I ran out of zinc and didn't bother to get more as I wanted to wait and see if I could see any difference without it. I have been noticing a decline in my up close vision for about a year or so (I'm 42 and everyone says that is "normal), but I have also recently noticed a decline in distant vision. I know that zinc is supposed to be good to prevent macular degeneration and cateracts and such, but does anyone know about zinc being important for healthy vision?