volume 16, issue 1, P44-50 1997
DOI: 10.1076/ceyr.
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Abstract: An extended exposure of 5 min to various tear lubricating solutions demonstrated significant differences in epithelial cell permeability between preserved solutions and unpreserved solutions, whereas the multiple drop application technique demonstrated all of the preservative-free solutions and some of the preserved solutions to be insignificantly different from the control solution.