The following undesirable effects were assessed to be treatment-related (with TRAVATAN monotherapy) and are classified according to the following convention: very common (≥ 1/ 10), common (> 1/ 100 to< 1/10), uncommon (> 1/1,000 to ≤ 1/100), rare (> 1/10,000 to ≤1/1000), or very rare (≤1/10,000).