| to the preservation of sight | 10 | purpose |
| in preventing the tear film | 7 | purpose |
| to healing | 4 | purpose |
| eyelid → be → essential | 9 |
| eyelid → be → vital | 9 |
| eyelid → be → important | 7 |
| negative | neutral | positive |
| 0.085 | 0.522 | 0.394 |
| Raw frequency | 25 |
| Normalized frequency | 0.471 |
| Modifier score | 0.500 |
| Perplexity | 240.812 |