We updated the design of this site on December 18, 2017. Learn more.
ClinicalTrials.gov Menu

Ocular Hypertension Treatment Study (OHTS) (OHTS)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00000125
Recruitment Status : Active, not recruiting
First Posted : September 24, 1999
Results First Posted : March 19, 2015
Last Update Posted : December 16, 2016
National Eye Institute (NEI)
Information provided by (Responsible Party):
Michael Kass, Washington University School of Medicine

Brief Summary:

To determine whether medical reduction of intraocular pressure prevents or delays the onset of glaucomatous visual field loss and/or optic disc damage in ocular hypertensive participants judged to be at moderate risk for developing open-angle glaucoma.

To produce natural history data to assist in identifying patients at most risk for developing open-angle glaucoma and those most likely to benefit from early medical treatment.

To quantify risk factors for developing open-angle glaucoma among ocular hypertensive individuals.

Condition or disease Intervention/treatment Phase
Ocular Hypertension Glaucoma Drug: Topical ocular hypotensive eye drops. Phase 3

  Show Detailed Description

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 1636 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Ocular Hypertension Treatment Study (OHTS)
Study Start Date : February 1994
Primary Completion Date : June 2002
Estimated Study Completion Date : March 2020

Resource links provided by the National Library of Medicine

U.S. FDA Resources

Arm Intervention/treatment
No Intervention: Observation
Close Observation.
Participants treated with commercially available topical ocular hypotensive eye drops.
Drug: Topical ocular hypotensive eye drops.
Topical ocular hypotensive eye drops.

Primary Outcome Measures :
  1. Incidence of Primary Open-Angle Glaucoma in Hypotensive Patients [ Time Frame: 5 yrs (OHTS I, June 2002) and 13.0 yrs (completion of both phases of OHTS, March 2009) ]
    Comparison of the cumulative proportion of participants who develop primary open-angle glaucoma in the observation and medication groups.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   40 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Men and nonpregnant women between the ages of 40 and 80 with IOP greater than or equal to 24 mm Hg but less than or equal to 32 mm Hg in at least one eye and IOP greater than or equal to 21 but less than or equal to 32 mm Hg in the fellow eye, as well as normal visual fields and optic discs are eligible for the trial. Patients presenting with best-corrected visual acuity worse than 20/40 in either eye, previous intraocular surgery, a life-threatening or debilitating disease, secondary causes of elevated IOP, angle-closure glaucoma or anatomically narrow angles, other diseases that can cause visual field loss, background diabetic retinopathy, optic disc abnormalities that can produce visual field loss or obscure the interpretation of the optic disc, or unwillingness to undergo random assignment are excluded from the trial.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00000125

Sponsors and Collaborators
Washington University School of Medicine
National Eye Institute (NEI)
Study Chair: Michael A Kass, MD Washington University Department of Ophthalmology and Visual Sciences

Additional Information:

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Responsible Party: Michael Kass, Professor, Ophthalmology and Visual Sciences, Washington University School of Medicine
ClinicalTrials.gov Identifier: NCT00000125     History of Changes
Other Study ID Numbers: NEI-24
5U10EY009307-16 ( U.S. NIH Grant/Contract )
5U10EY009341-14 ( U.S. NIH Grant/Contract )
First Posted: September 24, 1999    Key Record Dates
Results First Posted: March 19, 2015
Last Update Posted: December 16, 2016
Last Verified: December 2016

Additional relevant MeSH terms:
Ocular Hypertension
Vascular Diseases
Cardiovascular Diseases
Eye Diseases
Ophthalmic Solutions
Antihypertensive Agents
Pharmaceutical Solutions
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Nasal Decongestants
Vasoconstrictor Agents
Respiratory System Agents