Active clinical trials for "Glaucoma"

The purpose of this study is to evaluate the safety, efficacy, and duration of effect of a single administration of Anecortave Acetate Depot for treatment of elevated intraocular pressure (IOP) in patients with open-angle glaucoma.

The purpose of this study is to evaluate the safety and efficacy of the iStent trabecular micro-bypass stent in reducing intraocular pressure (IOP) in refractory open-angle glaucoma subjects.

Vasoactivity of topical drugs may be of prognostic relevance in glaucoma. There is very little information for a major class, the prostaglandin analogues with regard to this aspect. The purpose of this study is to compare the effect of travoprost 0.004% and latanoprost 0.005% on choroidal blood flow and retinal vascular diameter in glaucoma patients. After washout of current topical medication, intraocular pressure (IOP) in both eyes (Goldmann applanation tonometry), choroidal blood flow (laser Doppler flowmetry) and retinal vessel diameter (Retinal Vessel Analyzer) in one randomly selected eye will be measured at baseline, after two weeks and after 4 weeks of treatment with travoprost or latanoprost QD, in a randomized, double masked 2-way cross-over study in 20 open angle glaucoma patients.

The objective of this study is to compare the long-term safety and efficacy of the Ahmed and the Baerveldt implants in patients who are undergoing aqueous shunt implant surgery for glaucoma. One eye of eligible patients will be randomized. Outcome measures include intraocular pressure, visual acuity, visual field, number of glaucoma medications, glaucoma reoperations, and complications, including suprachoroidal hemorrhage, endophthalmitis, choroidal effusion, diplopia, corneal edema, and shunt/tube erosion.

Glaucoma is a disease which affects between one and two percent of all individuals aged over 40 years. According to recent Canadian National Institute for the Blind figures, it is the second largest specific cause of blindness in this country. The most common form of glaucoma, open-angle glaucoma, is incipient and typically results in a progressive loss of vision without symptoms due to damage to a structure inside the eye called the optic nerve head. Although the most important known risk factor for the development of open-angle glaucoma is high intraocular pressure (the pressure within the eyeball), a number of researchers have shown that a sizeable proportion of patients continue to lose vision in spite of successful treatment to lower their intraocular pressure. This finding suggests that there may be additional risk factors involved. Ocular vasospasm (the inability of certain blood vessels to dilate and increase blood flow according to the needs the eye) and vascular disease are among other factors implicated but their roles have not yet been fully investigated. The Canadian Glaucoma Study Group proposes to investigate the role of risk factors, including vasospasm and vascular disease, involved in the progression of open-angle glaucoma. We will recruit 410 patients with open-angle glaucoma across 4 centres (Halifax, Vancouver, Montreal and Toronto) who will be treated by experienced investigative ophthalmologists according to a uniform standard protocol to ensure that all patients are managed in the same manner. The patients will be followed meticulously with the most modern and accurate tests available every four months for a period of 5 years to determine whether progression has taken place. Visual function will be measured using two techniques called conventional perimetry and blue-on-yellow perimetry, and optic nerve heads will be examined with a special scanner capable of three-dimensional imaging. By defining both the ocular and systemic profiles of patients who progress and do not progress, we may be able to identify which patients will benefit from the standard treatment of intraocular pressure reduction, such as that prescribed in the study. More importantly, we will identify the characteristics of patients who do not benefit from standard treatment, so that alternative ones may be developed. Such studies are clearly necessary, but have not yet been conducted. We believe that the proposed study will increase our knowledge of open-angle glaucoma and reduce its impact on blindness and visual disability.

This is a randomised controlled clinical trial to compare laser peripheral iridotomy (LPI) and primary phacoemulsification with intra-ocular lens implantation (phaco/IOL) in the treatment of acute primary angle-closure glaucoma (APACG). Following successful medical lowering of raised intra-ocular pressure (IOP) and control of intraocular inflammation, patients presenting to Singapore National Eye Centre and Singapore General Hospital with acute primary angle-closure glaucoma who meet the eligibility are randomised to one of the two treatment arms: laser peripheral iridotomy and primary phacoemulsification with intra-ocular lens implantation. These patients will be monitored closely for 2 years post-operatively.

The purpose of this study is to evaluate the safety and IOP-lowering efficacy of Travoprost (0.004%) compared to Latanoprost (0.005%) in patients with chronic open-angle glaucoma or ocular hypertension.

To compare the safety and IOP-lowering efficacy of TRAVATAN and XALCOM in subjects with open-angle glaucoma or ocular hypertension.

The purpose of this study is to evaluate safety and efficacy of two different IOP lowering medications after twelve months of treatment in Japanese subjects.

This study is comparing 2 medications for glaucoma and how effective they are at controlling glaucoma over the course of an entire day.