Table 1.

Preoperative and postoperative data

	Preoperative data		Postoperative data
	Range	Mean ± SD	Range	Mean ± SD
Refraction	−2 to −8	−5.07 ± 2.1	−0.25 to 1.00	−0.24 ± 0.62
BCVA	0.7–1.00	0.80 ± 0.20	0.7–1.00	0.83 ± 0.18
Pachymetry	500–588	540 ± 6.3	407–563	470.5 ± 8.9
Anterior Q-value	−0.02 to −0.59	−0.3 ± 0.2	0.04–1.55	0.7 ± 0.3
Posterior Q-value	−0.50 to 0.38	−0.02 ± 0.16	−0.03 to 0.65	0.2 ± 0.14
Anterior Km	42.1–46.5	43.6 ± 1.38	34.7–42.6	38.8 ± 2.1
Posterior Km	−6.1 to −7.00	−6.34 ± 0.30	−5.9 to −6.9	−6.34 ± 0.27
Rh anterior surface	7.36–8.21	7.8 ± 0.2	7.97–9.74	8.7 ± 0.4
Rv anterior surface	7.06–8.18	7.6 ± 0.3	7.87–9.48	8.6 ± 0.5
Rh posterior surface	5.92–6.95	6.5 ± 0.3	5.97–7.02	6.5 ± 0.25
Rv posterior surface	5.45–6.61	6.1 ± 0.3	5.49–6.59	6.1 ± 0.3

Abbreviations: BCVA, best corrected visual acuity; Rh, maximum radius of curvature; Rv, minimum radius of curvature; SD, standard deviation; Km, mean keratometric power.