It is necessary for you to form good habits and grasp many skills to protect your eyes. In fact, a healthy diet can also help you protect your eyes and improve the eyesight. In your daily life, you should frequently eat the foods which contain abundant nutrients like calcium to improve the eyes. 

The formation of eyeball keeps a close relationship with calcium. A lack of calcium can not only affect the normal growth of bones, but also decrease the elasticity of the wall of eyeball and cause myopia. In order to prevent myopia in time, you should supplement adequate calcium for your body. The foods containing abundant calcium mainly include dairy products, soy bean products, egg yolks, and so on.

Chromium can effectively activate insulin and strengthen the biological effect of insulin. A lack of chromium can seriously affect the normal functions of insulin, increase the osmotic pressure of blood plasma and lens and induce myopia. Chromium widely exists in unpolished rice, animal liver, grape juice and nuts. You should increase the intake of such foods in your daily life to absorb enough chromium.

Zinc plays an important role in maintaining the normal functions of iris, retina and lens. It is also effective in maintaining the normal metabolism and transportation of vitamin A in the eyes and improving the normal eyesight for the body. A lack of zinc can seriously cause visual disturbance. Therefore, it is necessary for you to supplement adequate zinc by eating the foods like meat, liver, eggs, peanut, wheat and soy beans.

Vitamin C can effectively help the eyes alleviate the danger caused by light and oxygen so as to defer the formation of cataract. The foods like tomato and lemon contain a high content of vitamin C. You can often eat these foods to absorb the nutrient.

Vitamin A plays an important role in maintaining normal vision for you. A lack of vitamin A can seriously induce nyctalopia, xerophthalmia, keratomalacia and evenkeratohelcosis. The best sources of vitamin A include animal liver, cod-liver oil, eggs, etc. The provitamin A contained in the foods like carrot and pumpkin can be transformed into vitamin A in the body.

Kelp is also a good food to protect your eyes. The mannite contained in kelp can improve the urination, decrease the pressure in your eyes and alleviate glaucoma. Therefore, you can frequently eat kelp so as to absorb mannite.