One-Year Visual and Refractive Outcomes following LASIK for Myopia and Myopic Astigmatism with MEL 90 versus Schwind Amaris 750S Excimer Laser: A Comparative Study

Table 3

Subgroup analysis of eyes with high myopia (−6 D and above).

Parameter (mean ± SD) (range)	Schwind Amaris 750S (n = 26)	MEL 90 (n = 31)	value
Preop SE	−6.19 ± 0.71 (−6.15 to −9.00)	−6.79 ± 0.70 (−6 to −8.75)	0.30
Postop SE	−0.31 ± 0.17 (0 to −0.625)	−0.29 ± 0.27 (−1.00 to 0.50)	0.66
Postop UDVA	−0.03 ± 0.09 (−0.2 to 0.20)	−0.03 ± 0.06 (0 to −0.20)	0.99
Postop CDVA	−0.11 ± 0.07 (0 to −0.20)	−0.08 ± 0.08 (0 to −0.20)	0.20
Safety index	1.18 ± 0.19 (1 to 1.60)	1.10 ± 0.18 (0.90 to 1.60)	0.11
Efficacy index	0.99 ± 0.09 (0.63 to 1.28)	0.99 ± 0.12 (0.625 to 1.25)	0.93