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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: J Cataract Refract Surg. 2012 Oct 13;38(12):2125–2130. doi: 10.1016/j.jcrs.2012.07.034

Table 1.

Endothelial cell variables before and after LASIK.

Parameter Mean ± SD
Before LASIK (21 Paired Eyes) 3 Y Postop (19 Paired Eyes) 5 Y Postop (17 Paired Eyes) MDD* (%)
ECD (cells/mm2) 120
 Femtosecond laser 2758 ± 406 2760 ± 383 2829 ± 317
 Mechanical microkeratome 2773 ± 399 2796 ± 398 2853 ± 355
Hexagonal cells (%) 5
 Femtosecond laser 59 ± 8 57 ± 8 57 ± 7
 Mechanical microkeratome 59 ± 6 58 ± 6 57 ± 6
CoV of cell area (%) 2
 Femtosecond laser 32 ± 6 32 ± 4 31 ± 4
 Mechanical microkeratome 32 ± 6 32 ± 3 32 ± 3

CoV = coefficient of variation; ECD = endothelial cell density; MDD = mean minimum detectable difference

*

Determined because there were no significant differences in any variable at any examination between treatments (P = .99)