title: Tear pH: resistance to change.
abstract: While considerable study and clinical speculation has been given to tear pH, almost no attention has been paid to the buffering capacity of this fluid. Responses of tears to an alkaline challenge test as a measure of their buffering capacity are described here for a series of patients. The magnitudes of those resulting shifts, and the probable mechanisms influencing them are commented upon.
mesh_terms: D002021:Buffers; D006801:Humans; D012972:Sodium Hydroxide / Q000008:administration & dosage; D013666:Tears / Q000032:analysis* / Q000502:physiology
chemical_list: D002021:Buffers; D012972:Sodium Hydroxide