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Table 4 Surgically induced astigmatism (SIA) determined using different keratometric measurement approaches in 3 subgroups classified according to preoperative steep axis. (WTR: 32 eyes; oblique: 13 eyes; ATR: 24 eyes) Arithmetic SIAs were calculated by the vector method

From: Comparison of surgically induced astigmatism between anterior and total cornea in 2.2 mm steep meridian incision cataract surgery

  

Arithmetic SIA

∆J0

∆J45

Flattening (diopter)

Torque

(dioter)

Mean diopter

± SD

Range

(diopter)

Median

(diopter)

* p value

** p value

Mean diopter

± SD

* p value

** p value

Mean diopter

± SD

* p value

** p value

WTR

Automated K

0.43 ± 0.33

0–1.44

0.36

 

0.07

0.14 ± 0.16

 

0.06

−0.02 ± 0.17

 

0.65

0.29 ± 0.34

0.00 ± 0.31

Scheimpflug Anterior K

0.54 ± 0.37

0–1.63

0.47

0.07

 

0.18 ± 0.20

0.06

 

−0.03 ± 0.19

0.65

 

0.42 ± 0.39

0.02 ± 0.33

Scheimpflug Posterior K

0.12 ± 0.07

0–0.27

0.11

<  0.001

<  0.001

0.00 ± 0.06

< 0.001

< 0.001

0.00 ± 0.04

0.79

0.50

0.02 ± 0.10

0.01 ± 0.10

Scheimpflug EKR 3.0-mm

0.69 ± 0.44

0.11–2.18

0.74

0.001

0.002

0.17 ± 0.27

0.53

0.50

−0.02 ± 0.25

0.97

0.70

0.47 ± 0.54

0.02 ± 0.39

Scheimpflug EKR 4.5-mm

0.58 ± 0.30

0.08–1.13

0.59

0.026

0.09

0.16 ± 0.20

0.58

0.14

0.00 ± 0.21

0.78

0.33

0.42 ± 0.39

0.00 ± 0.30

Scheimpflug TCRP 2.0-mm ring

0.71 ± 0.51

0.14–2.64

0.62

<  0.001

<  0.001

0.21 ± 0.31

0.09

0.38

−0.01 ± 0.24

0.99

0.79

0.52 ± 0.61

−0.02 ± 0.35

Scheimpflug TCRP 3.0-mm zone

0.67 ± 0.42

0.06–2.08

0.65

<  0.001

0.002

0.18 ± 0.27

0.22

0.99

−0.02 ± 0.23

0.90

0.96

0.47 ± 0.53

−0.01 ± 0.35

Scheimpflug TCRP 4.0-mm zone

0.54 ± 0.34

0.01–1.39

0.58

0.06

0.67

0.17 ± 0.20

0.35

0.39

−0.01 ± 0.19

0.84

0.72

0.43 ± 0.42

0.00 ± 0.23

oblique

Automated K

0.37 ± 0.19

0.07–0.69

0.42

 

0.38

0.01 ± 0.19

 

0.13

−0.01 ± 0.10

 

0.92

0.17 ± 0.17

−0.10 ± 0.34

Scheimpflug Anterior K

0.43 ± 0.20

0.10–0.67

0.50

0.38

 

0.09 ± 0.15

0.13

 

−0.01 ± 0.17

0.92

 

0.27 ± 0.18

0.11 ± 0.34

Scheimpflug Posterior K

0.13 ± 0.09

0.01–0.26

0.11

<  0.001

<  0.001

0.00 ± 0.05

0.86

0.08

−0.03 ± 0.05

0.92

0.97

0.01 ± 0.09

−0.07 ± 0.11

Scheimpflug EKR 3.0-mm

0.60 ± 0.25

0.20–0.96

0.60

0.055

0.035

0.07 ± 0.26

0.75

0.75

−0.04 ± 0.19

0.70

0.42

0.21 ± 0.41

0.06 ± 0.48

Scheimpflug EKR 4.5-mm

0.49 ± 0.24

0.06–0.84

0.51

0.13

0.046

0.07 ± 0.26

0.46

0.86

−0.06 ± 0.16

0.13

0.20

0.25 ± 0.31

−0.03 ± 0.40

Scheimpflug TCRP 2.0-mm ring

0.70 ± 0.29

0.20–1.31

0.69

0.005

0.001

0.11 ± 0.30

0.22

0.70

−0.07 ± 0.22

0.17

0.42

0.28 ± 0.43

0.23 ± 0.54

Scheimpflug TCRP 3.0-mm zone

0.60 ± 0.21

0.19–0.94

0.65

0.019

0.002

0.12 ± 0.21

0.15

0.51

−0.05 ± 0.21

0.42

0.22

0.22 ± 0.29

0.23 ± 0.48

Scheimpflug TCRP 4.0-mm zone

0.48 ± 0.19

0.24–0.79

0.52

0.09

0.09

0.10 ± 0.17

0.12

0.86

−0.04 ± 0.18

0.25

0.38

0.27 ± 0.24

0.12 ± 0.38

ATR

Automated K

0.39 ± 0.21

0.05–0.99

0.35

 

0.93

−0.07 ± 0.18

 

0.98

−0.02 ± 0.12

 

0.06

0.19 ± 0.33

0.01 ± 0.24

Scheimpflug Anterior K

0.38 ± 0.21

0.10–0.88

0.33

0.93

 

−0.07 ± 0.14

0.98

 

0.05 ± 0.15

0.06

 

0.27 ± 0.24

0.05 ± 0.25

Scheimpflug Posterior K

0.13 ± 0.07

0–0.29

0.11

<  0.001

<  0.001

0.02 ± 0.06

0.034

0.009

0.00 ± 0.05

0.93

0.12

−0.00 ± 0.12

−0.01 ± 0.09

Scheimpflug EKR 3.0-mm

0.55 ± 0.26

0.15–1.17

0.47

0.043

0.006

−0.02 ± 0.22

0.55

0.42

0.01 ± 0.21

0.80

0.38

0.23 ± 0.44

0.01 ± 0.35

Scheimpflug EKR 4.5-mm

0.45 ± 0.27

0.02–1.16

0.41

0.48

0.25

−0.05 ± 0.19

0.80

0.93

0.00 ± 0.18

0.84

0.20

0.22 ± 0.37

−0.04 ± 0.32

Scheimpflug TCRP 2.0-mm ring

0.63 ± 0.49

0.14–2.36

0.47

0.08

0.009

0.01 ± 0.32

0.61

0.15

0.04 ± 0.24

0.35

0.80

0.30 ± 0.44

0.11 ± 0.59

Scheimpflug TCRP 3.0-mm zone

0.53 ± 0.37

0.10–1.74

0.38

0.21

0.032

0.00 ± 0.26

0.61

0.06

0.03 ± 0.19

0.55

0.51

0.18 ± 0.50

0.05 ± 0.38

Scheimpflug TCRP 4.0-mm zone

0.44 ± 0.28

0.13–1.19

0.40

0.53

0.17

−0.07 ± 0.21

0.46

0.38

0.04 ± 0.15

0.25

0.61

0.19 ± 0.41

0.02 ± 0.29

  1. SD standard deviation
  2. * p-value for comparison with Automated K in each group
  3. ** p-value for comparison with Scheimpflug Anterior K in each group