Fullerenol Eye Drops Mitigate UVB-Induced Cataract Progression by Inhibiting Oxidative Stress and Cellular Senescence

Cataracts remain the leading cause of blindness worldwide, and surgery is currently the only effective clinical treatment, as no pharmacological therapy has yet been validated. Here, we explore Fullerenol, a hydroxylated fullerene derivative formulated as eye drops, as a potential nanomedicine for delaying cataract onset and progression. In UVB-induced mouse cataract models, topical Fullerenol preserved the lens transparency and histological structure. In human lens epithelial cells, Fullerenol reduced the oxidative stress, restored the mitochondrial function, alleviated the DNA damage, and suppressed the cellular senescence. RNA sequencing and pathway enrichment analyses further indicated that Fullerenol modulated the oxidative stress- and senescence-associated signaling pathways, including MAPK and TGF-β cascades, while downregulating the p53–CDKN1A (p21) axis. These findings provide new evidence that Fullerenol can mitigate photo-oxidative damage and age-related cellular dysfunction, highlighting its promise as a non-invasive and clinically translatable nanomedicine strategy for cataract management.