Grading scales for clinical signs
| Signs | Score | Definition |
|---|---|---|
| Palpebral conjunctiva Hyperaemia | 3 | Impossible to distinguish individual blood vessels |
| 2 | Dilatation of many vessels | |
| 1 | Dilatation of several vessels | |
| 0 | None | |
| Oedema | 3 | Diffuse oedema with opacity |
| 2 | Thinner diffuse oedema | |
| 1 | Slight oedema | |
| 0 | None | |
| Follicles | 3 | 20 or more follicles |
| 2 | 10–19 follicles | |
| 1 | 1–9 follicles | |
| 0 | None | |
| Papillae | 3 | Papillae size: 0.6 mm or more |
| 2 | Papillae size: 0.3–0.5 mm | |
| 1 | Papillae size: 0.1–0.2 mm | |
| 0 | None | |
| Giant papillae (papillae size ≥1 mm) | 3 | Elevated papillae in 1/2 or more of the upper palpebral conjunctiva |
| 2 | Elevated papillae in <1/2 of the upper palpebral conjunctiva | |
| 1 | Flat papillae | |
| 0 | None | |
| Bulbar conjunctiva Hyperaemia | 3 | Diffuse dilated blood vessels over the entire bulbar conjunctiva |
| 2 | Dilatation of many vessels | |
| 1 | Dilatation of several vessels | |
| 0 | None | |
| Oedema | 3 | Bullous oedema |
| 2 | Thinner diffuse oedema | |
| 1 | Localised oedema | |
| 0 | None | |
| Limbus Trantas’ dot | 3 | 9 or more dots |
| 2 | 5–8 dots | |
| 1 | 1–4 dots | |
| 0 | None | |
| Swelling | 3 | Found in 2/3 or more of the limbal circumference |
| 2 | Found in 1/3 to <2/3 of the limbal circumference | |
| 1 | Found in <1/3 of the limbal circumference | |
| 0 | None | |
| Corneal epithelial signs | 3 | Shield ulcer or corneal erosion |
| 2 | Exfoliation superficial punctate keratitis | |
| 1 | Superficial punctate keratitis | |
| 0 | None |