Table 2 Vector analysis of astigmatic correction at 3 month after small-incision lenticule extraction with a temporal (Group 1) or superior (Group 2) opening incision using Alpins method.

Arithmetic mean ± SD (Diopters)

0.48 ± 0.21

0.53 ± 0.20

Range^a (Diopters)

0.47 to 0.50

0.52 to 0.54

Vector mean

0.23 @ 0.8°

0.25 @−6.9°

Arithmetic mean ± SD (Diopters)

0.57 ± 0.28

0.57 ± 0.25

0.991

Range^a (Diopters)

0.56 to 0.59

0.56 to 0.59

Vector mean

0.20 @ 16.5°

0.18 @ 6.5°

Arithmetic mean ± SD (Diopters)

0.27 ± 0.31

0.20 ± 0.24

Range^a (Diopters)

0.25 to 0.29

0.18 to 0.21

Vector mean

0.12 @−28.0°

0.12 @−28.9°

Arithmetic mean ± SD (Diopters)

0.09 ± 0.17

0.04 ± 0.21

0.458

Range^a (Diopters)

0.08 to 0.10

0.03 to 0.06

AE

Arithmetic mean ± SD (Degrees)

−6.9 ± 42.2

−0.39 ± 44.3

Range^a (Degrees)

−9.7 to−4.0

−3.4 to 2.6

29.8 ± 30.2

29.1 ± 32.9

Range^a (Degrees)

27.7 to 31.8

26.9 to 31.3

Geometric mean ± SD

1.17 ± 0.43

1.05 ± 0.52

Range^a

1.14 to 1.20

1.02 to 1.09

Geometric mean ± SD

0.86 ± 0.27

0.95 ± 0.55

Range^a

0.84 to 0.87

0.91 to 0.99

Geometric mean ± SD

0.75 ± 0.81

0.85 ± 1.05

Range^a

0.69 to 0.80

0.78 to 0.92

Geometric mean ± SD

0.38 ± 0.95

0.19 ± 0.83

Range^a

0.32 to 0.44

0.14 to 0.25