Retinal cystoid edema indicates the drainage dysfunction of RMG due to the misdistribution and decreased expression levels of ion and water channels, including inwardly rectifying K+ channel 4.1 (Kir4.1) and aquaporin 4 (AQP4), affected by diabetes (Daruich et al., 2018). Here, KCNJ10 is linked to diabetes mellitus.