The present invention relates to a topical ophthalmic formulation comprising at least one antagonist of the endothelin receptor, preferably selected from sitaxentan, ambrisentan, atrasentran, bosentan, macitentan and tezosentan, or a mixture thereof, more preferably bosentan. It also relates to the use of a topical ophthalmic formulation comprising at least one antagonist of the endothelin receptor, preferably selected from sitaxentan, ambrisentan, atrasentran, bosentan, macitentan and tezosentan, or a mixture thereof, more preferably bosentan, as active ingredient for preventing and / or treating the retinal neurodegeneration induced by diabetes and / or aging.