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The Convergence Insufficiency Treatment Trial (CITT) was developed to investigate the best treatment for convergence insufficiency.

This Web site has been designed to help answer your questions about Convergence Insufficiency and the CITT study. For background information on the study, visit the About CITT page. The Frequently Asked Questions page is also a good place for getting your general questions answered.

The study is conducted at several clinic sites across the United States and is supported by a grant from the National Eye Institute, National Institutes of Health, and the Department of Health and Human Services.

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