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Summary of central epithelial thickness changes.
| CCT in microns | Mean | Standard deviation | Maximum | Minimum |
|---|---|---|---|---|
| Preoperative Pentacam CCT | 514.9 | ±33.12 | 561 | 470 |
| Preoperative USP CCT | 506.85 | ±35.4 | 559 | 459 |
| USP CCT after epithelial removal | 474.9 | ±39.75 | 535 | 420 |
| USP CCT after riboflavin | 445.7 | ±31.18 | 508 | 400 |
| USP CCT after UVA | 444.65 | ±34.53 | 521 | 400 |
CCT: central corneal thickness, USP: ultrasound pachymetry, and UVA: ultraviolet.
