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Table 2 Preoperative and Postoperative Corneal Astigmatism Data (D)

From: Effect of incision on visual outcomes after implantation of a trifocal diffractive IOL

Groups

mean ± SD median (range)

Preoperation

1 Day Postoperation

2 Weeks Postoperation

1 Month Postoperation

3 Months Postoperation

P a

A1

0.37 ± 0.07

0.39 (0.23 to 0.49)

0.68 ± 0.32

0.82 (0.20 to 1.26)

0.64 ± 0.22

0.60 (0.26 to 1.05)

0.55 ± 0.17

0.55 (0.25 to 0.86)

0.42 ± 0.12

0.44 (0.22 to 0.61)

0.17

(power = 50.64%)

A2

0.73 ± 0.11

0.70 (0.58 to 0.99)

0.63 ± 0.26

0.66 (0.26 to 1.27)

0.48 ± 0.12

0.45 (0.29 to 0.86)

0.49 ± 0.09

0.54 (0.36 to 0.60)

0.44 ± 0.09

0.45 (0.25 to 0.56)

0.00

(power = 100%)

B1

0.40 ± 0.07

0.41 (0.27 to 0.49)

0.80 ± 0.46

0.88 (0.20 to 1.87)

0.66 ± 0.23

0.62 (0.26 to 1.00)

0.60 ± 0.22

0.57 (0.25 to 1.00)

0.47 ± 0.18

0.53 (0.12 to 0.88)

0.15

(power = 52.65%)

B2

0.73 ± 0.12

0.68 (0.58 to 0.99)

1.01 ± 0.38

0.91 (0.66 to 2.16)

0.79 ± 0.30

0.69 (0.48 to 1.54)

0.79 ± 0.28

0.83 (0.45 to 1.83)

0.69 ± 0.21

0.70 (0.43 to 1.35)

0.22

(power = 31.10%)

A1/B1 (P)

0.21

(power = 40.89%)

0.32

(power = 25.94%)

0.73

(power = 8.83%)

0.42

(power = 21.03%)

0.29

(power = 28.57%)

A2/B2 (P)

0.98

(power = 5.00%)

0.00

(power = 99.61%)

0.00

(power = 99.96%)

0.00

(power = 99.99%)

0.00

(power = 100%)

  1. aComparison between preoperation and 3 months postoperation