Once your grandpa has suffered from cataracts which may have something unclear at the front part of eyeballs, you should take great notice of. The surgery could be the best way to get rid of it and make the eyes get healthy. About the eye drops with anti-inflammation could only release the cataracts. You need to let your grandpa have the good rest. At the same time, he should eat more food with vitamin C. There are a lot of foods with vitamin C that you could know. You could take some fresh vegetables, like spinach, vegetable, leek, green peppers, cucumber, pakchoi, broccoli and cauliflower with fresh jujubes. There are also a lot of fruits rich in vitamin C. He could eat kiwi, hawthorn, grapefruit, strawberries, oranges, lemons and so on. Keeping the eyes moisture is so vital for your grandpa. He need to take one of the above foods every day.