can lead to vision loss in the form of conditions such as age-related macular degeneration and hyperferritinemia syndrome, according to recent research findings. Hyperferritinemia means high ferritin in the blood). Normally the RPE has ways to prevent iron from entering the retina when iron levels are high, but if iron export from cells is unregulated, iron may accumulate in the eye and degrade the macula. Iron contributes to the leading causes of vision loss. Oftentimes the storage protein for iron, ferritin, can reach the eye instead of the mineral itself.