polyol is generally between about 1 0 1 and about 1 1 and is especially between about 1 0 25 and about 1 0 75 some borate polyol complexes such as potassium borotartrate are commercially available the borate polyol complexes are utilized in the compositions of the present invention in an amount between about 0 5 to about 6 0 percent by weight wt preferably between about 1 0 to about 2 5 wt the optimum amount however will depend upon the complexity of the product since potential interactions may occur with the other components of a composition such optimum amount can be readily determined by one skilled in the formulatory arts the compositions of the present invention useful with rgps or compositions such as eye drops gels or ocular inserts will preferably also contain pva or other viscosity enhancing polymers such as cellulosic polymers or carboxy vinyl polymers pva is available in a number of grades each differing in degree of polymerization percent of hydrolysis and residual acetate content such differences affect the physical and chemical behavior of the different grades pva can be divided into two broad categories i e completely hydrolyzed and partially hydrolyzed those containing 4 residual acetate content or less are referred to as completely hydrolyzed partially hydrolyzed grades usually contain 20 or more residual acetate the molecular weight of pva 39 s lo vary from 20 000.