The described invention provides a method for reducing visual loss and for treating one or more of adverse consequence of an eye disease, including abnormal intraocular pressure, retinal vascular disease, retinal ganglion cell death, or a combination thereof in order to reduce visual loss. The method entails providing a flowable particulate composition that contains a particulate formulation comprising a plurality of particles of uniform size distribution, a therapeutic amount of a therapeutic agent selected from a voltage-gated calcium channel antagonist, an endothelin receptor antagonist, or a combination thereof, and optionally an additional therapeutic agent, wherein the particles are of uniform size distribution, and wherein each particle comprises a matrix and a pharmaceutically acceptable carrier. The pharmaceutical composition is characterized by: dispersal of the therapeutic agent throughout each particle, adsorption of the therapeutic agent onto the particles, or placement of the therapeutic agent in a core surrounded by a coating, sustained release of the therapeutic agent and optionally the additional therapeutic agent from the composition, and a local therapeutic effect that is effective to reduce signs or symptoms of the adverse consequence without entering systemic circulation in an amount to cause unwanted side effects. The method further entails administering a therapeutic amount of the pharmaceutical composition by a means for administration at a site of administration. The administering includes topically, parenterally, or by implantation. Sites of administration include intraocularly, intraorbitally, or into subconjunctival space.
