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

Figure 2

The similarity of the high order aberrations of the 9.0 and 9.2 mm diameter flap groups. Z(3, 1): horizontal coma; Z(3, −1): vertical coma; Z(3, 3): horizontal trefoil; Z(3,−3): vertical trefoil; Z(4, 0): spherical aberration; and Z(5, −1): second order vertical coma.