Study Evaluating the Efficacy and Safety of PRT-2761 for the Treatment of Acute and Chronic Allergic Conjunctivitis

Inclusion Criteria: * be at least 18 years old * be willing and able to avoid all disallowed medications and contact lenses * must have a pregnancy test if of childbearing potential * must be able to read an eye chart from 10 feet away Exclusion Criteria: * must not have any allergies to the study medications * must not have any ocular or non ocular condition that investigator feels will interfere with study parameters * must not have used an investigational drug or device in the past 30 days or concurrently enrolled in another investigational trial