TABLE 1.
PREOPERATIVE CORNEAL CURVATURE AND THICKNESS CHARACTERISTICS OF MODEL EYES BY ENROLLMENT GROUP*
|
NORMAL (GROUP 0) n = 10 |
ATYPICAL (GROUP 1) n = 8 |
DISQUALIFIED (GROUP 2) n = 10 |
KERATOCONUS (GROUP 3) n = 12 |
|
|---|---|---|---|---|
| Kmax (D) | 44.14 ± 1.70 | 45.84 ± 1.93 | 44.61 ± 1.29 | 52.27 ± 8.09 |
| 40.46 - 46.92 | 43.48 - 49.43 | 43.23 - 46.75 | 41.65 - 67.82 | |
| Kmax Distance (mm) | 0.90 ± 0.59 | 1.99 ± 1.48 | 0.83 ± 0.61 | 1.09 ± 0.77 |
| 0.22 - 2.29 | 0.68 - 4.90 | 0.13 - 1.99 | 0.14 - 2.38 | |
| Kmean (D) | 43.23 ± 1.62 | 43.40 ± 1.40 | 43.65 ± 1.34 | 45.62 ± 3.26 |
| 39.72 - 45.42 | 41.64 - 46.02 | 41.91 - 45.95 | 40.68 - 50.23 | |
| Anterior Corneal Astigmatism (D) | 0.82 ± 0.40 | 3.14 ± 3.16 | 0.90 ± 0.56 | 2.79 ± 2.63 |
| 0.31 - 1.41 | 0.34 - 9.32 | 0.25 - 2.10 | 0.22 - 9.82 | |
| CCT (µm) | 567 ± 32 | 565 ± 26 | 510 ± 26 | 510 ± 56 |
| 515 - 624 | 519 - 590 | 458 - 543 | 419 - 628 | |
| Thinnest Point Value (µm) | 563 ± 32 | 559 ± 28 | 505 ± 27 | 494 ± 63 |
| 514 - 623 | 511 - 583 | 458 - 541 | 406 – 619 | |
| Thinnest Point Distance (mm) | 0.65 ± 0.24 | 1.15 ± 0.95 | 0.82 ± 0.30 | 1.03 ± 0.43 |
| 0.35 - 1.17 | 0.64 - 3.49 | 0.48 - 1.50 | 0.40 - 1.71 |
*
D = Diopters, µm = micrometers, mm = millimeters from the corneal vertex calculated as the absolute magnitude of the resultant vector of the x and y decentration of the curvature or thickness feature, CCT = central corneal thickness (at vertex). Values displayed are mean ± standard deviation and range (minimum – maximum).