The purpose of this study is to determine the effect of artificial tears preserved with Benzalkonium Chloride (AT-BAK) on the IOP response to the L-PPDS and to evaluate the safety of the L-PPDS in subjects with OH or OAG following treatment.

Inclusion Criteria:

• Over 18 years with ocular hypertension or open-angle glaucoma
• Subjects who have a best-corrected visual acuity of 20/100 or better

Exclusion Criteria:

• Subjects who wear contact lenses
• Uncontrolled medical conditions
• Subjects with a known sensitivity to latanoprost, BAK, or any other products required for the study
• Subjects requiring chronic topical artificial tears, lubricants, and/or requiring any other chronic topical medications.