The dangers of myopia and characteristics

Myopia harm

1. Poor eyesight, eyes often dry and fatigue, impact study, life and work quality, long-term wear glasses, can lead to life work inconvenience.
2. Of high myopia, will lead to eyeball outstanding. The is flabby, influence appearance.
3. Entrance, join the army, takes an examination of civil servants and limited to find work.
4. More old pages and should be watched because of presbyopia after two pairs of glasses.
5. Nearsighted patient its cataracts, glaucoma was significantly higher than normal.
6. Genetic next generation, myopia genetics is very big, especially in extreme myopia. Genetic are greater than 80% chance.
7. The main farm is: High myopia, especially high myopia and prone to vitreous opacity, retinal hemorrhage and and blindness. According to the statistics in the eyes of the blind due to myopia, already second only to cataracts, glaucoma in third place, to myopia should also must be positive prevention and treatment, prevent the unrestricted development.

Myopic characteristics

Myopia in developing countries is especially terrific, Asian countries myopia rate 70% to 90%, the United States and Europe myopia rate at 30% to 40%. The world is almost all of the people have myopia.
Myopia, Asians than Europeans are more common, the women everyday (twice as many women as men), blacks are more rare. Myopia is not considerable study of the cause, a lot of myopia is caused by a parasite, in their eye can see clouds, wire, transparent insect body, cannot correct.
Myopia sex aging, myopia and farsightedness can coexist in one of the eye. Myopia is not slow from, but the sudden emergence of, yesterday your eyes may or the normal eyesight, today might suddenly make you began the deliberate myopia career.
1. The stars everywhere and always see the whole eyes filled with flash, but this kind of situation is mostly pseudo myopia is the, 400 degrees above no, once appear must cure, prevent myopia.
2. A distant view is not empty, is the most basic symptoms myopia. 4.9, 5.0, 5.1, 5.2, 5.3, 5.4 for normal sight, is good eyes. All of the lower than 4.8 are near-sighted.
3. Myopia and pseudo myopia distinction, myopia impossible excessively with eyes in pain while, pseudoaneurysms, myopia and.
4. Near-sighted eye is the protruding. This is the most scary.
5. Near-sighted eye has not, like something in it.
6. Myopia is not like pseudo myopic eyes, more than any other is the black rim of the eye black.

Age of onset of myopia

Myopia is sometimes classified by the age at onset:
1.Congenital myopia, also known as infantile myopia, is present at birth and persists through infancy.
2.Youth onset myopia occurs in the early childhood or teenage, and ocular power can keep varying till the age of 21, before which any form of corrective surgery is usually not recommended by ophthalmic specialists around the world.
3.School myopia appears during childhood, particularly the school-age years. This form of myopia is attributed to the use of the eyes for close work during the school years.
4.Adult onset myopia
Premature adult onset myopia occurs between ages 20 and 40.
Late adult onset myopia occurs after age 40.

Myopic reason

Definition myopia - Myopic reason

Myopia is many factors lead. In recent years considerable evidence that environmental and genetic factors involved in the myopic happening: External cause-long time close to see things, make the eye of lost flexibility in subjects lens lens can't recover (than natural thick), then produce myopia.
Myopic hereditary factors: the study considered highly shortsighted parents family. The next generation of myopia higher incidence and have a certain innate tendency of myopia has already been high myopia is even more so. But for general myopia hereditary tendency is not very obvious.

Genetic relationship between

Myopia mainly has 40% is genetic, myopia is high myopia of genetic main genetic, high myopia also sent two kinds of a is physiology sex. One is the pathology sex, if pathology sex myopia, the baby's eyes of myopia has formed possibility, because with the specific familial transmissibility, have the probability, who have high myopia is not the parents of the eyes of his children with high myopia, are not like that, but there is a probability in it, I want to emphasize is, must be pathological high myopia, if is physiology sex myopia 600 degrees, 1000 degrees is not uniform genetic, that is not necessary will be innate. Pathology sex myopia with heritable factors, physiology sex myopia is not a chromosomal factors.

