Table 2.

Topographic changes during 1-year followup.

Parameter	Preoperative (n = 61)	12 m postoperatively (n = 61)
Precisio
PE (μm)	71.56 ± 31.31	66.48 ± 28.81 (P = 0.01)
IRI (μm)	45.45 ± 22.60	42.18 ± 22.54 (P = 0.01)
Asym (D)	9.05 ± 5.50	8.12 ± 5.58 (P = 0.01)
OPD
Mean K (D)	46.97 ± 5.21	46.77 ± 5.31 (P = 0.06)
Max K (D)	55.55 ± 6.01	54.98 ± 5.78 (P = 0.02)
DSI	10.54 ± 5.30	9.71 ± 5.01 (P = 0.00)
S 3, 5, 7	1.40 ± 0.80	1.32 ± 0.80 (P = 0.04)
S 4, 6, 8	0.33 ± 0.21	0.34 ± 0.33 (P = 0.81)
Total HOA	4.80 ± 2.93	4.54 ± 2.72 (P = 0.05)

PE: posterior elevation; IRI: irregularity index; Asym: asymmetry within 5 mm zone; DSI: differential sector index; HOA: higher order aberration.