Tearfilm and visual fatigue after smartphone use

These data are the scores of tear film break-up time (BUT), binocular fusion maintenance (BFM), and subjective questionnaire before and after 30 minutes of smartphone use.

BUT was measured by TSAS of RT7000.
BFM was measured with a self-made device.
The self-administered questionnaire is the one used in previous studies.
For the BFM and the questionnaire, please refer to previous studies of Hirota et al. (https://tvst.arvojournals.org/article.aspx?articleid=2676064).

Thanks in advance for your favor.
Masakazu Hirota