From high myopia genetic principle and chance

Height nearly as autosomal recessive hereditary disease, also is a pair of myopia is the disease genes of virulence genes to come on. If only one of the genes, is the cause, and the other a gene is normal, do not come arranged, just virulence genes carriers. For example, the parents are not myopia, but they are all extreme myopia gene carriers, I don't show myopia in them, but both of them of virulence genes genetic give children, make the child have two myopia gene, so therefore children become near-sighted.
Extreme myopia is the man with extreme myopia (600 degrees or more) with the women, the children, the onset of the opportunity to more than 90%. If myopia is the person that gene combination, children may have half is high myopia, with normal vision and in combination or low-alcohol myopia, children myopia is 1/10 chance of happened.
If are acquired the physiological high myopia, the child's eye health influence is not big, want to make your baby can achieve the development of healthy eyes, must pay attention to the child after child was born in the usual eye health, for example, don't too long time silent distance let children to observe things, including close video, or do some delicate work, such as described and practicing the word, and so on, which can make the child's myopia the likelihood of lower.
Myopic ecological factors: shortsighted occurrence and development of close to the eye with a tight relationship. Teenagers eye is in a growth stage, adjust ability is unusually strong. Khi eye of stretching is larger, reading. Writing and close work, not merely need for the adjustment of the eye function, double eye and cohesion, so the eye to eye muscle put some pressure, as time passes, eyeball rear axle could change before long. Each growth reached 1 mm 3.00 d (likewise is common 300 degrees of said), and of course the myopia most for pure sex myopia, general degree are low, are in the following six d, come arranged in more before and after puberty, progress is slow, someone put this myopia called true myopia, in order to show and pseudo myopia phase difference.

1. With eyes to close the distance. According to relevant information report, teenagers to long-term use eye myopia equal to the reason for the numerous seed. Teenagers of the eyes DiaoJieLi is exceptionally resilient, when books and the distance of the eyes of seven to 10 centimeters when still can see objects, but if often to distant reading, writing will make the adjustment of the eye abnormal tension, which can form inflectional sex (regulatory) myopia, called pseudo myopia. If long-term over adjust, make the subjects can't flexible adjustable, due to excessive regulation and cause FuCou effect is strengthening, make the eye to eye muscle pressure, intraocular pressure, the eye tissues in congestion, plus youth organization and delicate eye, eye QiuBi compression gradually outspread, eyeball rear axle before a longer, more than normal in the formation of the axial nearsightedness, so-called true myopia. Normal reading distance should be 30-35 centimeter.

2. Use eye for too long. Some teenagers reading and writing homework, watch TV, etc for three to four hours without rest, even late into the night went to bed rest, so not merely affect the body healthful, and make the eye burden, eye muscles long time inside and outside is in nervous condition and cannot get rest, as time passes, when to see from a distance, the eyes cannot relax muscles in spasticity, so look afar feel fuzzy and the formation of myopia. Some students had a summer vacation is decreased obviously vision is the cause. Vague claims for reading and writing or watching TV 40-50 minutes should rest a moment to look far away or for a while.

3. Lighting light strong or weak. If the light is too strong, such as sunshine illuminate written etc, can cause muscular reflex, stimulate an eye, make the eye is unwell, harder to see font, on the contrary, the light is too weakly, written lighting is insufficient, the eye cannot see clearly font, head will forward, squat over the books, above two kinds of circumstances are eyes fatigue, eye over adjust or spasm and the formation of myopia (using the lamp that shield an eye can prevent this scenario).

4. At the car or walking reading. Some teenagers make full use of our time, the side walk the road in reading a book or walk reading in the car, so that are bad for your eyes. Because cars in vibration, the body in a sack, eyes and books distance never fixed, plus excellent lighting conditions, increasing the burden of the eyes, often such, could cause a myopia.

5. Lay is reading. Many teenagers like lying in bed reading a book, this is a wicked habit. Because people eyes should keep reading level condition, make the adjustment and set (FuCou) agree, reducing the fatigue of the eyes. If lie reading, two eyes not state level, eye and books of distance not consistent, two eye view the up and down or so are not consistent, the books the intensity of illumination don't smooth, can make the adjustment of the eye strain and easy to move the books practically eyes, so can aggravate burden eyes two to three times, day long form myopia.

6. Lack of sleep. When the lack of sleep, the second day in miserable spirits, giddy, brain no rest adequately, fails to eliminate fatigue, accentuate the eye burden, make myopic happening. Lack of sleep is the cause of formation of the myopia is an important one.

7. That does not comply with the desk. The writer position is not correct. If the desk and chair are too glum, so that TouQian poor, spine bent, and chest compression, eyes adjust relatively nervous. Or high tables and chairs, feet hang loose, lower limb easy swing, can't keep the correct posture, can make the eye fatigue happened, as time passes easily produce myopia.

8. Now, the impact of space radiation. Often watch TV, long time to use the computer. Video Games, incredibly easy to make eye flesh fatigue, can directly cause students to myopia. Today's computer computer is an indispensable course, prolonged operation of dry eye cause fatigue and easy cause myopia, all needs to utilize the proper control of time.

9. Corneal bending degree or lens bending degree before and after the change. this kind of situation more for congenital change, clinical less rare.

