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Table 1 Stages of the reactions to the conjunctival provocation test (CPT) according to Riechelmann et al. [18]

From: Early nonreactivity in the conjunctival provocation test predicts beneficial outcome of sublingual immunotherapy

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