Table 2. Anterior segment parameters under light and dark conditions and light-dark changes (Δ) in CPACG patients (CPACG eyes vs fellow PAC/PACS eyes) and normal subjects.
| CPACG patients | Normal subjects | P Value | |||||
|---|---|---|---|---|---|---|---|
| CPACG eyes (mean±SD) | PAC/PACS eyes (mean±SD) | Normal eyes (mean±SD) | CPACG eyes vs PAC/PACS eyes* | Normal eyes vs CPACG eyes† | Normal eyes vs PAC/PACS eyes† | ||
| ACD (mm) | Light | 2.008±0.228 | 2.079±0.213 | 2.533±0.329 | 0.002 | <0.001 | <0.001 |
| Dark | 2.019±0.239 | 2.085±0.218 | 2.540±0.332 | 0.005 | <0.001 | <0.001 | |
| ΔACD | -0.010±0.043 | -0.007±0.033 | -0.008±0.028 | 0.570 | 0.776 | 0.895 | |
| ACW (mm) | Light | 11.292±0.436 | 11.353±0.405 | 11.561±0.446 | 0.058 | 0.008 | 0.030 |
| Dark | 11.218±0.409 | 11.284±0.442 | 11.520±0.418 | 0.089 | 0.002 | 0.018 | |
| ΔACW | 0.074±0.273 | 0.069±0.206 | 0.042±0.159 | 0.903 | 0.488 | 0.526 | |
| ACA (mm2) | Light | 13.248±2.114 | 13.869±2.064 | 18.084±3.239 | 0.001 | <0.001 | <0.001 |
| Dark | 13.857±2.346 | 14.668±2.298 | 19.195±3.421 | <0.001 | <0.001 | <0.001 | |
| ΔACA | -0.610±0.811 | -0.800±0.584 | -1.101±1.323 | 0.042 | 0.035 | 0.143 | |
| AOD500μm(mm) | Light | 0.105±0.058 | 0.151±0.069 | 0.359±0.080 | <0.001 | <0.001 | <0.001 |
| Dark | 0.066±0.062 | 0.079±0.059 | 0.273±0.093 | 0.106 | <0.001 | <0.001 | |
| ΔAOD500μm | 0.039±0.049 | 0.073±0.062 | 0.086±0.058 | 0.001 | <0.001 | 0.335 | |
| ARA750μm (mm2) | Light | 0.068±0.039 | 0.095±0.048 | 0.217±0.044 | <0.001 | <0.001 | <0.001 |
| Dark | 0.043±0.037 | 0.052±0.041 | 0.179±0.063 | 0.099 | <0.001 | <0.001 | |
| ΔARA750μm | 0.025±0.029 | 0.043±0.041 | 0.039±0.044 | 0.005 | 0.134 | 0.646 | |
| LV (mm) | Light | 0.800±0.226 | 0.768±0.223 | 0.432±0.233 | 0.206 | <0.001 | 0.001 |
| Dark | 0.774±0.236 | 0.736±0.223 | 0.393±0.243 | 0.201 | <0.001 | <0.001 | |
| ΔLV | 0.026±0.105 | 0.031±0.101 | 0.038±0.075 | 0.766 | 0.557 | 0.729 | |
| LT (mm) | Light | 5.041±0.355 | 5.007±0.390 | 4.780±0.399 | 0.475 | 0.002 | 0.012 |
| Dark | 5.033±0.347 | 5.029±0.438 | 4.770±0.375 | 0.942 | 0.002 | 0.007 | |
| ΔLT | 0.008±0.195 | -0.023±0.207 | 0.010±0.101 | 0.447 | 0.963 | 0.419 | |
* Paired t-test
† Independent t-test
CPACG: Chronic primary angle-closure glaucoma
PAC: Primary angle-closure
PACS: Primary angle-closure suspect
Light: Parameters in light condition
Dark: Parameters in dark condition
ACD: Anterior chamber depth
ACW: Anterior chamber width
ACA: Anterior chamber cross-sectional area
AOD500μm: Angle opening distance 500μm from the scleral spur
ARA750μm: Angle recess area 750μm from the scleral spur
LV: Lens vault
LT: Lens thickness
Δ: Changes from light to dark