10. Malnutrition. Calcium. Zinc. Vitamin etc.

Myopia treatment

Current treatments for myopia many methods, main is to alleviate eye flesh of fatigue, improve eye flesh itself adjustment function, improve and improve their own bare eyesight, control development degree. Commonly used methods:

1, the treatment of myopia frame glasses

At present the most safe, cheap, effective method, of course, is wear glasses, classes needed to get to the hospital to the exclusion of other diseases, through the form it's got glasses degree, of the parameters of the pupil, then to the optician's to go with a mirror. Need to point out is, children and youth, because have the very strong adjustment ability, so need mydriatic, subjects to lull, remove DiaoJieLi again after it's.

At present the most anodyne, cheap, effective method, of course, is wear glasses, first need to an ophthalmic hospital the exclusion of other diseases, through the form it's got glasses degree, of the parameters of the pupil, thenceforth to the optician's to go with a mirror. Myopia wearing glasses method, a mirror can fulfil the effect of correction, otherwise the deeper degree wear. Need to point out is, children and youth, because have the exceptionally tough adjustment ability, so need mydriatic, subjects to lull, remove DiaoJieLi again after it's.
Common glasses prescription: 3.00 DS () -1.50 DCx180-> 1.0, meaning, is the myopia 300 degrees, 150 degrees of myopic astigmatism, scattered in the optical axis 180 degrees, a mirror vision after can correct to 1.0

2, the treatment of myopic lenses (corneal contact lens)

Contact lenses are a kind of wear in the eye on the cornea, for vision correction or eye protection glasses. It includes rigid and soft too, contact lenses from the outside and convenience are not frankly give myopia, farsightedness, astigmatism diopter patients were brought a lot of improvement, and a wide field of vision, inspect content lifelike, in addition in the control teen-agers myopia, astigmatism, development, treatment specialist eye disease, etc have also played a special effect.

3, the treatment of myopia drugs

Atropine, cefoperazone existing harm, Derby card "antiemetics such as M receptor antagonist

4, surgical treatment myopia:

In the role of the cornea {laser vision correction} surgery: PRK, LASIK, LASEK and so on.
Have the artificial crystal crystal eye implants

5, the treatment of myopia food:

(1) eat more green vegetables (especially spinach) and fresh fruit, and to increase the vitamin, trace elements and lutein;

(2) often eat dried fruits, such as raw melon seeds and nuts, and zinc supplementation can linoleum acid, the former is the glue of the retina (to prevent nets take off), which can be converted into DHA, is the composition of the substance of the retina nerve layer;

(3) eat more fish, especially deep sea fish, fisheye to the eyes is very good, mainly is added DHA and protein, at least once a week to eat;

(4) Egg yolks, rich in lecithin and lutein, the former is visual transmission neurotransmitter spore two diphosphate choline precursor of. The latter can prevent short-wave toxic to eyes light damage and free radicals.

(5) shrimp crab, filling calcium and zinc;

(6) cooking note light.

(7) Animal lover and carrots, can complement the Va, can increase the night vision.

Myopia prevention

Definition myopia - Myopia prevention

Myopia is a certain degree and use eye habits, therefore generally thought of as can prevent, at least, could slow deep speed.
To prevent myopia, must start from early childhood, the children will begin to let children period with the correct reading and use eye habit, make the development of the immense eyes don't by acute stimulation, should pay attention to place the sitting position including reading, light (the lamp that shield an eye), watching TV or using a computer in the distance, enough rest time is also very important. Even if adults will have to pay attention to these aspects, to slow down the speed of eyesight.

The method of preventing myopia:

1. The training they correct reading. Write posture, doesn't lean over the table or twist the body. Books and eyes should maintain a ShiChe, the body from the desk should keep a first (adult), the distance from the tip of an inch should hand. The school desks and chairs should be suitable for students in the figure.
2. Reading and writing time shoulds not be too long, for 1-1.5 hours to have a short rest eye to overlook, doing eye exercises. (no handheld devices and the use of the computer to read and write about, distance and so must also not use time)
3. Write reading appropriate light (using the lamp that shields an eye), the light had better come from the left illuminate. Don't too dark or too bright light reading. Write, and to reduce the burden, ensure the break 10 minutes rest, reduce visual fatigue.
4. Actively carry out physical exercise assure that students have an hour every day sports activity.
5. Teach the students to write, not dense minor offences, do not write more oblique. Kin. Write time don't too long.
6. Do eye exercises.
7. When watching TV to note height should view and is flat; Eye and the distance of fluorescent screen should be no less than the screen diagonal length of 5 times; When watching TV indoor should keep a lamp light a small electric light, help protect eyesight; In the last watch TV after 1 ~ 1.5 hours to have a quick rest eye to ignore, doing eye exercises.
8. Should eat more contain vitamin rich food symposium of vegetables and animal's liver. Egg yolk. Carrots contain vitamin B, are good for your eyes; Eat more animal's liver can treat night blindness.
Myopia patients generally lack chromium and zinc. Myopic patients should eat some more food containing zinc. Foods like soybeans. Almond. Laver. Kelp. Mutton. Yellow corvine. Milk powders. Tea. Meat. Beef. Such as liver containing zinc chrome and more, but right amount adds. Zinc supplementation'd better take protein zinc.
Frank to prevention and control of myopia, catch an immediate catch small. Positive correction and prevent the silent progress. If already produces myopia, going to the hospital is, wear appropriate glasses.
9. Play badminton. Table tennis can prevent myopia in play in the process should be swift eyes follow badminton and tennis table that sort of flexibility strong "small ball movement" track changes, the five to nine years old the child's eye the perfect function has unexpected benefits.

