When you have myopia and have been diagnosed as true myopia, and the degree is above 100 degrees, you should wear appropriate myopia glasses to correct it. Once glasses are fitted, you should wear them except for washing your face and sleeping, because myopia patients are in a state of looking straight at their eyes after wearing appropriate glasses, and the natural relationship between adjustment and convergence is restored. Wearing glasses is not only for improving eyesight, but also for reading and working at a proper distance, so that there is a normal coordination between eye adjustment and convergence functions and eye fatigue can be avoided.
Wearing glasses correctly will not get deeper and deeper.
The development of myopia is not directly related to wearing glasses. Myopia patients wear appropriate glasses and pay attention to eye hygiene, and the degree of myopia will stabilize at a certain level. However, if you think that wearing glasses will be all right, but you don't pay attention to eye hygiene at ordinary times, and you are tired of using your eyes for a long time, it will lead to decreased vision and deepened myopia. In addition, wearing inappropriate glasses, such as no optometry or inaccurate optometry, will increase the burden on the eyes, reduce vision and deepen the degree. Some people with high myopia (above 600 degrees) insist on wearing glasses, but the degree will still deepen with the change of fundus, which is called pathological myopia in medicine. This deepening of myopia is related to the degree of myopia and family, and has nothing to do with wearing glasses.
Director Zhang Xiaojun and Director Liu Hong of the Department of Ophthalmology, the Second Affiliated Hospital of Nanjing Medical University. (He Songming)
The above is an article I specially found for you. I read very well. You should study it and go to the hospital if you feel it necessary. Because the hospital optometry needs mydriasis, the time is usually three hours, so I choose to have a holiday if I have this plan (when I go, I usually choose to leave early as soon as the hospital opens, but it will not work if it is late, and some places will be numbered), and I will have a holiday immediately, which will not affect my study.
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How to wear glasses correctly
(1) Patients with ametropia need glasses after experiencing light: the degree of optometry is often different from that of the last glasses. There are strong skills and experience in this, and doctors or optometrists need to comprehensively consider the patient's age, ametropia, vision, strabismus and the purpose of glasses, and finally prescribe glasses. Glasses are mainly used to improve vision, relieve symptoms, solve vision fatigue, diplopia and strabismus, and establish binocular monocular vision. So in principle, if you find refractive abnormality, you should wear glasses, including contact lenses.
(2) Don't wear glasses or temporarily don't wear glasses in the following situations: ① The degree is low and asymptomatic, and the myopia, hyperopia and astigmatism are generally within 50 degrees. ② Hyperopia in children or adolescents without any symptoms. ③ There are diseases in refractive system and photosensitive system, which affect vision, but there is hope for treatment. ④ Those who cannot wear ordinary glasses due to professional reasons (actors, athletes, pilots, etc.). ) and anisometropia can wear contact lenses (contact lenses).
(3) The effect after wearing glasses:
Generally, mild or moderate myopia can be corrected to normal vision, but high myopia or myopia above 1000 degrees can not be satisfactorily corrected because of fundus lesions and lens or vitreous opacity. The principle of myopia optician is to correct the vision to the highest standard, and the lower the myopia, the better, that is, the lowest degree to correct the best vision is the optician's standard. High myopia is often not completely corrected. If necessary, we can reduce 1/2 according to the degree obtained in the exam to make it suitable for reading and writing. All myopic astigmatism parts should be equipped with glasses. If the astigmatism exceeds 300 degrees, it should be reduced appropriately without affecting the corrected vision.
Mild and moderate hyperopia can also be corrected to normal vision, but hyperopia with high hyperopia or amblyopia is often dissatisfied with the corrected vision. According to the results of mydriasis optometry and reexamination, hyperopia has been completely corrected. Especially when children's hyperopia appears esotropia, if the glasses are not enough, the affected eyes need to use adjustment force to enhance the cohesion, and esotropia is difficult to correct. If accompanied by esotropia or exotropia, the degree can be appropriately reduced to reduce the degree of strabismus, but the corrected vision should not be less than 0.7. The principle of hyperopia glasses is to match glasses according to the highest degree of correcting the best vision; For people with astigmatism, all correction is also to get the best vision.
