The eye in gastrointestinal disease

This article reviews disorders in which both gastrointestinal and ocular disease can occur. Gastrointestinal disease can affect the eye as part of the disease spectrum, and in other instances both the gastrointestinal system and the eye may be involved as part of a systemic disease process. The gastrointestinal system may be adversely affected by the treatment of an unrelated eye disease. Also, certain infections of the gastrointestinal system can have an adverse effect on the eye.