Study Evaluating the Efficacy of Administration of Cyclosporine (Low Dose and High Dose) and Prednisolone Acetate Compared to Its Components and Vehicle in Patients With Allergic Conjunctivitis

Inclusion Criteria: * history of ocular allergies and a positive skin test reaction to perennial allergens within the past 24 months and a history of chronic eye irritation * visual acuity score ≥ 0.60 (EDTS) * negative urine pregnancy test for female patients, and use of adequate birth control throughout the study period. Exclusion Criteria: * active ocular infection; preauricular lymphadenopathy or ocular condition that could affect study; glaucoma or abnormal intraocular pressure; ocular surgery within past 3 months; history of asthma, pregnancy or nursing * contraindications or known allergies to the study drug(s)