Clinical Study
Reproducibility of Scleral Spur Identification and Angle Measurements Using Fourier Domain Anterior Segment Optical Coherence Tomography
Table 2
Mean (± standard deviation) differences (
m) in scleral spur landmark placement.
| | All eyes () by 2 readers (with adjudicator) (m) | Open-angle eyes () by 2 readers (with adjudicator) (m) | Nonopen-angle eyes () by 2 readers (with adjudicator) (m) |
| -axis difference |
| All quadrants | −16.5* ± 53.3 (−15.5 ± 41.8) | −22.0 ± 41.6 (−11.8 ± 47.0) | −13.0 ± 59.5 (−17.8 ± 38.3) |
| Horizontal | | | | Nasal | −25.7 ± 71.9 (−19.7 ± 45.4) | −43.0 ± 52.0 (−30.0 ± 44.1) | −14.8 ± 81.5 (−13.2 ± 46.2) | Temporal | −8.7 ± 41.0 (−13.5 ± 35.2) | −13.0 ± 15.7 (−5.8 ± 33.6) | −6.0 ± 51.2 (−18.3 ± 36.3) | Vertical | | | | Superior | −20.1 ± 49.7 (−6.8 ± 46.7) | −18.7 ± 45.6 (4.7 ± 59.9) | −21.1 ± 53.3 (−14.1 ± 36.0) | Inferior | −11.4 ± 46.2 (−22.0 ± 39.2) | −13.5 ± 41.4 (−16.0 ± 45.3) | −10.1 ± 50.0 (−25.8 ± 35.6) |
| value (H versus V) | 0.8597
| 0.3283
| 0.6162
|
| -axis difference |
| All quadrants | 1.5* ± 52.8 (0.4 ± 47.6) | −8.0 ± 52.7 (−0.8 ± 59.2) | 7.5 ± 52.4 (1.2 ± 39.0) |
| Horizontal | | | | Nasal | −2.2 ± 50.5 (2.8 ± 43.7) | −14.6 ± 44.3 (−5.1 ± 33.5) | 5.6 ± 53.7 (7.8 ± 49.3) | Temporal | 10.3 ± 52.2 (5.5 ± 42.7) | 10.9 ± 47.1 (13.7 ± 54.9) | 9.9 ± 56.5 (0.4 ± 33.5) | Vertical | | | | Superior | 7.2 ± 45.4 (9.9 ± 45.6) | 5.2 ± 51.2 (19.0 ± 64.2) | 8.5 ± 42.7 (4.1 ± 29.4) | Inferior | −9.2 ± 62.1 (−16.0 ± 55.3) | −33.4 ± 60.9 (−30.8 ± 71.2) | 6.0 ± 59.4 (−7.5 ± 42.1) |
| value (H versus V) | 0.5713
| 0.4071
| 0.9670
|
|
|
*A negative mean difference indicates that observer 1 is closer to the center of the image.
|