Netizen Peter's mother: insisting that children practice rolling their eyes 20 times a day can improve myopia. His child's vision used to be 0.8, but now it has returned to 1.2 after several months. It is also said that this kind of exercise can prevent myopia and is more effective than eye exercises. You might as well let the children try. Yesterday, I went to the specialist clinic of Capital Institute of Pediatrics to see an ophthalmologist (Peter has chalazion in his eyes). Many children go to check their eyesight and prepare glasses. Alas, seeing my parents' anxious eyes, I am really worried that this is my son's future. Therefore, under the current pressure of study, firstly, children should participate in sports and outdoor activities, increase the chances of overlooking and rolling their eyes, and reduce the use of screens and eyes at close range. Obviously, there are more children wearing glasses nowadays than in our time. Is this also the progress of the times?
Netizen Dan Qing 0604: I recently bought a preventive alarm for my son and hung it on my ear. When the head is close to the desk, it will make a sound. I think it's quite scientific. I bought a shelf for correcting sitting posture before, but it affected the effect of writing, and my son was uncomfortable with it.
For people who often watch computers-prevention and treatment of dry eye.
Our eyes, especially the cornea, often rely on lacrimal glands for water supply. By blinking, tears become a layer of "tears" and spread to the cornea to keep the eyes comfortable. The so-called "dry eye" refers to a symptom of leaving tiny scars on the eyes due to the decrease of tears or the decline of lacrimal gland function. In the past, dry eye, cataract, glaucoma and other diseases were mainly common eye diseases of the elderly, but now it is found that more and more young people and white-collar workers often contact computers, televisions and game machines in some cities. According to the investigation of relevant departments, 90% of people who work in front of the computer for more than 3 hours every day have eye problems. This so-called "computer vision syndrome" is a manifestation of dry eye.
1. Clinical symptoms of dry eye
The common symptoms of dry eye are dry eyes, burning pain and more gums; Acid eyes, itchy eyes, fear of light, decreased vision. Other symptoms include headache, irritability, fatigue and difficulty in concentration. In severe cases, corneal softening and perforation will occur, and conjunctival congestion can be seen during examination.
2. Causes of dry eye syndrome
There is a layer of tears between the upper and lower eyelids, which contains substances to protect the eyes from infection. When people blink, tears are evenly distributed on the eyeball, cleaning the dust on the conjunctiva and keeping the eyes bright. The average person's tear secretion will decrease with age, so the incidence of dry eye in the elderly is higher. There are many factors that cause dry eye, including: the decrease of tear secretion after middle-aged and elderly people, and the symptoms of the eyes themselves, such as corneal degeneration, blepharitis and trachoma. Various immune diseases and connective tissue diseases, such as rheumatoid arthritis, lupus erythematosus, xerostomia, arthritis syndrome (more common in middle-aged and elderly women); It is caused by certain drugs, such as birth control pills, sleeping pills, sedatives, cough medicines, stomach medicines, etc. ; It may also be caused by vitamin A deficiency.
In recent years, the trend of dry eye is obvious, mainly because in modern life, young people have more and more contact with TV and computers for work and entertainment, and they face the fluorescent screen for a long time, lacking in blinking or letting their eyes rest in time, which affects the secretion of tears in their eyes; Or long-term use of some eye drops, such as vasoconstrictor eye drops, is also easy to form dry eye.
3. How to prevent dry eye?
(1) The best way to effectively prevent dry eye is to develop the habit of blinking more. Professionals believe that dry eye is a stress-type disease, and the problem lies in the eyes staring at one direction for a long time. Therefore, the best way to avoid eye fatigue is to rest properly and avoid continuous work. If you are an optician, it is very important to match a pair of suitable glasses. People over 40, it is best to use bifocal lenses, or wear glasses with low degree when typing. Working posture and distance are also important. Try to keep a distance of 60cm, adjust the most suitable posture, and keep the line of sight down about 30o. Such an angle can relax muscles and minimize the area of the eyeball surface exposed to the air.
(2) Long-term computer operators should eat more fresh vegetables and fruits, and increase the intake of vitamins A, B 1, C and E. In order to prevent dry cornea, dry eyes, decreased vision and even night blindness, computer operators should eat more foods rich in vitamin A, such as bean products, fish, milk, walnuts, vegetables, Chinese cabbage, water spinach, etc. Vitamin c can effectively inhibit cell oxidation. The main functions of vitamin E are: lowering cholesterol, removing garbage in the body and preventing cataracts. Walnuts and peanuts are rich in vitamin E, and vitamin B 1 can nourish nerves. Green leafy vegetables contain a lot of vitamin B 1. Drink green tea properly every day, because lipopolysaccharide in tea can improve the hematopoietic function of the body, and tea also has the function of preventing radiation damage.
