Contents


Preface

Many studies have been performed to describe and to understand the correlations between the structures of the eye, also known as the "ocular surface." This book focuses on the preocular tear film, a thin layer of tears covering the cornea of the eye. It presents research on tear film physiology, its changes in various disturbances and diseases, and the influence of those changes on the ocular surface. It also presents up-to-date information on keratoconus, a condition affecting both the preocular tear film and the ocular surface in which the cornea thins and bulges

This book was made possible thanks to the collaboration of many researchers in the field of ophthalmology. I wish to thank them as well as the staff at IntechOpen for their invaluable contributions. I hope ophthalmologists, practitioners, and students will find this book interesting and useful for understanding the role of preocular

**Dr. Dorota Kopacz**

Warsaw, Poland

Warsaw, Poland

Medical University of Warsaw,

Department of Ophthalmology, Infant Jesus Teaching Hospital,

tear film in ocular surface integrity and stability.

outward.
