. "Other solutes suitable for adjustment of osmolality include sugars, for example dextrose, manitol, xylitol, and sucrose. [0094] The composition of the invention optionally further includes at least one ophthalmically acceptable pH adjusting agent and/or buffer, including an acid such as acetic, boric, citric, lactic, phosphoric and hydrochloric acids; a base such as sodium hydroxide, sodium phosph" . . .