(3) In order to avoid the fluorescent screen from reflecting or being unclear, the computer should not be placed on the opposite or back of the window, and the ambient lighting should be soft. If there are windows behind the operator, curtains should be drawn to avoid eye fatigue caused by bright images reflected by direct light on the screen. Usually, the average person blinks less than 5 times per minute, which will make his eyes dry. When a person works in front of a computer, he blinks only one-third of the usual frequency, thus reducing the secretion of lubricants and enzymes in his eyes. You should blink more and rest at least once an hour.
(4) In order to reduce the dryness of eyes, corneal nutrient solution can be properly used at eye points. Such as: Befu Shu eye drops, Xiao Laiwei eye drops and some artificial tears. In addition, eye exercises can also relax eye adjustment and reduce visual fatigue. The essence of eye exercises is self-massage, that is, by self-massaging the acupoints and skin muscles around the eyes, the blood circulation in the eye socket is increased, the nerve nutrition is improved, and the hyperemia of the brain and eyeball is eliminated. Because of the smooth circulation, the intraocular accommodation muscle can eliminate the accumulated metabolites, thus achieving the purpose of eliminating eye fatigue.
So it needs to be reminded that when you concentrate on the computer screen, the number of blinks will decrease. I suggest you blink more to ensure that the "tear film" can disperse water to the cornea to prevent dry eyes. If you suspect that you have dry eye, you should see a doctor as soon as possible.
China Com in June 2003
How do people who need to improve their eyesight and overuse their eyes choose health food?
Eyes are visual organs, stimulated by light, which make the body perceive the images, colors and movements of objective objects. The main part of the eye is the eyeball. The reason why the eyes can see objects is that the transparent matrix of cornea, aqueous humor, lens and vitreous body of the eyeball distorts and turns the external light to the retina. The retina can feel the stimulation of light because it contains two kinds of photosensitive cells, namely cone cells and rod cells. Under the action of light, a series of chemical changes have taken place in photoreceptor cells. Through these chemical changes, light energy can be converted into electrical energy, causing nerve impulses and transmitting them to the visual center to produce vision.
In medicine, the ability of the eye to finely distinguish the shape of an object, that is, the ability to distinguish the minimum distance between two points, is called vision. There are many reasons for poor eyesight. They are: ① various types of ametropia, including hyperopia, myopia and astigmatism; ② lens opacity, that is, cataract; ③ corneal opacity; ④ vitreous opacity and hemorrhage; ⑤ optic nerve diseases, such as optic nerve atrophy. Optic neuritis, retrobulbar optic neuritis, chronic glaucoma and toxic amblyopia; ⑥ Circulatory blindness, occasionally seen in severe uremia and retinal arteriosclerosis, is mostly temporary; ⑦ Vein or retinal tumor and retinal detachment; 8 acute glaucoma; Pet-name ruby acute iriditis; Attending intraocular bleeding, etc. Among them, myopia is the most common, which is caused by many reasons, such as poor learning environment, incorrect reading and writing posture, too long reading time, weakness, anemia, endocrine disorders, excessive fatigue and so on. Health food for improving visual function can adjust and improve the physiological mechanism of myopia through the above links.
1. A food with eyesight improving effect
To protect eyesight and prevent eye diseases, we need to start from many aspects, among which paying attention to nutrition is also helpful to improve eyesight. In the daily diet, foods that can improve eyesight are:
(1) Foods rich in vitamin A are closely related to normal vision. If vitamin A is insufficient, the regeneration of rhodopsin is slow and incomplete, and the dark adaptation time is prolonged, which can cause night blindness in severe cases. If vitamin A in the diet continues to be deficient or insufficient, dry eye will appear, and the condition will further develop into corneal softening and corneal ulcer, as well as corneal folds and Pitt spots. The best food sources of vitamin A are various animal livers, cod liver oil, fish eggs and poultry eggs. Vitamin A contained in carrots, spinach, amaranth, alfalfa, red sweet potatoes, pumpkins, green peppers and other vegetables can be converted into vitamin A in the body.
