Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1977 Mar;95(3):445-8.
doi: 10.1001/archopht.1977.04450030087010.

Interpretation of tear film breakup

G T Vanley, I H Leopold, T H Gregg

Interpretation of tear film breakup

G T Vanley et al. Arch Ophthalmol. 1977 Mar.

Abstract

Tear film breakup time (BUT) was measured in 25 normal subjects on 8 different occasions over a period of one month. Reproducibility of the BUT test and factors involved in interpretation of tear film breakup were studied. It was found that of 50 eyes, the average BUT ranged from five to 100 seconds, and that there were noticeable variations (P less than or equal to .05) in an individual eye from one patient visit to the next. The BUT is not a closely reproducible phenomenon in an individual eye.

PubMed Disclaimer

LinkOut - more resources