Responses of the Ocular Anterior Segment and Refraction to 0.5% Tropicamide in Chinese School-Aged Children of Myopia, Emmetropia, and Hyperopia
Table 2
Anterior segment parameters before and after cycloplegia among refractive groups.
Emmetropia
Hyperopia
Myopia
Pre-ACD (mm)
2.93 ± 0.23
2.81 ± 0.23
3.12 ± 0.24
Post-ACD (mm)
3.03 ± 0.22
2.99 ± 0.21
3.17 ± 0.23
ACD
0.10 ± 0.08
0.18 ± 0.10
0.06 ± 0.06
value
<0.01
<0.01
<0.01
Pre-ACV (mm3)
162.33 ± 22.82
153.90 ± 23.50
178.86 ± 28.63
Post-ACV (mm3)
174.38 ± 23.28
172.02 ± 23.60
185.10 ± 26.30
ACV
12.05 ± 10.90
18.12 ± 14.97
6.24 ± 13.23
value
<0.01
<0.01
<0.01
Pre-ACA (°)
36.94 ± 4.57
35.02 ± 4.86
38.64 ± 5.15
Post-ACA (°)
35.22 ± 7.86
35.87 ± 7.92
37.75 ± 7.66
ACA
−1.72 ± 7.38
0.85 ± 6.46
−0.89 ± 6.51
value
<0.05
0.321
0.138
Post-LT (mm)
3.43 ± 0.19
3.46 ± 0.19
3.31 ± 0.18
Post-LP (mm)
4.75 ± 0.21
4.72 ± 0.20
4.83 ± 0.20
ACD: anterior chamber depth, ACV: anterior chamber volume, ACA: anterior chamber angle, LT: lens thickness, LP: lens position, and Δ: difference between the pre- and postparameter. compared with the emmetropia group. compared with the hyperopia group.
