Research Article

Prevalence of Corneal Astigmatism in Patients before Cataract Surgery in Western China

Table 2

Comparisons of parameters of the ARC patients by sex and age group.

GroupCYL (D) mean ± SDK1 (D) mean ± SDK2 (D) mean ± SDAL (mm) mean ± SDAstigmatism type
WTR (%)ATR (%)Oblique (%)

Sex
 Male1.32 ± 1.0643.10 ± 1.4944.25 ± 1.6023.14 ± 0.9442.3838.1219.50
 Female1.25 ± 1.0343.27 ± 1.5044.23 ± 1.6323.14 ± 0.9741.5539.4019.05
value<0.001<0.0010.450.660.36

Age
 40–491.25 ± 1.0343.05 ± 1.4744.13 ± 1.5723.15 ± 0.9942.3040.1917.51
 50–591.27 ± 1.0543.16 ± 1.5044.21 ± 1.6023.12 ± 0.9741.8638.3719.77
 60–691.29 ± 1.0943.19 ± 1.4944.24 ± 1.6223.12 ± 0.9341.9438.3719.69
 70–791.30 ± 1.0743.22 ± 1.5044.26 ± 1.6223.19 ± 0.9741.5439.2419.22
 ≥801.23 ± 0.8243.32 ± 1.5744.41 ± 1.7823.16 ± 0.9641.4541.4517.10
value0.440.0070.040.0030.77

ARC: age-related cataract; CYL: corneal astigmatism; K1: flat keratometry; K2: steep keratometry; AL: axial length; WTR: with the rule; ATR: against the rule; D: diopter.