Table 2: The axial length in different DIA.

GroupCasesAxial length in the eye with less IA (mm)Axial length in the eye with larger IA (mm)t

DIA = 0 D12823.27 ± 0.99 (right eye)23.29 ± 0.96 (left eye)0.89>0.05
0 < DIA< 0.5 D29223.22 ± 0.9223.24 ± 0.950.44>0.05
DIA ≥ 0.5 D19223.17 ± 0.9523.28 ± 0.972.65<0.05

DIA: difference of internal astigmatism between both eyes; IA: internal astigmatism.