Astigmatism refers to the state in the absence of regulation, parallel light through the eye of the refractive system of inflection, because of the refractive power of the system two different refractive meridians, the focus can not be formed on the retina, called astigmatism.

Astigmatism is divided into regular astigmatism, irregular astigmatism and bifocal oblique astigmatism. Two different refractive power is perpendicular to the main meridian by rule astigmatism; refractive meridian curvature of the interface by irregular astigmatism Ray Ban Outlet sunglasses; two different refractive power by the main meridian intersect obliquely bus oblique astigmatism.

There are many reasons for the formation of astigmatism; astigmatism can be divided into curvature, deviation from the optical center of astigmatism, astigmatism and muscular index astigmatism. The astigmatism clinical manifestation mainly drops for the vision, regards the double image and eye strain and so on.

Population the incidence of astigmatism how much?

According to Ray Ban Wayfarer Polarized glasses survey, 68% of the population has astigmatism, of which about 50% of astigmatism in 0.75D (included) or more. Standards normally 0.75D as obvious astigmatism, astigmatism in degrees of clinical significance of 0.75D and need to correct it in order to achieve good visual correction.

Astigmatism contact lenses advantages?

Ordinary spherical soft contact lenses (SSCL) some degree of astigmatism can be corrected (the smallest tear corrective lens correction circle of confusion), its clinical correction effect depending on the patient's tolerance may be (first depends on the absolute need to correct astigmatism value, followed by the fact astigmatism is not really been corrected, but the patient can tolerate.

Tonic soft contact Ray Ban Wayfarer Glasses (TSCL) can truly achieve full correction of astigmatism, so that patients receive more satisfactory visual acuity.

Experts point out that, if it is to be equipped with long-term vision correction Ray Ban Outlet sunglasses, they should adopt medical optometry, so will greatly enhance the accuracy and can maximize avoid optometry are not allowed due to a variety of symptoms.

Now, almost every optical shop in big cities are equipped with a computer optometry equipment, optometry is also equipped with a master, but many people feel that the computer is better than the human brain to be precise, a single result based computer optometry glasses, this is not science. Glasses should be based on the results of medical optometry, computer medical optometry just one of the steps only, from the real medical optometry is far worse.

Human eye is like a camera, "on focus" to look at stuff. However, the camera is different, eyes feeling, adaptability, computer optometry only will your eyes as a "machine", when customers see through the lens to adjust the computer image after, it automatically prints out according to the adjusted results are Visual acuity and eye examination should wear lenses in degrees. The results do not take into account the refraction of the regulatory function of the eye itself and adaptability is a mechanical result.

However, the medical optometry including blades, Ker/Refract meter, balance, Visual function check shadow, eyes trained in five parts, computer optometry only accounts for one-fifth. Formal optometry should be inspected by eye doctors, excluding refractive error other than the disease, and then upon plate, computer optometry, shadow, balance, binocular vision, such as steps to glasses. Enjoy Ray Ban Wayfarer Glasses after doctors reviewed, if the review found that wearing glasses could not achieve the vision of 0.9, this is not a question of the glasses, myopically may exist, such patients need for Visual functional training, this is full of medicine, optometry.

Regardless of the machines used computer optometry error itself, because it is the result of an instant, mechanical, so the computer optometry result can only be used as a reference, by no means standard.

How to tell if a pair of glasses bad? Eligibility glasses is a good glasses it?

Judgment glasses quality standards is very simple: it is to see Cheap Ray Ban Sunglasses wearing comfortable or not. Qualified is not necessarily a good spectacle glasses, just as one qualified to wear the same clothes are not suitable for everyone. Comfortable wearing a pair of glasses to consider many factors, lens quality, frame shape, the position of nose pads so related to this, these are not the computer can do, and need to adjust the experience and carefully seasoned staff service in order to do so.

Teenagers how wear glasses?

If the teen-allotment Ray Ban Outlet sunglasses inappropriate the words of, not only will damage eyesight, moreover may also cause a variety of illnesses, such as dizziness dizzy, headache, gastrointestinal discomfort and other illnesses. Eye experts say, give teenagers tie suitable of the glasses after the, only the rational ground Dais, can really play the protecting and improve visual acuity role.

According to introduction, preschool children suffering from myopia, check the diaper in the more than moderate, part of the cases may Human accompanied by varying degrees of outer strabismus, this kind of myopia glasses after the, must often wearing glasses, and the need to half a year review once. Juvenile mild myopia is available in to see distant when the wearing glasses, to see near O'clock Remove the; moderate and high myopia regardless of to look too far and to see nearly all must long-term wearing glasses. There are many parents think that "glasses the degree will the more wear the more deep", in fact, the deepening of myopia, mainly depends on with eye health, with the wearing not wearing glasses no relationship, do not wear glasses myopia is also still want to deepened, or even to deepen even more fast. While the astigmatism eye patients, whether it is simple, or mixed Xingu, the degree is how to, as long as there and consciously symptoms, respect of must often wear glasses.

Myopia wearing glasses will not the more wear deeper

The relevant studies show that, Dai Ray Ban Wayfarer Glasses after the degree to deepen it or not primarily related to not pay attention to with eye health, wiring’s spectacles degree of inappropriate, eyeball itself is posterior diameter of the variable-length and other relevant, while the with the long-term wearing glasses relationship not big, disease rational degree of myopia Although the constantly deepened, but this is also pathological myopia one of the characteristics, yes ocular dyspepsia caused by the, with the wearing glasses has nothing to do. Needs of the environment, as well as diaper the number of shades, whether need for frequent wearing glasses there are the following are several principles available for reference:

1, the mild myopia's adolescents, due to peacetime more with the eye, culinary muscle function is unstable, so no matter look at the distant or look at near objects Du should be wearing glasses.

