Table 2.
Summary of the intrasession repeatability outcomes for the corneal astigmatism and axis measurements obtained by means of the VX120 system depending on the magnitude of corneal astigmatism.
| S w | Corneal astigmatism ≤0.75 D | Corneal astigmatism >0.75 D | p value |
|---|---|---|---|
| K AST (D) | 0.10 | 0.13 | 0.148 |
| K ASTAX (°) | 7.25 | 3.44 | 0.001 |
| 3KAST (D) | 0.15 | 0.28 | 0.001 |
| 3KASTAX (°) | 14.72 | 5.92 | 0.001 |
| 5KAST (D) | 0.11 | 0.19 | 0.002 |
| 5KASTAX (°) | 8.25 | 4.19 | 0.002 |
| 7KAST (D) | 0.13 | 0.15 | 0.090 |
| 7KASTAX (°) | 9.43 | 6.42 | 0.002 |
Mean keratometric astigmatism (KAST) and its axis (KASTAX), mean astigmatism (3KAST) and its axis (3KASTAX) in a 3 mm central zone, mean astigmatism (5KAST) and its axis (5KASTAX) in a 5 mm central zone, and mean astigmatism (7KAST) and its axis (7KASTAX) in a 7 mm central zone.