Cataract is one of the common eye diseases of middle-aged and elderly people, and it is also a common problem for the elderly. At the same time, because most of them use eyesight longer than in the past, the latest research report shows that cataracts can be prevented by diet.

　　Especially dark spinach, green broccoli, kale, etc., which contain specific antioxidants lutein and zeaxanthin, can protect the eyes from the damage of sunlight ultraviolet rays, and avoid cataracts, protect the eyes it is good.

　　The colors of vegetables can be divided into 4 types: green, red purple, yellow and nearly white. After analyzing the nutrients of various vegetables, scientists found that dark-colored vegetables had high nutrients and light-colored vegetables had low nutrients. They are arranged in green (dark green with the highest chlorophyll content), red purple, yellow, and white. Green vegetables include mustard, rape, greens, amaranth, spinach, celery, etc. Red-purple vegetables include purple cabbage imported from Europe, and red beetroot, purple lentils, and eggplants in my country. Yellow vegetables include tomatoes, carrots, sweet potatoes, cabbage and so on. Colorless vegetables include winter melon, melon, bamboo shoots, wild rice and cauliflower.

　　It is best to eat green vegetables to receive dark green vegetables with sufficient sunshine. Scientists have found that the same green vegetables, their nutritional value and health care effect are related to the degree of sunshine. Vitamins and interferon inducing agents in green vegetables have the weakness of "fear of heat". High temperature cooking can damage them, so it is best to eat fresh vegetables and eat them raw. Since the human body needs "all-round" nutrition, it is impossible to meet this requirement simply by eating any kind of vegetables, so only a reasonable and clever combination, and adhere to multiple varieties and colors can ensure a balanced nutrition.