Comparison of 9.0 and 9.2 mm Flap Diameter Options of Femtosecond Laser In-Situ Keratomileusis for Hypermetropia and Hypermetropic Astigmatism

Table 2

The comparison of the postoperative one-year Q value and HOAs of the 9.0 (n = 34) and 9.2 (n = 34) mm diameter flap groups.

	9.0 mm diameter flap group (mean ± SD)	9.2 mm diameter flap group (mean ± SD)	value
Q value (D)	0.98 ± 0.13 (0.65 to 1.23)	0.91 ± 0.15 (0.61 to 1.21)	0.029
Z(3, 1) (μm)	−0.25 ± 0.47 (−1.25 to 0.57)	−0.04 ± 0.39 (−0.79 to 0.86)	0.186
Z(3, −1) (μm)	0.04 ± 0.28 (−0.37 to 0.51)	0.06 ± 0.36 (−0.99 to 0.56)	0.603
Z(3, 3) (μm)	−0.19 ± 0.28 (−0.69 to 0.43)	−0.06 ± 0.30 (−0.85 to 0.58)	0.056
Z(3, −3) (μm)	0.05 ± 0.25 (−0.45 to 0.38)	0.12 ± 0.34 (−0.73 to 0.96)	0.448
Z(4, 0) (μm)	0.03 ± 0.36 (−0.87 to 0.51)	−0.02 ± 0.52 (−0.99 to 0.85)	0.866
Z(5, −1) (μm)	−0.04 ± 0.17 (−0.33 to 25)	−0.02 ± 0.17 (−0.31 to 0.25)	0.535
Total HOA	1.62 ± 0.14 (1.30 to 1.80)	1.40 ± 0.16 (1.10 to 1.60)	<0.001

HOA: high order aberration; SD: standard deviation; D: diopter.