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Dry Eye Disease Severity Grading
| Clinical Testing | Negative Control |
Mild Grade 1 |
Moderate Grade 2 |
Moderately Severe Grade 3 |
Severe Grade 4 |
|---|---|---|---|---|---|
| OSDI score | <13 | ≥13 | ≥13 | ≥13 | ≥13 |
| TFBUT, s | >10 | ≤10 | ≤10 | ≤5 | 0 (Immediate) |
| Staining (0–5) | 0 (None) | 0 (None) | 1 to 2 | 3 | ≥4 |
| Schirmer, mm/5 min | >10 | ≤10 | ≤10 | ≤5 | ≤2 |
