Table 2.

Comparison of anterior elevation at 4 mm and 7 mm from the center before and 3 months after LASIK

Anterior elevation	Preoperative	Three months postoperative	P-value
Central 4 mm
Range	−25 to 7	−3 to 50	0.001
Mean ± SD	−4.4 ± 7.5	25.9 ± 13.3
Peripheral 7 mm
Range	−108 to 14	72–244	0.001
Mean ± SD	−59.4 ± 29.6	168.5 ± 54.3

Abbreviations: SD, standard deviation; LASIK, laser-assisted in situ keratomileusis.