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Table 5 Corneal topographic changes according to chalazion size

From: Effects of chalazia on corneal astigmatism

 

Control

Small

Medium

Large

p-value

n

70

14

17

11

 

Gender (M:F)

33:37

5:9

6:11

7:4

 

Age (year)

42.86 ± 14.18

43.64 ± 19.08

38.47 ± 10.72

38.36 ± 10.00

0.543

CCT (μm)

547.46 ± 37.69

539.29 ± 27.84

555.29 ± 34.43

535.91 ± 60.86

0.526

Average keratometry by ARK (D)

43.03 ± 1.72

43.66 ± 1.01

42.71 ± 2.11

42.09 ± 2.96

0.224

Astigmatism by ARK (D)

-0.79 ± 0.58

−0.85 ± 0.88

−0.89 ± 1.67

−1.20 ± 1.82

0.688

Axis by ARK (°)

101.48 ± 65.26

108.33 ± 50.24

113.75 ± 66.37

121.00 ± 55.42

0.714

SimK (D)

42.96 ± 4.08

43.07 ± 1.11

42.23 ± 2.30

42.05 ± 3.41

0.767

Astigmatism by simK (D)

1.17 ± 0.78

1.05 ± 0.67

1.69 ± 1.43

1.82 ± 1.13

0.037*

Axis by simK (°)

84.47 ± 39.20

89.93 ± 39.47

80.76 ± 26.52

84.45 ± 13.91

0.917

Mean K of posterior surface (D)

−6.29 ± 0.28

−6.23 ± 0.19

−6.25 ± 0.27

−6.30 ± 0.29

0.858

Astigmatism of posterior surface (D)

−0.43 ± 0.32

−0.34 ± 0.12

−0.54 ± 0.36

−0.48 ± 0.14

0.322

Total RMS (μm)

1.71 ± 0.59

1.77 ± 0.96

1.90 ± 1.05

2.33 ± 1.24

0.113

2nd order aberration (μm)

1.48 ± 0.55

1.34 ± 0.37

1.68 ± 1.04

2.06 ± 1.00

0.036*

Oblique astigmatism (Z−2 2; μm)

−0.05 ± 0.45

0.09 ± 0.48

0.09 ± 0.50

0.49 ± 0.55

0.006*

Defocus (Z0 2; μm)

−0.87 ± 0.49

−0.89 ± 0.31

−0.94 ± 0.15

−0.56 ± 0.96

0.222

Vertical astigmatism (Z2 2; μm)

−0.59 ± 0.98

−0.20 ± 0.87

−1.15 ± 1.21

−1.60 ± 1.01

0.002*

3rd order aberration (μm)

0.64 ± 0.34

0.63 ± 0.30

0.64 ± 0.44

0.94 ± 0.84

0.169

Vertical trefoil (Z−3 3; μm)

−0.14 ± 0.37

−0.24 ± 0.34

−0.23 ± 0.43

−0.26 ± 0.60

0.691

Vertical Coma (Z−1 3; μm)

0.48 ± 3.84

0.01 ± 0.37

0.18 ± 0.42

0.22 ± 0.30

0.947

Horizontal coma (Z1 3; μm)

−0.04 ± 0.33

−0.11 ± 0.32

0.03 ± 0.24

−0.01 ± 0.33

0.632

Oblique trefoil (Z3 3; μm)

−0.01 ± 0.35

−0.04 ± 0.28

−0.02 ± 0.35

−0.19 ± 0.98

0.619

4th order aberration (μm)

0.40 ± 0.30

0.29 ± 0.18

0.38 ± 0.21

0.58 ± 0.45

0.094

Oblique quadrefoil (Z−4 4; μm)

0.00 ± 0.07

0.04 ± 0.12

−0.00 ± 0.05

0.05 ± 0.14

0.296

Oblique secondary astigmatism (Z−2 4; μm)

0.01 ± 0.11

0.01 ± 0.13

−0.02 ± 0.11

−0.06 ± 0.17

0.264

Primary spherical (Z0 4; μm)

0.16 ± 0.30

0.10 ± 0.09

0.20 ± 0.26

0.22 ± 0.54

0.739

Vetical secondary astigmatism (Z2 4; μm)

0.08 ± 0.18

0.05 ± 0.16

0.03 ± 0.19

0.06 ± 0.22

0.840

Vertical quadrefoil (Z4 4; μm)

−0.12 ± 0.24

−0.09 ± 0.18

−0.09 ± 0.21

−0.15 ± 0.31

0.903

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

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