Ocular Tolerance and Intraocular Pressure (IOP) Effects of Zylet Versus Tobradex

Inclusion Criteria: * in good general health based on investigator judgment * able and willing to follow instructions, provide informed consent, make the required study visits, and use an electronic patient diary during the study * possessing a best corrected visual acuity of at least 20/40 in each eye * for females, using reliable contraception and a negative urine pregnancy test prior to study entry Exclusion Criteria: * contact lenses worn within 30 days prior to enrollment or during study period * known hypersensitivity to study medication or any component * presence of significant ocular or systemic disease that might interfere with the interpretation of the results * a need for administration of chronic topical ocular or systemic medications of any kind during the study. * participation in an opthalmic drug or device research study within 30 days prior to entry