Table 1 Stages of the reactions to the conjunctival provocation test (CPT) according to Riechelmann et al. [18]
Stage | Findings |
|---|---|
0 | No subjective or visible reaction |
I | Itching, reddening, foreign body sensation |
II | Stage I + tearing, vasodilatation of conjunctiva bulbi |
III | Stage II + vasodilatation and erythema of conjunctiva tarsi, blepharospasm |
IV | Stage III + chemosis, lid swelling |