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Table 3 Corneal topographic data according to site of chalazion

From: Effects of chalazia on corneal astigmatism

 

Control

Upper eyelid

Lower eyelid

Both eyelids

p-value

n

70

22

16

6

 

Gender (M:F)

33:37

10:12

3:13

6:0

 

Age (year)

42.86 ± 14.18

41.27 ± 12.41

38.63 ± 16.74

35.83 ± 11.16

0.519

CCT (μm)

547.46 ± 37.69

5583.27 ± 42.50

528.25 ± 45.57

555.00 ± 28.33

0.136

Average keratometry by ARK (D)

43.03 ± 1.72

43.38 ± 1.69

42.18 ± 2.58

42.82 ± 1.44

0.269

Astigmatism by ARK (D)

-0.79 ± 0.58

−1.12 ± 1.93

−0.88 ± 0.85

−0.50 ± 0.45

0.490

Axis by ARK (°)

101.48 ± 65.26

118.16 ± 67.99

102.50 ± 53.94

92.00 ± 57.73

0.750

SimK (D)

42.96 ± 4.08

43.11 ± 1.69

41.51 ± 2.99

42.42 ± 1.21

0.470

Astigmatism by simK (D)

1.17 ± 0.78

2.01 ± 1.27

0.98 ± 0.59

1.23 ± 1.26

0.001*

Axis by simK (°)

84.47 ± 39.20

83.05 ± 25.31

88.31 ± 27.04

84.50 ± 43.78

0.470

Mean K of posterior surface (D)

−6.29 ± 0.28

−6.29 ± 0.29

−6.24 ± 0.15

−6.16 ± 0.25

0.653

Astigmatism of posterior surface (D)

−0.43 ± 0.32

−0.53 ± 0.32

−0.36 ± 0.13

−0.42 ± 0.16

0.336

Total RMS (μm)

1.71 ± 0.59

2.35 ± 1.13

1.46 ± 0.39

1.96 ± 1.47

0.002*

2nd order aberration (μm)

1.48 ± 0.55

2.11 ± 1.04

1.23 ± 0.31

1.24 ± 0.20

<0.001*

Oblique astigmatism (Z−2 2; μm)

−0.05 ± 0.45

0.33 ± 0.57

−0.03 ± 0.40

0.21 ± 0.43

0.009*

Defocus (Z0 2; μm)

−0.87 ± 0.49

−0.79 ± 0.72

−0.82 ± 0.25

−0.99 ± 0.10

0.820

Vertical astigmatism (Z2 2; μm)

−0.59 ± 0.98

−1.55 ± 1.28

−0.48 ± 0.69

−0.25 ± 0.62

0.001*

3rd order aberration (μm)

0.64 ± 0.34

0.85 ± 0.68

0.55 ± 0.17

0.62 ± 0.43

0.129

Vertical trefoil (Z−3 3; μm)

−0.14 ± 0.37

−0.28 ± 0.54

−0.16 ± 0.21

−0.31 ± 0.50

0.470

Vertical Coma (Z−1 3; μm)

0.48 ± 3.84

0.23 ± 0.41

−0.02 ± 0.31

0.18 ± 0.30

0.939

Horizontal coma (Z1 3; μm)

−0.04 ± 0.33

−0.025 ± 0.29

−0.13 ± 0.31

0.13 ± 0.15

0.398

Oblique trefoil (Z3 3; μm)

−0.01 ± 0.35

−0.16 ± 0.72

−0.01 ± 0.28

0.14 ± 0.30

0.332

4th order aberration (μm)

0.40 ± 0.30

0.44 ± 0.21

0.39 ± 0.40

0.30 ± 0.27

0.802

Oblique quadrefoil (Z−4 4; μm)

0.00 ± 0.07

0.03 ± 0.14

0.02 ± 0.05

−0.02 ± 0.03

0.422

Oblique secondary astigmatism (Z−2 4; μm)

0.01 ± 0.11

−0.02 ± 0.16

−0.00 ± 0.11

0.03 ± 0.15

0.618

Primary spherical (Z0 4; μm)

0.16 ± 0.30

0.10 ± 0.23

0.29 ± 0.43

0.11 ± 0.09

0.243

Vetical secondary astigmatism (Z2 4; μm)

0.08 ± 0.18

0.10 ± 0.21

−0.01 ± 0.16

0.02 ± 0.06

0.230

Vertical quadrefoil (Z4 4; μm)

−0.12 ± 0.24

−0.13 ± 0.25

−0.07 ± 0.11

−0.15 ± 0.33

0.876

  1. SimK simulated keratometry, ARK autorefractokeratometry, RMS root mean square, D diopter; Results were presented as mean ± standard deviation
  2. *Statistically significant by ANOVA