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| Group | No of subjects (n) | Mean age (years) | Concentration(mg/ml) | Applications per day | Preservative | Concentration (mg/ml) of benzalkonium chloride |
| Control | 10 | 76 (6) | – | – | – | – |
| Timolol | 10 | 75 (7) | 5.0 | Twice | BAC | 0.1 |
| Latanoprost | 10 | 74 (10) | 0.05 | Once | BAC | 0.2 |
