| Grade | Description | Conclusion |
| 0 | No reaction | Negative |
| 1 | Ecchymosis, blood extravasation on the eyelid related to the injection | Negative |
| 2 | No swelling, variable degree of erythema | Negative |
| 3 | Varying degree of erythema with minimal swelling, slight swelling without erythema | Suspicious |
| 4 | Moderate swelling with drooping of the eyelid, variable degree of erythema | Positive |
| 5 | Severe swelling and/or necrosis of eyelid | Positive |