Demographic information and a brief medical and concomitant medicine history will be obtained from the glaucoma patient's records. Qualified patients will be asked to complete a questionnaire about their symptoms. Patients will then be scheduled to undergo three standard clinical tests of the ocular surface.

Inclusion Criteria:

• Diagnosis of glaucoma;
• Other protocol-defined inclusion criteria may apply.

Exclusion Criteria:

• Inability to understand trial procedures;
• Inability to understand Informed Consent;
• Current use or use within the last 3 months of Restasis, steroids, or topical ocular non-steroidal anti-inflammatory drugs;
• Punctal plugs;
• Previous glaucoma, corneal, or conjunctival surgery;
• Other protocol-defined exclusion criteria may apply.

Patients 18 years or older with open-angle glaucoma or ocular hypertension were consecutively recruited for the study.