Since several reports showed that erythropoietin (EPO) reduces cell death, axon degeneration, and oxidative stress in several models of glaucoma [303], Naguib et al. [304] developed PLGA microparticles loaded with EPO-R76E, a mutant form of EPO preserving retinal neurons and optic nerve axons, without inducing a significant increase of the haematocrit. Here, EPO is linked to glaucoma.