(2) Foods rich in vitamin C can reduce the damage of light and oxygen to the lens of eyes, thus delaying the occurrence of cataracts. Foods containing vitamin C include persimmon pepper, tomato, lemon, kiwi fruit, hawthorn and other fresh vegetables and fruits. (3) Calcium, calcium is related to eyeball composition, and calcium deficiency can lead to myopia. Teenagers are at the peak of growth, and the demand for calcium in the body is relatively increasing. If you don't pay attention to calcium supplementation, it will not only affect bone development, but also reduce the elasticity of the developing eyeball wall-sclera, increase the internal pressure of the lens, lead to the elongation of the anterior and posterior diameter of the eyeball, and lead to myopia. Foods containing more calcium mainly include milk and its products, shellfish (shrimp), bone meal, beans and bean products, egg yolk, dark green vegetables and so on.
(4) chromium, chromium deficiency is easy to cause myopia, chromium can activate insulin, so that islets can play the greatest biological effect. For example, the lack of chromium in human body will hinder the function of insulin in regulating blood sugar, increase the osmotic pressure of plasma, lead to the increase of osmotic pressure and diopter of eyeball lens and aqueous humor, and thus induce myopia. Chromium is mostly found in brown rice and wheat bran, and it is also abundant in animal liver, grape juice and nuts.
(5) Zinc, zinc deficiency will lead to visual impairment, and zinc is mainly distributed in bones and blood in the body. Corneal epidermis, iris, retina and lens also contain zinc. Zinc participates in the replacement and transportation of vitamin A in the eyes, maintains the normal tissue state of retinal pigment epithelium and maintains normal visual function. Foods containing more zinc include oysters, meat, liver, eggs, peanuts, wheat, beans and miscellaneous grains.
(6) Pearl, which contains more than 95% calcium carbonate and a small amount of minerals such as magnesium oxide and aluminum oxide, and contains a variety of amino acids, such as leucine, methionine, alanine, glycine, glutamic acid and aspartic acid. Pearl is sweet, salty and cold. The "Zhu Zhen Powder" made of pearl powder, borneol and amber can inhibit the formation of cataract.
(7) kelp. Kelp contains 1/3 mannitol in addition to iodine. There is a thick layer of "frost" on the surface of dried kelp, which is mannitol in kelp. Mannitol has diuretic effect, which can reduce intraocular pressure and has a good effect on the treatment of acute glaucoma. Other seaweeds such as Undaria pinnatifida also contain mannitol, which can also be used as an auxiliary food to treat acute glaucoma.
2. Health foods that help improve eyesight can increase nutrition and improve eyesight through diet, so eat more of the above foods. If we can choose appropriate health food that can improve our eyesight on the basis of daily diet, it can play a very good role in adjuvant therapy. Optional healthy foods are:
(1) Foods rich in vitamin A, such as medlar products.
(2) It is rich in protein, polypeptide and some amino acids, such as taurine and nucleic acid.
(3) Health tea, granule or capsule containing cassia seed, chrysanthemum, hawthorn and pearl powder. People who can read are afraid of what they can't do. "This famous saying means that people who read books can do anything. Then, if that person reads a bad book and enjoys it, he may do bad things.
The Bishgachu in Nikolai Nikolai Gogol's Ghosts reads everything. He is not a man who reads widely, but a fool who lacks taste. Zhu Zeman in Zhuangzi Lieyu Crown learned a stunt of killing dragons. In fact, there is no place to kill dragons. Only then did he realize that there was no dragon in the world, and all his skills were in vain. In this way, it is always half the effort to open books indiscriminately, and it is not worth the loss!
Writer Zhao Shuli said: "Reading is like mining.
Eating pears is harmful to the heart and spleen; Eating red dates is harmful to teeth; Taking this medicine is good for your health, but it also has side effects.
British writer Fielding said, "Bad books are like bad friends, which may kill you." If one-sided understanding of "open book is beneficial" means reading all the books, without choosing or asking the content, reading will be beneficial, but it is actually wrong! Be sure to learn a skill and choose the most valuable, insightful and good books that are suitable for you to read.
Therefore, I hope everyone will remember that opening books may not be beneficial, because no one is perfect. No book is completely correct.
Responder: Little Coke Girl-Trainee Magician Level 2 3- 13 19:52
-
People often say: "It is beneficial to open books and read books." However, on closer examination, this statement is not entirely correct. If we are interested in every book, it may not be good to open it.
Nowadays, students may all like to read martial arts and romance novels, books and periodicals, and sometimes forget to eat or sleep. Once they get lost in reading, they will be possessed. Then they concentrate on books in class and have no intention to study, and their grades will plummet. Others are attracted by some plots in the book, imitate the characters in the book, and sometimes take the road of crime. Isn't reading killing yourself? This is only the first layer of "opening books is beneficial": opening books is beneficial. And the second floor.
