pH of Secretion in Normal Conjunctival Sac Determined by Glass Electrode

Summary

The pH of the conjunctival surfaces can be determined by placing a specially designed glass electrode in direct contact with the conjunctiva. The method is adaptable to clinical use. A study on 88 normal adults is reported. The results indicate that stimulation of lacrimation results in increased alkalinity of the conjunctival surfaces. A larger series must be studied to establish normal values of pH prior to the onset of lacrimation for it is possible that, with further experience and speed of manipulation, the initial pH determination will show a smaller range and a more nearly neutral reaction.