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NEI 40th Anniversary

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Clinical study. Clinical trial. Clinical protocol. They all mean the same thing--a scientific study of how a new medicine or treatment works in people. The National Eye Institute (NEI) conducts or sponsors clinical studies to find new ways to understand, treat or prevent eye disease and vision loss. Clinical studies in vision research have led to new medicines and surgeries that have saved or improved sight for thousands of people.

Clinical studies depend on people who volunteer. Read more about what's expected if you participate in a clinical trial.

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Clinical Studies

Interested in Being a Study Participant?

Talk to your health care provider about whether a clinical study is right for you.

Interested in Clinical Trial Results?

Interested in Finding Out What's Been Funded?

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This page was last modified in November 2009

U. S. Department of Health and Human Services

National Institutes of Health

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