EPO and age-related macular degeneration: Furthermore, accumulating findings have also outlined the promising use of EPO (Zhu et al., 2009; Mok et al., 2012; Boesch et al., 2014) in the treatment of retinal degenerative diseases, such as AMD (Wang et al., 2009), retinitis pigmentosa, and diabetic retinopathy (McVicar et al., 2011).