Vision loss in older adults may stem from a fundamental breakdown in how the eye's immune system maintains order. While the retina was once thought to be shielded from immune activity, new evidence reveals it operates as a complex immunological battlefield where aging tips the balance from protective surveillance toward destructive inflammation. This shift appears central to age-related macular degeneration, the leading cause of blindness in developed nations. The research identifies complement proteins C5a as key inflammatory triggers that stimulate T-cells to release damaging cytokines including interleukin-17 and IL-22. These molecules directly injure retinal tissue while recruiting additional immune cells that amplify the destruction. Retinal pigment epithelial cells, which normally maintain the blood-retina barrier, begin expressing immune signaling molecules and the regulatory protein FOXP3 when stressed. Meanwhile, resident microglia lose their protective function as inflammatory monocytes infiltrate the tissue. The complement system compounds this damage through synaptic pruning, where C1q and C3 proteins tag neural connections for elimination. Under normal circumstances, Complement Factor H prevents excessive pruning, particularly when bound to apolipoprotein E. However, genetic variants affecting these regulatory mechanisms appear to predispose individuals to macular degeneration. This immune dysregulation framework suggests that anti-inflammatory interventions targeting complement activation or cytokine production could preserve vision in aging adults. The findings challenge traditional approaches focused solely on vascular changes, pointing instead toward immunomodulation as a therapeutic strategy. Understanding these pathways may eventually enable early intervention before irreversible retinal damage occurs, potentially transforming treatment of age-related eye diseases.