A new study out of China and Australia showed that eyesight could be improved by a single injection into the eyeball. That sounds awful but encouraging.
Researchers found that loss of eyesight is related to excessive growth of new blood vessels at the back of the eye. The growth is related to a protein called vascular endothelial growth factor, or VEGF. There are antibodies that can be injected into the eye to stop this but it is risky and often requires multiple injections.
A newer way uses exosomes to bind the antibodies to the inflamed cells in mice and it improved more than 90 percent damage to the eyesight in mice and monkeys. Human trials of this technique are expected to begin soon but scientists are working on delivering this drug with drops because humans are understandably averse to needles in their eyeballs!