Restoring retinal autophagy halts glaucoma-driven neurodegeneration

The research reveals that glaucoma is not merely a pressure problem but a collapse in the cellular recycling system that maintains healthy mitochondria in retinal cells. When chronic elevated intraocular pressure impairs autophagy—the process by which cells eliminate damaged mitochondria—defective organelles accumulate, generating oxidative stress and progressive neuronal death. Investigators demonstrated in glucocorticoid-induced and myocilin-associated glaucoma mouse models that chronic pressure elevation significantly reduces mitophagy flux before retinal ganglion cell loss occurs. Pharmacological intervention with Torin 2, an mTOR inhibitor, reversed this deterioration: it restored mitochondrial health and prevented neurodegeneration in both mouse models and ex vivo human retinal explants. For those pursuing visual longevity strategies, this finding opens an entirely new pathway: not merely controlling pressure, but actively restoring retinal cells' capacity for self-repair.