The present invention provides aqueous ophthalmic compositions in the form of solution comprising hexanoic acid, 6-(nitrooxy)-,(1S,2E)-3-[(1R,2R,3S,5R)-2-[(2Z)-7-(ethylamino)-7-oxo-2-hepten-1-yl]-3,5-dihydroxycyclopentyl]-1-(2-phenylethyl)-2-pr open-1-yl ester and macrogol 15 hydroxystearate as the only solubilizing agent, and a method for their preparation.本發明提供溶液形式的眼用水性組成物及其製備方法,所述溶液形式的眼用水性組成物包含己酸,6-(硝基氧基)-,(1S,2E)-3-[(1R,2R,3S,5R)-2-[(2Z)-7-(乙基胺基)-7-側氧基-2-庚烯-1-基]-3,5-二羥基環戊基]-1-(2-苯乙基)-2-丙烯-1-基酯和作為唯一增溶劑的羥基硬脂酸聚乙二醇15酯。