In the quiet architecture of the human eye, researchers at Scripps Research have found that the retina does not simply surrender to disease — it fights back, using a molecule called erucamide to marshal its own immune defenses. Published in Nature Neuroscience in June 2026, the discovery reveals that erucamide levels fall as photoreceptors die, and that restoring the molecule activates protective immune cells capable of stabilizing retinal tissue and blood vessels. The finding reframes degenerative eye diseases not as passive deterioration but as a struggle the body is already engaged in — one