After getting an accurate prescription, it is also important to choose the glasses frame that suits you correctly and scientifically. First of all, we should fully meet the optical requirements of the lens, and fully consider the pupil distance, installation distance and inclination. From the point of view of ophthalmology, the optical center of the lens must be consistent with the pupil center, otherwise the lens will produce prism effect and interfere with the visual function, and dizziness, dizziness, distortion of vision, sore eyes and fatigue will occur after wearing the lens. Secondly, according to your face, choose the frame that suits your style and color. Some people pay little attention to wearing glasses. They just buy a pair at a store or a vendor, or wear other people's glasses indiscriminately. This is very inappropriate, and the result can only be increased eye fatigue and poor vision.
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How do teenagers wear glasses reasonably?
If teenagers don't wear glasses correctly, it will not only damage their eyesight, but also cause various diseases, such as dizziness, headache and gastrointestinal discomfort. An ophthalmologist at Harbin Red Cross Youth Vision Rehabilitation Base said that only by wearing appropriate glasses can teenagers really protect and improve their vision.
According to reports, preschool children suffer from myopia, the diopter is above moderate, and some cases may be accompanied by different degrees of exotropia. After this kind of myopia is equipped with glasses, it is necessary to wear glasses frequently and review it once every six months. Teenagers with mild myopia can watch it.
Wear a mirror when you are far away, and take it off when you are near; Moderate and high myopia, whether hyperopia or myopia, must wear glasses for a long time. Many parents think that "the degree of glasses will get deeper and deeper". In fact, the deepening of myopia mainly depends on eye hygiene and has nothing to do with wearing glasses. Without glasses, the degree of myopia will deepen even faster. Astigmatism patients, whether simple or mixed, must always wear glasses as long as they have conscious symptoms.
The project "Healthy and Bright Vision for Teenagers" jointly launched by our newspaper and Harbin Branch of Beijing Tongren Optometry and Glasses Center, namely Harbin Red Cross Youth Vision Rehabilitation Base, will provide free vision examination, mydriasis optometry, treatment and glasses knowledge consultation for teenagers by ophthalmologists. The address is No.332, Gogol Street, nangang district, Harbin (the second floor of Beijing Tongren Optometry), and the health consultation hotline is 53002997. (Al-Hayat)
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How to wear glasses for high myopia?
Q: Will people with high myopia (above 600 degrees) have adverse side effects if they wear contact lenses for a long time or often exchange them with myopia glasses? Will it lead to a deeper degree? Some people wear contact lenses with the same degree, and they can see more clearly than people with myopia. Why?
Nanning Xiao Fei
A: Patients with high myopia wear contact lenses and frame glasses alternately, which will not bring adverse side effects to their eyes. But wearing contact lenses for a long time may cause some eye discomfort due to lack of oxygen. 80% oxygen in cornea comes from direct contact and absorption with air. After wearing contact lenses, redness and dryness caused by corneal hypoxia are more common, some people will feel foreign body sensation, and a few people will cause corneal inflammation due to improper lens care or poor personal hygiene habits. The oxygen permeability of contact lenses on the market needs to meet the national safety standards, so it is safe to wear and clean contact lenses in strict accordance with the requirements of nursing procedures.
Wearing appropriate glasses (contact lenses or frame glasses) will not cause myopia to deepen. If you wear inappropriate glasses, it will bring different degrees of damage to your eyes.
It can be said that optometry is actually a medical behavior to treat myopia, hyperopia, amblyopia and presbyopia. Before optometry, doctors should carry out necessary eye examinations to rule out eye diseases. The complete optometry process includes three stages: 1. In the initial stage, the basic situation of eye refraction is obtained through optometry or computer optometry, and the original lens power is measured to understand the previous wearing situation of the lens wearer. 2. In the precise stage, subjective optometry, the subjective feeling of the wearer is finely adjusted by accurately measuring the astigmatism axis and degree, fog vision, red and green test, binocular balance and other steps. All these processes require comprehensive glasses information. Finally, doctors need to make the most suitable prescription of glasses according to their own experience and scientific judgment, try them on, and make the final fine-tuning according to the wearer's reaction. With the right prescription, you need accurate frame assembly to get the most suitable glasses.
