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001, r = -0.554 and p less then .001, r = -0.528; respectively). There was no significant correlation between Schirmer test and tear osmolarity.Conclusion It is important to use a sensitive, reproducible and non-invasive method in the evaluation of tear functions. We think that the objective and noninvasive topographic NI-BUT measurements and the minimally invasive osmolarity measurements should be used more frequently in practice because they are correlated with the measurements obtained by invasive methods and should be widespread in