Tearscope-Plus: A Portable Option In Measuring Tear Break Up Time.

Twenty patients had the tear break up time measured in their right eye by the Tearscope-plus, utilizing the magnifier, the blue filter, and coarse grid options. The results were compared to the tear break up time measured by the traditional slit lamp method. Both methods required the use of fluorescein prior to measurement. The results showed that either method is accurate, and could be compared. The measurements were within 1.7 seconds, with a standard deviation of +/-1 .3 seconds. The Tearscope-plus, therefore, is a good alternative to measuring TBUT if a portable option is desired.