Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Measurement of lipid layer thickness and blink frequency with the LipiView Interferometer (TearScience, Morrisville, NC, USA). The system provides average, maximum and minimum lipid layer thickness (LLT) values in absolute nm values, measured over a period of 20 s. In addition, blink frequency is registered, including complete and partial blinks. The arrows indicate partial blinks.
