| usually | 15 | degree |
| like a basketball | 7 | other |
| in shape | 6 | other |
| cornea → be → spherical | 38 |
| cornea → be made → more spherical | 6 |
| cornea → become → more spherical | 3 |
| negative | neutral | positive |
| 0.128 | 0.715 | 0.156 |
| Raw frequency | 47 |
| Normalized frequency | 0.645 |
| Modifier score | 0.688 |
| Perplexity | 147.854 |