Table 1.
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)