Definition myopia

Define myopia is to point the eye looks, not be an obvious thing, but she nearly things symptoms. In refractive static, under the premise of distant objects in the retina can converge, and the retina formed before the focus, therefore cause visual deformation, lead to objects from a distance blurry. Myopia, through narrow her eyes can restrict the light of the incident, thus reduce like poor, so that they can see it clearly. Myopia originally meant to narrow her eyes. Myopia can be through the wear concave lens (concave through glasses) to correct.
Myopia is also a kind of disease, a kind of eye disease. Parallel light rays pass through the eye refractive system inflectional. The falls on the retina of before a refractive status, so myopia can't see the distant goal. If the goal is to the eye moved in a light in a certain degree of missing so irritating eyes, forming the focus back, when the target is closer to a point on the eyes, from the point of the eye position more closely, the deeper the degree of myopia.

Define myopia classification

Myopic degree classification
(1) 3.00 D (300 degrees) be less than, called mild myopia.
(2) 3.00 D ~ 6.00 D (300 degrees and 600 degrees) persons for moderate myopia.
(3) 6.00 D (600 degrees) or more is high myopia, and allege illness as the reason for rational myopia.


Myopia refractive component classification
(1) axial nearsightedness, is because the eyeball caused by excessive development between the front axle.
(2) Curve for sexual myopia, is because the cornea or crystal curved surfaces have been caused by strong.
(3) refractive willfulness nearsightedness, is the refractive interstitial refractive rate caused by abnormal.|


Myopia regulatory classification
Pseudo myopia additionally called for regulatory nearsightedness, is by far not to relax when see adjustment caused by it and refractive composition change are the true myopia is fundamentally different.

Define myopia - Pseudo myopia

Pseudo myopia is relatively true myopia is concerned, the real myopia is to face up to the eye refractive system is a stationary state, that is, remove the adjustment function, the eye at the remote distance in limited within. In other words, myopia is due to congenital or acquired factors and cause eye anteroposterior length, parallel light into the eye in the retina after formed by focus, cause inspect content fuzzy, and pseudo nearsightedness, is in on distant objects with part of the supervisory role to participate in, common in young students see things in nearly, because as the extent of the regulation compelling and continuous time is too long, cause of persistent subjects contraction, cause adjust nervous or conditioning section convulsion, thus in the long time reading and writing to see far, can't soon relax regulation, and cause dizziness. Eyes bulge, declining eyesight vision fatigue symptoms. This because of the eye QuGuangLi enhancement, make the eye in myopia state, is called spurious myopia. Pseudo myopia and true myopia look at symptoms have vision fatigue, far JinShiLi good eyesight and features. Nonetheless, pseudo myopia belongs to functional change, no eye anteroposterior variable-length problem, just adjust spasms, the paralysis medicine point after subjects eyes, most of it can be converted into farsightedness or to face up to the eye, if according to true myopia wearing a myopic lens treatment, eyes will feel extremely uncomfortable, because it did not remove regulation convulsion, and even lead to the risk of developing myopia.

Define myopia - True myopia

True myopia: also called Shaft sex myopia. Its refractive mesenchymal inflectional force is normal. Eye axis diameter extension is before and after. Distance light after starting imaging in before the retina.
True myopia mainly for clinical characteristics:
(1) The myopic degree for more. High Myopia. Happen. Development time is long. And patients look unusual degree of eye the convex.
(2) The true myopia is hard to adjust itself to recover.
We think the true myopia and pseudo myopia biggest difference lies in the refractive interstitial (corneal. Waterproof. Lens. Vitreous) refractive normal. And a longer view axis. The main reason is that long-term close looks matter.

Define myopia - Mixed myopia

Often, a person's myopia is an eye fatigue causes of mistaken sex myopia. Lead to slowly part of the true myopia and pseudo myopia synchronization. You could say so. In myopic degree is deepening people inside. Is to belong to mixed myopia. Currently the most effective treatment of myopia physical method is nothing more than two kinds: it is a surgery, owed to current operational conditions are unknown sequela, so that we have no way of faults, the advantage is fleeting effect. Another is wearing glasses.