42(88%))	58 (76%); (70(92%))
Horizontal
Nasal	25 (81%); (29(94%))	9 (75%); (11(92%))	16 (84%); (18(95%))
Temporal	27 (87%); (29(94%))	11 (92%); (11(92%))	16 (84%); (18(95%))
Vertical
Superior	22 (71%); (28(90%))	9 (75%); (10(83%))	13 (68%); (18(95%))
Inferior	22 (71%); (26(84%))	9 (75%); (10(83%))	13 (68%); (16(84%))
𝑃value; (H versus V)	0.1025; (0.2482)	0.4795; (0.4795)	0.1336; (0.3173)