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Arch Ophthalmol. 1981 Feb;99(2):301.

Normal human tear pH by direct measurement.

Abstract

Tear pH was measured in 44 normal subjects by immersing the lip of a microcombination glass pH probe in the tear fluid in the inferior cul-de-sac. The normal pH range was 6.5 to 7.6; the mean value was 7.0. This method provides a rapid and accurate measure of tear pH and may better our understanding of tear physiology and tear buffering capacity.

PMID:
7469869
[Indexed for MEDLINE]

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