The purpose of this study is to demonstrate that Olopatadine 0.2% is superior to vehicle in the treatment of the signs and symptoms associated with allergic conjunctivitis or rhinoconjunctivitis.

Inclusion Criteria:

• History of seasonal allergic conjunctivitis or rhinoconjunctivitis, a positive grass antigen challenge reaction (skin test), and a positive response to grass in the Conjunctival Allergen Challenge (CAC) model

Exclusion Criteria:

• Under 10 years of age