Table 2. Comparison of perimetric parameters between eyes with and without parafoveal scotoma in early myopic normal tension glaucoma.
| Perimetric parameters | All (n=99) | With parafoveal scotoma (n=42) | Without parafoveal scotoma (n=57) | P-valuea |
|---|---|---|---|---|
| MD, dB | −3.29±1.70 | −3.75±1.72 | −2.94±1.62 | 0.018 |
| PSD, dB | 6.08±2.97 | 6.14±2.98 | 6.03±2.99 | 0.859 |
| VFI, % | 91.24±5.45 | 88.29±5.68 | 93.42±4.12 | <0.001 |
| Central average TD, dB | −3.10±4.08 | −6.40±4.30 | −0.67±1.20 | <0.001 |
| Parafoveal average TD, dB | −4.03±3.52 | −6.56±3.20 | −2.17±2.44 | <0.001 |
| Nasal peripheral average TD, dB | −5.87±4.31 | −5.25±4.01 | −6.32±4.50 | <0.001 |
| Superior defect, n(%) | 68 (68.69) | 36 (85.71) | 32 (56.14) | 0.007 |
Abbreviations: dB, decibel; MD, mean deviation; PSD, pattern standard deviation; TD, total deviation; VFI, visual field index.
a
P-value for comparison between the eyes with and without parafoveal scotoma groups using independent t-test, X2-test, or Fisher’s exact test, as appropriate.