Oysters provide 605% of the RDI of zinc, which along with vitamin A produces melanin, a pigment that protects your eyes. Thus, oysters help avoid poor night vision, night blindness, and cataracts. High doses of zinc slow the progression of macular degeneration and oysters deliver more of the mineral than most food.
Raw oysters can be a health risk, so you need to cook them properly. So if you are eating out, consume oysters only from a reputed restaurant. You can roast, broil or steam them and also add them to soups, pasta, and stews.