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 their growth, and the demand for calcium in their bodies 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.
Massage more to improve eyesight, massage more: Jingming point, Sizhu point, temple, Yuyao point, Sibai point, Chengqi pocket and other points around the eyes.
As long as you insist on doing eye exercises and supplementing nutrition every day, your eyesight will slowly recover.
This method may be one of the most effective methods, so give it a try! !
Four exercise methods to protect eyesight
First, the blink method.
Choose a quiet place, or sit or stand, relax, clear your mind, open your eyes, keep your head and neck still, and turn your eyes alone. First, stare directly below, slowly turn left, then turn directly above, turn right, and finally return to directly below. Turn clockwise nine times like this. Then turn your eyes from down to right, up, left and down again, and turn them counterclockwise for another 6 times. Do it four times in all. Every turn, the eyeball should reach the limit as much as possible. This blinking method can exercise eye muscles, improve nutrition and make eyes flexible and bright.
Second, the eye breathing concentration method
Choose a place with fresh air, or sit or stand, relax, look straight ahead, slowly inhale the air, then open your eyes wide, pause for a moment, then exhale the air slowly, then close your eyes slowly, and do it for 9 times in a row.
Third, the eye ironing method
This method is best to sit, relax, close your eyes, and then quickly rub your palm to make it warm. Cover your eyes with your hands when it is hot. After the heat dissipates, suddenly take your hand away and open your eyes hard at the same time. This can promote the blood circulation and metabolism of your eyes 3 ~ 5 times.
Fourth, eye washing method
Disinfect the washbasin first, then pour in warm water, adjust the water temperature, put your face in the water, open your eyes in the water, move your eyes up and down, left and right for 9 times, and then rotate them clockwise and counterclockwise for 9 times. At first, water will enter the eyes, making them feel uncomfortable, but with the rotation of the eyeball, the eyes will gradually feel comfortable. When doing this action, if you feel difficult to breathe, you might as well lift your face from the washbasin and take a deep breath outside. This method can wash away harmful substances and dust in the eyes, and is also effective for mild cataract, and can improve the degree of ametropia of astigmatism, hyperopia and myopia.
Lycium barbarum-tonifying kidney and improving eyesight
Lycium barbarum is a kind of medicine with strong medicinal properties. The ancients once thought that it could make people live forever. Traditional Chinese medicine believes that it can enhance liver and kidney function and increase body fluid. Suitable for fatigue, lumbago, knee pain, dizziness, headache and other symptoms.
The recommended method for winter tonic is porridge: 20 grams of medlar, 60 grams of rice, one egg and one onion. Grind Lycium barbarum into powder, pour 3 cups of water into a frying pan, and fry until the water is halved. Soak rice in cold water for 30 minutes, pour it into the pot, start to cook porridge with medlar, add eggs and chopped green onion while turning off the fire, and stir to serve. This product can nourish yin and kidney, nourish liver and improve eyesight, and has good weight loss effect.
Insist on letting children practice rolling their eyes 20 times a day.
Although coriander is the "supporting role" of many vegetables, experts can't ignore its health care and medicinal value. The substances contained in coriander can clear away heat and relieve exterior syndrome, prevent urticaria and relieve itching. Some research data prove that coriander contains many vitamins, and its fire-clearing function has obvious effect on improving vision and reducing eye diseases. Therefore, it is suggested that people often eat coriander to help clear away heat and relieve exterior syndrome and improve their eyesight.
References:
center.sina.com/bbs/text/20/2005/03 13/229.html
Eat more foods rich in vitamins and foods that protect your eyesight. Vitamins mainly regulate people's visual nerve, which can alleviate and repair the damage of visual nerve and improve vision. According to statistics, 70% of the vitamins we consume every day come from vegetables. Vegetables with high vitamin content include leeks, spinach, green peppers, Flammulina velutipes, tomatoes, cucumbers and fruits. Other foods healthy for eyes include liver, milk, goat's milk, cream, millet, walnuts, carrots, spinach, Chinese cabbage, tomatoes, day lilies, water spinach, medlar and various fresh fruits.