Figure 3.

Ocular itching examined after conjunctival allergen challenge. (A) Olopatadine 0.77% versus vehicle at onset and 24 hours after instillation. (B) Olopatadine 0.77% versus olopatadine 0.2% 24 hours after instillation. (C) Olopatadine 0.77% versus olopatadine 0.1% at 24 hours after instillation. *p < 0.0001 versus olopatadine 0.77%, †p < 0.05 versus olopatadine 0.77%. Ocular itching scores were assessed on a 0–4 scale with 0.5-unit increments (0, none; 4, incapacitating itch). Reproduced with permission (from Ref. 53).