Assessment of individual symptoms and signs
| Score | Description |
|---|---|
| *Assessed by subject; †assessed by investigator. | |
| Itching* | |
| 0 | Absent |
| 1 | An intermittent tickle sensation involving more than just the inner corner of the eye |
| 2 | A mild continuous itch (can be localised) not requiring eye rubbing |
| 3 | A definite itch, the subject would like to be able to rub eye |
| 4 | An incapacitating itch which would require significant eye rubbing |
| Tearing* | |
| 0 | Absent |
| 1 | Mild (eyes feel slightly watery) |
| 2 | Moderate (occasional need to wipe eyes) |
| 3 | Severe (tears rolling down cheeks) |
| Redness† | |
| 0 | Absent (vessels normal) |
| 1 | Mild (some vessels definitely injected above normal) |
| 2 | Moderate (diffusely red eye with individual vessels dilated but still discernible) |
| 3 | Severe (intensely red eye with intensive dilatation of conjunctival vessels which are still but not easily visible) |
| Eyelid swelling† | |
| 0 | Absent |
| 1 | Mild (lids are a little puffy) |
| 2 | Moderate (frank swelling of upper and lower lids) |
| 3 | Severe (eyelids are swollen) |
| Chemosis† | |
| 0 | Absent or visually not detectable |
| 1 | Visually evident, raised conjunctiva especially at limbal area |
| 2 | Ballooning of conjunctiva |