A stable liposomal formulation for ocular delivery. The formulation contains a liposome that includes at least one lipid bilayer containing a phosphatidylcholine, and a prostaglandin F2α encapsulated in the liposome. Also provided is a method for treating an ocular disorder with the formulation.一種用於眼藥物遞送之穩定的微脂體調配物。該調配物含有一包括至少一脂雙層的微脂體,該脂雙層含有一卵磷脂;以及一被包覆於該微脂體內的前列腺素F2α。此處亦提供一種以該調配物來治療一眼疾病的方法。