Injecting the right fatty acids could one day turn back the clock on aging eyes—and maybe even the immune system. Credit: Shutterstock Changes in eyesight are one of the most common signs of aging. Sit in a dimly lit restaurant with someone over 60, and you will likely hear them say, "Hold on -- let me pull out my cell phone. I need more light to read the menu!" But what if that gradual decline in vision could be reversed? Researchers at the University of California, Irvine are now exploring