Retinal microglia cells can be found in the outer nuclear layer, outer plexiform layer, inner plexiform layer, ganglion cell layer and nerve fiber layer. Microglial cells,which have a "double-edged sword" feature, are closely related to the development and prognosis of many retinal diseases. Mieroglia cell has become a hot field on department of ophthalmology in recent years. This paper reviews the research progress on funcition of retinal microglia cells a...