Turns out, your body might already have what it takes to regrow the cells you need to see better—and scientists may have found the switch to simply turn it back on. Researchers in South Korea found a protein, PROX1, that acts sort of like a molecular gatekeeper, suppressing your body’s natural ability to regrow damaged retinal cells. When the scientists blocked PROX1 in mice, something incredible happened: they regenerated essential vision cells for a whopping six months. Watch Pop Mech editors Andrew Daniels and Manasee Wagh discuss the new discovery that could reshape how we treat blindness. Watch the full episode above now, and find more installments of the Astounding Pop Mech Show on PopularMechanics.com.