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. 2013 Oct 18;6(5):611–617. doi: 10.3980/j.issn.2222-3959.2013.05.11

Table 2. Preoperative characteristics of two groups.

Parameters Ziemer classic Ziemer crystal line 1P
No. of eyes 100 100
Age (a) 26.83±4.8 27.16±5.2 0.523
Spherical equivalent (D) -7.05±3.28 -6.96±2.85 0.546
Cylindric equivalent(D) -1.75±0.63 -1.68±0.72 0.671
Central thickness (µm) 525.92±28.37 527.67±31.21 0.784
Corneal curvature (D) 44.71±1.32 44.69±1.41 0.608

1Analyzed by independent samples t-test.