RESUMEN
Objective:To observe the acute toxic side effects of liposome PP 1 topically applied in eyes .Methods:PP1 liposomes (10, 60, 400 μmol· L-1 ) were used in one eye of SD rats , 4 times daily.The changes of conjunctiva , cornea and iris were observed under the slit-lamp biomicroscope , for three consecutive days , and evaluated by the stimulus score sheet of anterior segment .One week after the treatment , the corneas , irises and lenses were isolated , and their changes were observed under the light microscope .The ul-trastructural changes of corneal epithelial cells and endothelial cells were observed under the electron microscope .Results:There was a little of conjunctival secretion in one rat in the first day after the treatment with 400 μmol· L-1 PP1 liposomes, and the other rats were not irritant reaction .The corneal fluorescein staining of all rats were negative .The structures of cornea , iris, lens tissue were normal after given different concentrations of PP1 liposomes.Conclusion:PP1 liposomes at Low, medium and high concentrations show no a-cute eye toxicity in SD rats .