Cookie policy: This site uses cookies (small files stored on your computer) to simplify and improve your experience of this website. Cookies are small text files stored on the device you are using to access this website. For more information please take a look at our terms and conditions. Some parts of the site may not work properly if you choose not to accept cookies.

  • 1 of 3

Figure 1: The tear film

Three main layers make up the normal tear film. In 80% of people with dry eye, the cause is deficiency or instability of the lipid layer

Source