Parameter | Baseline measurement | Follow-up measurement | Mean difference (95% CI)* | P value |
In dark condition | ||||
TISA500, mm2 | 0.077±0.05 | 0.082±0.05 | −0.005 (-0.015 to 0.004) | 0.287 |
ARA750, mm2 | 0.158±0.101 | 0.164±0.091 | −0.006 (−0.026 to −0.013) | 0.548 |
IT750, mm | 0.450±0.176 | 0.473±0.897 | −0.023 (−0.05 to −0.006) | 0.119 |
Iarea, mm2 | 1.569±0.484 | 1.537±0.226 | 0.031 (−0.046 to −0.108) | 0.431 |
ACW, mm | 11.74±0.44 | 11.60±0.37 | 0.141 (0.058 to 0.224) | 0.001 |
ACA, mm2 | 18.94±2.89 | 18.51±2.94 | 0.426 (−0.168 to 1.020) | 0.160 |
LV,μm | 573.5±246.2 | 551.7±266.7 | 21.772 (−30.56 to 74.11) | 0.414 |
PD, mm | 4.32±1.14 | 4.44±0.69 | −0.124 (−0.315 to 0.068) | 0.205 |
Light-to-dark changes | ||||
ΔTISA500, mm2 | 0.022±0.032 | 0.023±0.031 | −0.001 (−0.007 to 0.006) | 0.822 |
ΔARA, mm2 | −0.045±0.065 | −0.049±0.067 | −0.004 (−0.017 to 0.009) | 0.521 |
ΔIT750, mm | −0.075±0.166 | −0.032±0.081 | −0.044 (−0.070 to −0.167) | 0.001 |
ΔIarea, mm2 | 0.270±0.414 | 0.262±0.183 | 0.009 (−0.056 to 0.075) | 0.784 |
ΔACW, mm | 0.052±0.197 | −0.006±0.166 | 0.057 (0.020 to 0.094) | 0.003 |
ΔACA, mm2 | −0.709±0.271 | −0.589±0.273 | −0.118 (−0.174 to -0.062) | < 0.001 |
ΔLV, μm | 20.4±70.9 | 15.996±75.96 | 4.4 (−10.5 to 19.3) | 0.564 |
ΔPD, mm | −1.7±1.1 | −1.3±0.9 | −0.42 (−0.63 to -0.22) | < 0.001 |
Bold indicates statistical significance.
*Parameters in 2008 minus those in 2013.
ACA, anterior chamber area; ACW, anterior chamber width; ARA, angle recess area;AS-OCT, anterior segment optical coherence tomography; IT750, iris thickness at 750 µm; Iarea, iris area; LV, lens vault; PD, pupil diameter; TISA500, trabecular iris space area at 500 µm.