Comparison of Efficacy of Two Groups of Glaucoma Drops (Xalatan vs.Cosopt) in Reducing Eye Pressure Following Laser (SLT)Treatment in the Management of Glaucoma.

Status unconfirmed · Not applicable

Conditions studied: Open Angle Glaucoma

In brief

WHAT IS THIS STUDY ABOUT? Glaucoma and ocular hypertension are chronic eye diseases that can damage the optic nerve and lead to vision loss or blindness. The optic nerve acts like an electric cable with over a million wires. This nerve is responsible for carrying images from the eye to the brain. The way glaucoma and ocular hypertension cause blindness depends on many factors, but the most important factor is the increased pressure inside the eye (intraocular pressure). There is no cure for glaucoma or ocular hypertension. However, lowering the pressure inside the eye has been shown to slow the progression of disease. Intraocular pressure can be lowered by glaucoma medication, laser treatment, or surgery. You have open angle glaucoma, pseudoexfoliative glaucoma, or ocular hypertension. Researchers want to find out more about how 2 drugs called Cosopt (dorzolamide hydrochloride and timolol maleate) and Xalatan (latanoprost) can help people with these conditions. Cosopt and Xalatan are both eye drops that are approved by the U.S. Food and Drug Administration (FDA) to reduce intraocular pressure in people with open angle glaucoma and ocular hypertension. The study doctor will do a laser procedure called Selective Laser Trabeculoplasty (SLT) on people in this study to help lower their intraocular pressure. The FDA has approved SLT to treat open angle glaucoma and ocular hypertension. Then the study doctor will ask some participants to use either Cosopt or Xalatan, if their intraocular pressure is still too high 4 to 6 weeks after the SLT procedure. The study doctor wants to see which of the 2 study drugs (Cosopt or Xalatan) is better at reducing intraocular pressure after SLT. It is planned that about 30 people with glaucoma or ocular hypertension who are at least 18 years old will be in this study. Out of the participants whose intraocular pressure is still too high after SLT, half will use Cosopt and half will use Xalatan. You do not have to be in this study to have SLT or to use Cosopt or Xalatan.

Key facts

Study ID: NCT00440336
Run by: Advanced Glaucoma Specialists
People needed: 30
Starts: 2006-10-01
Last updated by the study team: 2007-03-01

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

Adult subjects of either sex, of any race, eighteen years of age or older.
Diagnosis: Primary Open Angle Glaucoma, Pseudoexfoliation Glaucoma, Ocular Hypertension.
Mild to moderate glaucoma only: Pattern standard deviation (PSD); more than 1DB and less than 6 DB on Humphrey Visual Field.
Subject may be:
A newly diagnosed glaucoma or
A pre-existing glaucoma on not more than two topical antiglaucoma medications.
On no systemic medications known to increase IOP (e.g. steroids)
Visual acuity equal or better than 20/200 in the study eye
IOP less than 35 mm Hg in the study eye
No previous intraocular surgery within last 6 months, except laser PI greater than 3 months ago.

You may not qualify if…

Pigmentary OAG,
Proliferative diabetic retinopathy,
History of chronic or recurrent severe inflammatory eye disease (i.e. scleritis, uveitis, herpes keratitis),
Known allergy to COSOPT or any of Prostaglandin Analogues,
Chronic Obstructive Airways Disease (COPD),
Sinus bradycardia (heart rate < 60 beats per minute),
Second or third-degree atrioventricular block,
Overt cardiac failure.
Pregnant and nursing mothers.

Where it is running

Advanced Glaucoma Specialist — Reading, Massachusetts, United States (enrolling)

Full record on ClinicalTrials.gov

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