Scientists find a hidden retinal defense against vision loss

Many diseases that lead to vision loss have something important in common: they gradually damage the retina, the layer of light-sensitive tissue at the back of the eye that makes sight possible. Scientists understand many of the physical changes that occur as retinal degeneration progresses, but they know far less about the chemical signals that influence how the retina reacts to injury.

Researchers at Scripps Research, working with scientists at UC San Diego and the Lowy Medical Research Institute, have now identified a naturally occurring molecule called erucamide that appears to help coordinate communication between cells in the retina. In a study published in Nature Neuroscience on June 19, 2026, the team found that erucamide levels decline as photoreceptors, the light-sensing cells responsible for detecting visual information, begin to die.