Table 4.
Distribution of eyes according to ERSS scores for each risk parameter based on refractive surgery type
| Parameter | Points | |||||
|---|---|---|---|---|---|---|
| 4 | 3 | 2 | 1 | 0 | ||
| PRK | Age | – | 13.9% | 25.0% | – | 61.1% |
| Topography | 5.9% | 38.2% | – | 14.7% | 41.2% | |
| MRSE | – | 3.0% | – | 15.2% | 81.8% | |
| Pachymetry | 6.3% | 12.5% | 50.0% | – | 31.3% | |
| RSB | – | – | – | 9.1% | 90.9% | |
| LASIK | Age | – | 5.2% | 8.6% | 18.3% | 52.4% |
| Topography | – | 9.5% | – | 13.8% | 46.6% | |
| MRSE | 8.4% | 6.2% | 5.8% | 9.3% | 56.9% | |
| Pachymetry | 2.3% | 5.2% | 20.7% | – | 56.3% | |
| RSB | 16.6% | 16.0% | 10.9% | 11.4% | 26.3% | |
| SMILE | Age | – | – | 45.5% | 27.3% | 27.3% |
| Topography | 11.1% | – | – | 11.1% | 77.8% | |
| MRSE | – | – | – | 28.6% | 71.4% | |
| Pachymetry | – | – | – | – | 100.0% | |
| RSB | – | – | – | 28.6% | 71.4% | |
A “–” indicates 0% reported for a given parameter
PRK photorefractive keratometry, LASIK laser-assisted in situ keratomileusis, SMILE small-incision lenticule extraction, ERSS ectasia risk score system, RSB residual stromal bed, MRSE manifest refractive spherical equivalent