Electrochemical Changes Associated with the Formation of the Aqueous Humour.

IF it is granted that the aqueous humour is formed by the active transfer of solutes and solvent from the plasma to the aqueous, it follows that the rates of transfer of the various solvent or solute species and the steady-state composition of the aqueous will depend upon the electrochemical potential difference (P.D.) across its boundaries with the plasma. Alterations of the electrochemical P.D. should modify the transfer processes from blood to aqueous and, conversely, metabolic inhibitors which affect aqueous humour formation are likely to alter the electrochemical P.D. Thus, the electrochemical P.D. between two solutions in a common solvent, separated by a membrane is: