Purpose A brief review of normal tear function and changes resulting from disease. Methods The factors contributing to normal tear physiological function are considered, and the effect of changes in ...

Tears have a wide range of functions that are critical to ocular health and emotional regulation. Each type of tear has a slightly different biochemical structure and content specialized to their ...

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In 2013, American photographer Rose-Lynn Fisher used an electron microscope to capture the structure of 100 different human tears. She shared her stunning findings in a book and on her blog, revealing ...

Crying is essential for eye health. It’s a natural biological process that helps you express and process pain and emotions. And no matter how frequently you shed tears, you might be wondering if ...

Ad Vingerhoets is Professor of Clinical Psychology (Emotions and Wellbeing), Tilburg University, The Netherlands You have gained an international reputation for your research on crying. What first got ...

Most of us think of tears as a human phenomenon, part of the complex fabric of human emotion. But they’re not just for crying: All vertebrates, even reptiles and birds, have tears, which are critical ...