Question

What is PH value of tears?

Answer 1

Normal human tear pH by direct measurement. 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.....................

Answer 2

Normal human tear has a pH range of 6.5 to 7.6 with a mean value of 7.0.