Finis D, Pischel N, Schrader S, et al.: Evaluation of lipid layer thickness measurement of the tear film as a diagnostic tool for Meibomian gland dysfunction. Cornea, 32: 1549-1553, 2013.
Himebaugh NL, Begley CG, Bradley A, et al.: Blinking and tear break-up during four visual tasks. Optom Vis Sci, 86: E106-E114, 2009.