Table 2.
Reported incidence of post-LASIK and post-PRK ectasia with and without identifiable preoperative risk factors
| Procedure | Study | Year | Country | Reported rate of ectasia | Reported incidence (%) | Rate of ectasia w/o RF | Incidence w/o RF (%) |
|---|---|---|---|---|---|---|---|
| LASIK | Pallikaris et al. [1] | 2001 | Greece | 19/2873 | 0.661 | – | – |
| Randleman et al. [3] | 2003 | US | 1/2500 | 0.040 | 3/50,000 | 0.006 | |
| Rad et al. [146] | 2004 | Iran | 14/6941 | 0.202 | – | – | |
| Reinstein et al. [147] | 2006 | UK | 6/5212 | 0.115 | – | – | |
| Condon et al. [6] | 2007 | Ireland | 1/107 | 0.935 | – | – | |
| Spadea et al. [89] | 2012 | Italy | 23/4027 | 0.571 | – | – | |
| Moshirfar et al. [85] | 2014 | US | 5/1992 | 0.251 | 1/1992 | 0.050 | |
| Bohac et al. [45] | 2018 | Croatia | 10/30,167 | 0.033 | – | – | |
| Chua et al. [52] | 2019 | Singapore | 12/53,731 | 0.022 | – | – | |
| Schallhorn et al. [5] | 2020 | UK | 8/61,833 | 0.013 | – | – | |
| PRK | Sorkin et al. [13] | 2019 | Israel | 9/3105 | 0.290 | – | – |
| Schallhorn et al. [5] | 2020 | UK | 1/9467 | 0.011 | – | – |
RF risk factor, PRK photorefractive keratectomy, LASIK laser-assisted in situ keratomileusis, SMILE small-incision lenticule extraction