Intraoperative and postoperative complications rate from 1998 to 2015
| All | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | |
| Intraoperative complications | |||||||||||||||||||
| Flap-related | |||||||||||||||||||
| Button hole | 9 | - | - | 4 | - | - | 2 | 2 | - | - | 1 | - | - | - | - | - | - | - | - |
| Eccentric flap | 9 | 1 | 3 | 2 | 1 | - | - | 1 | - | - | 1 | - | - | - | - | - | - | - | - |
| Flap tear/ torn hinge | 14 | - | - | - | - | - | - | - | - | - | - | 1 | 8 | 2 | 1 | 1 | - | 1 | - |
| Incomplete flap | 71 | 3 | 2 | 3 | 2 | 2 | 2 | 6 | 12 | 12 | 13 | 5 | 3 | 2 | 2 | - | - | 2 | - |
| Decentered ablation zone | 5 | - | - | 1 | - | - | - | 3 | 1 | - | - | - | - | - | - | - | - | - | - |
| Loose epithelium/ defects | 23 | - | - | 3 | 6 | 7 | 1 | 1 | 2 | 1 | - | 1 | - | 1 | - | - | - | - | - |
| Postoperative complications | |||||||||||||||||||
| Flap-related | |||||||||||||||||||
| Dislodged flap | 68 | - | 4 | 3 | 6 | 13 | 5 | 7 | 13 | 6 | 5 | 5 | - | 1 | - | - | - | - | - |
| Significant flap striae | 166 | 2 | 1 | 3 | - | 4 | 4 | 24 | 32 | 40 | 23 | 12 | 9 | 3 | 1 | - | 3 | 3 | 2 |
| Diffuse lamellar keratitis | 90 | - | - | 2 | 2 | 1 | 2 | 1 | 3 | 2 | 67 | 3 | 6 | - | - | 1 | - | - | - |
| Infective keratitis | 3 | - | - | - | - | 1 | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - |
| Epithelial ingrowth | 66 | 2 | 3 | 9 | 4 | 1 | 1 | 9 | 9 | 15 | 2 | 3 | 3 | 1 | - | 1 | 2 | 1 | - |
| Debris at interface | 24 | - | - | - | - | - | 1 | - | 6 | 3 | 5 | 3 | 3 | - | - | 1 | 2 | - | - |
| Others | 44 | - | - | 1 | 1 | 2 | - | - | 1 | 1 | 1 | 2 | 4 | 10 | 5 | 7 | 5 | 1 | 3 |
| Total complication cases | 592 | 8 | 13 | 31 | 22 | 31 | 18 | 54 | 80 | 81 | 118 | 35 | 36 | 20 | 9 | 11 | 12 | 8 | 5 |
| Total LASIK cases | 53731 | 422 | 1615 | 2431 | 2697 | 2828 | 2879 | 4995 | 6993 | 7214 | 4399 | 3510 | 2749 | 2999 | 2381 | 1846 | 1671 | 1223 | 879 |
| Overall complication rate (%) | 1.10 | 1.90 | 0.80 | 1.28 | 0.82 | 1.10 | 0.63 | 1.08 | 1.14 | 1.12 | 2.68 | 1.00 | 1.31 | 0.67 | 0.38 | 0.60 | 0.72 | 0.65 | 0.57 |
Excluding diffuse lamellar keratitis cases in 2007, the overall complication rate in 2007 is 1.16%; the overall complication rate for 1998–2015 is 0.98%.