This study will evaluate the 24-hour IOP-lowering efficacy of 0.01% bimatoprost once daily in patients with glaucoma or ocular hypertension

Objectives To investigate the 24 h effects of bimatoprost 0.01% monotherapy on intraocular pressure (IOP) and ocular perfusion pressure (OPP).

Design Prospective, open-label experimental study.

Setting Single tertiary ophthalmic clinic.

Participants Sixteen patients with diagnosed primary open-angle glaucoma (POAG) or ocular hypertension (ages, 49-77 years).

Interventions Baseline data of 24 h IOP in untreated patients were collected in a sleep laboratory. Measurements of IOP were taken using a pneumatonometer every 2 h in the sitting and supine body positions during the 16 h diurnal/wake period and in the supine position during the 8 h nocturnal/sleep period. After baseline measurements were taken, patients were treated with bimatoprost 0.01% one time per day at bedtime for 4 weeks, and then 24 h IOP data were collected under the same laboratory conditions.

Primary outcome measure of nocturnal IOP mean under bimatoprost 0.01% treatment was compared with baseline.

Inclusion Criteria:

• primary open-angle glaucoma or ocular hypertension

Exclusion Criteria:

• Women of childbearing potential previous glaucoma surgery presence of other eye disease

4 weeks