This is a phase 2 study that will consist of 4 visits over a 5 week period. Drug will be evaluated using the conjunctival allergen challenge model of allergic conjunctivitis.

Inclusion Criteria:

• 18 years of age of either sex and any race
• positive history of ocular allergies and a positive skin test reaction to cat hair, cat dander, dog dander, grasses, ragweed, trees, dust mites, and/or cockroaches within the past 24 months
• able and willing to avoid all disallowed medication for the washout period and during the study

Exclusion Criteria:

• active ocular infection or skin condition
• ocular surgery within the past 3 months
• pregnancy or nursing