Safety and Efficacy of Carboxymethylcellulose for Ocular Surface Integrity in Symptomatic Dry Eye

Inclusion Criteria: * Have been using artificial tears for at least 3 months prior to study inclusion * Have been using preservative free artificial tears at least three times daily (TIB) for at least 2 weeks immediately prior to study inclusion * Having moderate to severe symptoms suggestive of dry eye Exclusion Criteria: * Current enrollment in an investigational drug or device study or participation in such a study within 3 months prior to entry into this study * Moderate to severe blepharitis * History or active signs of ocular trauma, ocular infection, or ocular inflammation within the last 3 months * History or active signs of ocular allergic disease or ocular herpes within the last year * History or active signs of severe or serious ocular conditions such as inflammatory corneal ulcers, recurrent erosions, and uveitis at any time.