Szczesna, D. H., Iskander, D. R., & Kasprzak, H. T. (2011). Evaluating the Clinical Utility of Noninvasive Methods for Measuring Tear Film Surface Quality. Photonics Letters of Poland, 3(1), pp. 35–37. https://doi.org/10.4302/photon. lett. pl.v3i1.190