Abstract:Assessing tear film properties is essential for the diagnosis of dry eye. Although tear film break-up time and Schirmer scores have been widely accepted, they are single-value parameters and unable to evaluate the dynamics of tear film in an interblink interval. We reviewed three non-invasive and objective methods, including corneal topography, interferometry and aberrometry. And we also discussed the differences between dry eye patients and normal people detected by these methods.