Ophthalmic and contact lens solutions containing simple saccharides as preservative enhancers

A method for providing an ophthalmic solution comprising:

• contacting an eye with a single-part solution comprising 0.00001 to 10.0 weight percent of a simple saccharide that is a pentose;
• at least 0.00001 weight percent of a preservative with a structure given by:
• wherein n is a number between 1 and 500 and Z is a divalent bridging group;
• and
• wherein the concentration of chloride in said solution is not more than 0.2 percent by weight.

A method for providing an ophthalmic solution comprising:

• contacting an eye with a single-part solution comprising 0.00001 to 10.0 weight percent of a simple saccharide that is a hextose;
• at least 0.00001 weight percent of a preservative with a structure given by:
• wherein n is a number between 1 and 500 and Z is a divalent bridging group;
• and
• wherein the concentration of chloride in said solution is not more than 0.2 percent by weight.