[Short and long-term hypotensive effect of timolol-gel and latanoprost instillation in normal-tension glaucoma].

Purpose: To confirm the predictive value of the results of a 4-week trial of latanoprost alone, timolol-gel alone, or a combination of the two in normal-tension glaucoma (NTG) patients, when compared with the hypotensive response after a 6-month trial using the same combination of eye drops for the same patients.
Methods: One eye each of 45 NTG patients was used in a prospective 4-week trial of latanoprost alone, timolol-gel alone, or a combination of the two. Patients continued using the eye drops for 6 months, according to the results of the trial. The correlation of the results of the 6-moth use and the baseline data, and the baseline data and the results of the 4-week trial were evaluated by the paired-t test.
Results: The intraocular pressure(IOP)s of patients using timolol-gel alone were 13.9 mmHg at the base line, 9.7 mmHg after the trial, and 12.0 mmHg after 6-month use(baseline, trial: p < 0.05). IOPs when using latanoprost alone were 15.3 mmHg at baseline, 11.7 mmHg after the trial, and 11.5 mmHg after 6-month use(baseline: p < 0.05, trial: p = 0.33). IOPs using timolol-gel and latanoprost in combination were 14.8 mmHg at baseline, 11.4 mmHg after the trial, and 12.0 mmHg after 6-month use (baseline: p < 0:05, trial: p = 0.14).
Conclusion: The result of the 4-weeks trial of latanoprost alone or in combination with timolol-gel can be indicative of the IOP after 6-month use.