The second is that we should have a choice when studying. Don't read unhealthy books that don't help us much. When reading, you should read some books that are beneficial to your physical and mental health and helpful to your study and life. Such a book is a good book. Only by reading well will you not ruin yourself. Some people compare books to friends. If you value books, you will make good friends and make progress. If you don't read good books, of course, you will make friends with people who don't make good friends, and then you will regress. Because near Zhu Zhechi, near Mexico is black! Therefore, only reading will be beneficial to you. Therefore, in my opinion, opening books may not be beneficial. I sincerely hope that every student can read books selectively. Don't lead yourself astray and ruin your life just because you read a wrong book.
Opening books is not necessarily beneficial. It is true that reading can make people increase their knowledge, cultivate their temperament and cultivate their body and mind, but "opening books" is only a necessary condition, not a sufficient condition.
Liu Xiang of the Han Dynasty once said: "Books are still medicine, and good reading can cure fools." Since books are medicine, they have two functions: first, good medicine will cure diseases; One is poison, which can kill people. Isn't it? In Germany in the 1920s, many people were regarded as Hitler's martyrs because of their bad influence on Mein Kampf. Bad books, like bad friends, may kill you. It's true. Now some students are addicted to martial arts or romance novels, reading those grotesque books all day, and "throwing" their homework aside, which leads to a decline in their academic performance, and finally draw water with a sieve. Just think, can a book like "Open" be said to be "beneficial"? "A good book is better than a treasure, and a bad book is worse than a robber." Therefore, whether it is beneficial to open a book depends on what volume to open first.
A philosopher once said that people who can get the necessary nutrition are healthier than those who eat more. At the same time, real scholars are often not people who read, but people who can read. Some people don't think seriously about reading, but just skim it. Some people read books that are not suitable for them, and some people even read books with a curious attitude. How can such an "open book" be useful?
As an emphasis on the importance of reading, the idiom "opening books is beneficial" naturally has its positive significance, but it is inappropriate to judge that "opening books is beneficial".
Respondent: Dongfeng-Tongsheng Level 1 3- 14 20:28
-
I don't want to go to school if I get lost in martial arts or romance novels ~ ~ ~
References:
Don't read martial arts or romance novels.
Interviewee: Anonymous 3- 15 10:02
-
Beginning: Books are the nourishment of human beings and the source of human knowledge. Just as a civilized country has lost its book culture, a once prosperous country will also face the threat of extinction. Therefore, it is beneficial to open the book. /Liu Xiang once said in the Han Dynasty: "Books are still medicine, and good reading can cure fools." (midway note: this is the creation of "chasing snails by rockets". Please don't get the correct answer when others post it. Thank you for your cooperation. Since books are medicine, they can cure diseases. In fact, you don't have to read carefully when you study. Just browsing, many a mickle makes a mickle. Over time, there will naturally be a treasure house of knowledge in your mind. Think about it. Isn't this the advantage of opening books? Good people read bad books or good people. Bad guys study or bad guys. Do the so-called bad books have some advantages of their own? As far as the benefits of reading are concerned, it is big enough to make people fully realize, repent, move towards the bright road and succeed; Small enough to learn several ways of writing, a few words, and even know a few words. These are the benefits of reading, which is undeniable. So we can introduce several points to demonstrate that bad books also have some advantages. As long as it is called a bad book, it will definitely affect people's character and lead people astray. But please think about it, what will happen if those bad books can't resonate with readers and make people go deep into them? If the structural layout, expression, conception and language of this book are unremarkable, even worse than the general "running account" composition, how can it resonate with readers? Therefore, no matter how bad the book is, at least you can learn some writing methods in the so-called bad book, and at worst you can know a few words. Can you say it's useless? In ancient China, Lao Tzu had a view that everything has its two sides. Since bad books are harmful, they must have their advantages. Whether it is a bad book or a good book is judged according to whether the advantages outweigh the disadvantages or the disadvantages outweigh the advantages. In other words, bad books also have certain benefits. Although you can cite a bunch of examples of reading depravity, madness and crime, what can this show? It can only show that the reader's own mentality is not correct. That's a matter of mentality, and you can't blame the book. Can anyone blame a knife for killing people with a knife? Einstein wrote a formula: w = x+y+z, w stands for success, x stands for effort, y stands for correct method, and z stands for modesty. If the method is correct, it is equal to one third of success. As long as you read a good book, modesty and hard work are beneficial.