Greenland Shark Eyes Defy Aging, Living 400 Years

Scientists have discovered that Greenland sharks can live up to 400 years while maintaining healthy eye tissue and vision. The study found that the sharks’ retinal cells remain active and that specialized proteins enable them to see blue light in the deep, dim Arctic waters. Researchers suggest that robust DNA repair mechanisms help preserve eye function over centuries. These findings may provide new insights into protecting human vision as we age, offering a potential model for longevity in ocular health.