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  • Title: A comparison of long-term intraocular pressure fluctuation in patients treated with bimatoprost or latanoprost.
    Author: Simmons ST, Bernstein P, Hollander DA.
    Journal: Am J Ophthalmol; 2008 Sep; 146(3):473-7. PubMed ID: 18561893.
    Abstract:
    PURPOSE: To evaluate long-term intraocular pressure (IOP) fluctuation in patients with glaucoma or ocular hypertension treated with bimatoprost or latanoprost. DESIGN: Post hoc analysis of prospectively collected data from a previously reported multicenter, investigator-masked, randomized clinical trial of bimatoprost and latanoprost. METHODS: Patients were treated bilaterally with bimatoprost (n = 133) or latanoprost (n = 136) for six months. IOP measurements were taken at 8 am, 12 pm, and 4 pm at baseline, week 1, and months 1, 3, and 6. Long-term IOP fluctuation during treatment was determined as the standard deviation (SD) of all 12 follow-up measurements. RESULTS: There was no significant between-group difference in short-term daily IOP fluctuation at baseline. Long-term IOP fluctuation over six months of treatment [mean SD (range SD)] was 1.9 (0.5 to 6.3) mm Hg with latanoprost vs 1.7 (0.5 to 3.9) mm Hg with bimatoprost (P = .050). Latanoprost-treated eyes were more likely than bimatoprost-treated eyes to have long-term IOP fluctuation of > or =3 mm Hg (7.8% vs 2.5% of eyes; P = .009). CONCLUSIONS: Bimatoprost-treated eyes demonstrated less long-term fluctuation in IOP compared with latanoprost-treated eyes in this six-month study. Additional studies are needed to confirm these findings and to determine their impact on glaucomatous progression.
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