I just remembered the dark sunglasses that some senior people wear that look almost like goggles, where the sides are also covered. I have never asked what are those for, but I imagine it's for preventing degeneration.
They're designed to fit over regular prescription glasses and block light coming in peripherally. We give them to everyone after eye surgery. They're not specifically designed to prevent macular degeneration. Try them sometime, they work incredibly well. I wear them now when driving.