The Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study

Status unconfirmed

Conditions studied: Keratoconus

In brief

To describe the clinical course of keratoconus and to describe the relationships among its visual and physiological manifestations, including high- and low-contrast visual acuity, corneal curvature, slit lamp biomicroscopic findings, corneal scarring, and quality of life. To identify risk factors and protective factors that influence the severity and progression of keratoconus.

Key facts

Study ID

NCT00000155

Run by

National Eye Institute (NEI)

Starts

1995-06-01

Last updated by the study team

2005-06-24

Who can join

Age: 12 and older. Sex: any. Healthy volunteers: not accepted.

Where it is running

• University of California, Berkeley, School of Optometry — Berkeley, California, United States
• Southern California College of Optometry — Fullerton, California, United States
• Jules Stein Eye Institute, University of California at Los Angeles — Los Angeles, California, United States
• Nova Southeastern University, Health Professions Division, College of Optometry — Fort Lauderdale, Florida, United States
• University of Illinois at Chicago, Department of Ophthalmology and Visual Sciences — Chicago, Illinois, United States
• Indiana University, School of Optometry — Bloomington, Indiana, United States
• University of Missouri-St. Louis, School of Optometry — St Louis, Missouri, United States
• SUNY State College of Optometry — New York, New York, United States
• University Hospitals of Cleveland, Department of Ophthalmology — Cleveland, Ohio, United States
• The Ohio State University, College of Optometry — Columbus, Ohio, United States
• Pennsylvania College of Optometry, The Eye Institute — Philadelphia, Pennsylvania, United States
• Northeastern Eye Institute — Scranton, Pennsylvania, United States
• University of Utah, John Moran Eye Center — Salt Lake City, Utah, United States
• Gundersen Lutheran — La Crosse, Wisconsin, United States

Full record on ClinicalTrials.gov

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