Tear pH and the hard (PMMA) contact lens patient

Abstract

Of the many properties of the eye lens environment perhaps none has remained more controversial in clinical interpretation than tear pH.This may be in part, because so little is known about it. For example, how stable is a patients tear pH throughout the day normally (i.e.pre-fitted)? How does the introduction of a hard contact lens affect this property of the tears, and is tear pH an effective predictor of a patient's adaptability to such lenses. Finally how realistic a concept is the matching of a solution pH to a patient's tears? These are some of the questions explored in this developing study of tear ph and the hard (PMMA) contact lens patient.