At the press conference of the leading group for epidemic prevention and control in Shanghai, it was announced that senior three and junior three of the city would return to school on April 27, and all colleges and secondary vocational schools could arrange the return of graduating students from April 27. All kinds of schools at all levels shall make preparations for other sections and grades to return to school in batches before May 6.
During the epidemic, the time for students to start school has been delayed. At present, in addition to graduating students starting to return to school, a large number of students still have to continue online classes at home. During the online classes, children need to use mobile phones, computers and iPads. For children, watching electronic screens for a long time will produce eyes for children in the growth and development stage Great harm, causing eye fatigue, near vision loss and other consequences.
As a result, Dr. Hua Haimei, director of Nutrition Department of pediatric hospital affiliated to Fudan University, specially prepared a scientific diet and eye protection book for parents and children during online classes.
According to Dr. Hua Haimei, the following nutrients and foods rich in these nutrients have a protective effect on children's eyes. Parents are suggested to supplement more nutrients for children during online classes.
1、 Provitamin A and vitamin A
Vitamin A is an important raw material for the formation of eye photosensitive substances. Vitamin A is sufficient, which can increase the smoothness of the cornea and make the eyes bright and vivid. There are two main forms of vitamin A: Pro Vitamin A (mainly β - carotene from plants) and formed vitamin A.
Beta carotene can be converted into vitamin A in the body. Therefore, fruits and vegetables containing β - carotene are good sources of vitamin A.
Vitamin A from animal food mainly exists in animal liver, cod liver oil, eggs, milk and their products; β - carotene and various carotenoids from plant food mainly exist in green leaf vegetables, yellow vegetables and fruits, such as broccoli, pea seedlings, spinach, carrots, sweet potatoes, Lycium, etc. Vitamin A contained in animal food or supplements is the formed vitamin A. if it is over supplemented, it will cause more poisoning than the original vitamin A contained in plant food.
2、 Carotenoids (lutein and zeaxanthin)
In the carotenoid family, only zeaxanthin and lutein exist in the retina of the eye. They can absorb the blue light that strongly damages the retina, protect the retina from damage, and keep the vision sensitive and clear. Foods rich in lutein include spinach, broccoli, onion, amaranth, asparagus, rape, etc. The foods rich in zeaxanthin include corn, pumpkin, orange, spinach, mustard, etc.
3、 Anthocyanin
Anthocyanin can strengthen capillaries, stabilize the microvasculature of eyes, and enhance the circulation of microvasculature. In addition, anthocyanin is also a strong antioxidant, which can reduce the damage of free radicals to the eyes and improve vision. Rich in anthocyanins: blueberry, blackberry, strawberry, grape, cherry, purple radish, carrot, pomegranate, purple rice, etc.
4、 DHA
DHA (c22:6, n-3) is the most abundant polyunsaturated fatty acid in photoreceptors of retina, which is necessary to maintain the normal function of rhodopsin. However, we can not synthesize this fatty acid by ourselves. DHA supplementation will make the vision sharper and clearer. In addition, DHA is also an important component of brain neurons. Food rich in DHA: deep sea fish, such as salmon, salmon, etc.
5、 Zinc
It can promote the metabolism and physiological function of vitamin A, and help to maintain visual health. If there is not enough zinc, it will lead to vision loss and blurred vision under low light. Zinc rich food: shellfish and mollusc seafood, animal liver, lean meat, black sesame, hazelnut, walnut, etc.
6、 Vitamin E
Vitamin E has a strong antioxidant, it can reduce the free radicals in the eyeball, play a role in protecting the eyes. Foods rich in vitamin E: all kinds of vegetable oil, nuts, beans and seafood, etc.
7、 Vitamin C
Vitamin C can prevent the retina from being damaged by ultraviolet rays, prevent the lens from aging, increase the toughness of small blood vessels in the eyes, repair cells, and help improve the health of the eyes. Vitamin C mainly comes from fresh fruits and vegetables. Generally, dark vegetables, oranges, grapefruits, kiwifruit, fresh dates, grapefruits, green peppers, strawberries and other contents are high. The preservation time and cooking methods of vegetables and fruits have different degrees of damage to vitamin C.
8、 Vitamin B2 (riboflavin)
Riboflavin is a coenzyme of many flavinases in the body, which is widely involved in the redox reaction in the body. If riboflavin is deficient, the conjunctival congestion, shame, blurred vision and other symptoms will occur. The main sources of riboflavin are eggs, lean meat, milk, beans and cereals.
Dr. Hua Haimei reminded that although food has the effect of protecting eyesight, children must remember that the maintenance of good eyesight is to pay attention to eye hygiene at ordinary times, so that food can really protect our eyesight.
cheap glasses prescription online，
cheap glasses online with prescription，
cheap glasses and eye exam，
contact prescription to glasses，
prescription glasses meaning，
Muukal |Affordable Eyeglasses online，
www.muukal.com