2, moderate myopia (myopic degree in the 300-600 diaper), and accompanied by astigmatism of the patients, it should be frequently wearing glasses.

3, high myopia (diaper in more than 600), with or without astigmatism, should always wear goggles.

Four, adults in the 200 diaper the following's mild myopia, non-close range workers, looking at near O'clock can not wear glasses, to look too far O'clock (such as watching TV. etc.) Want to wearing glasses.

This shows the event that patients with myopia experience light optician after the, often wearing does not make the myopia deepened. But if the not pay attention to with eye health and scientific use of eyes, or a casually borrow other people's Cheap Ray Ban Sunglasses, and then the myopia yes will continue to deepens.

Glasses eyesight clear there is some eye disease only through strict eye examination, in the correct trust under the guidance of doctors wearing Ray Ban Outlet sunglasses.

As people develop an understanding of Optometry knowledge, concepts are increasingly being accepted by all of the medical optometry, medical optometry has a canonical process, each step has a fairly important element of specific content in their understanding of the people there are still many misconceptions.

History asked and the eye check is medical optometry process in the first step, but often is people in enjoy mirror process in the most will ignored of is, also usually not too understanding, often will asked just enjoy Cheap Ray Ban Sunglasses why also to by eye doctor check doctor does? Notes vision bad of reasons has many, does not necessarily just simple of flex light problem: myopia, and hypertrophy, and astigmatism, and of Presbyopia, also may east other eye disease accompanied flex light not are while exists, or flex light problem is eye disease caused of.

Eye disease to in addition to flex light problem on address has, and patients themselves caot correct judgment reasons, caused misdiagnosis errors treatment of phenomenon often, such as hypertrophy enjoy into myopia; myopia degrees deepened actually not because degrees not but tapered coeal caused of; enjoy reading glasses Sui no found glaucoma and delays treatment timing eventually led to not reversible of vision lost,, therefore in optometry enjoy mirror Ian for system of eye check is particularly important.

Can be identified by checking: 1, children and youth: is true myopia, poor vision is resolved through enjoy Ray Ban Wayfarer Glasses, for myopically, glaucoma, Keratin (characterized by rapid increase in myopia and astigmatism, significant degradation of vision correction) and other congenital diseases; 2, middle and old-aged: is there a blinding eye diseases such as cataract, glaucoma.

Eye pain, tearing, memory loss, dizziness brain up, sleep well ...... these symptoms may be related to degree allowed to wear reading glasses on.

Glasses must be checked before

"Most of the elderly often less than dazzled the hospital for examination, but directly with Ray Ban Outlet sunglasses and even buy into a mirror, in fact, there is great harm." According to the Eye Hospital, Professor, "the elderly glasses must first undergo an ophthalmologist examination to exclude senile eye diseases such as cataracts, glaucoma, retinal diseases such as senile variety of osteopathy, hypertension, or diabetes-induced retinal hemorrhage, these age-related eye disease can affect vision, only in the disease has been effectively treated, and stable circumstances to optometry. "

Glasses must optometry

"Older people with glasses (including glasses) must optometry, optometry and must be accurate. EYE not just the elderly, old age, myopia, hypertrophy, astigmatism usually has a degree of change." According to Professor explains, "because with age the growth of the eye refractive system will change, such as the density increases, decreased transparency, Quizzes rate there will be changes in the refractive state of the eye and the young man is not the same, it must be re-accurate optometry, optometry results to be combined with a suitable his reading glasses. "

Buy into a mirror against big

"EYE can not just buy into a mirror. Reading glasses vary, if degree allowed, can not solve the problem of Presbyopia, but will increase as fatigue, wear a long time can cause eye. Many older people tend to buy a lot of reading glasses, results are not a right, and often sleep well, eye pain, memory loss, dizziness brain up and so on, if you do not just buy Ray Ban Wayfarer Polarized sunglasses, but accurate scientific optometry glasses, these problems will be solved, the elderly people not only can greatly improve the quality of vision and quality of life, while improving the whole person's mental condition. "Professor also reminded," casual wear someone Else's glasses or his wife shared a two glasses, will increase the visual fatigue, eyesight harm than Big. "

UV filters

According to the Professor, the elderly should also have a UV filter can effectively with protection glasses, which can prevent age-related eye diseases such as cataracts, oracular lesions. With reading glasses on, you can also choose plus film has a protective function of the material.

Original refractive errors in the elderly (such as nearsightedness, etc.), there has been EYE, frequent change in order to solve the problems Ray Ban Wayfarer Glasses, appeared on the market at present progressive multiform glasses, a pair of glasses can have multiple functions, see far, look at the past, seeing all rows, you can maximize the visual quality, popular in the elderly alike. It is understood that this is currently the most popular form of functional glasses, wear abroad elderly ratio exceeding 70%, but the price is relatively higher.

Experts, with Ray Ban Outlet Sunglasses correction should be based on the principle of low-grade, such as wearing 350 degrees or 400 degrees of myopia, vision correction can reach 1.0, and you should choose 350 degrees of myopia. In optometry when corrected visual acuity of 1.0 as a standard, not in order to allow for unlimited corrected visual acuity increased to 1.5 degrees to avoid optician 1.5 vision. At the same time the same myopic astigmatism. Some people plus astigmatism, the feeling of dizziness, visual distortion, vision correction should not affect the case, reduce or remove astigmatism, a process of adaptation to the eyes, three or six months after the addition of astigmatism. High myopia can not accept all corrective glasses, should be wo low glasses, to be adapted and then increase the degree, the degree increments should not exceed 300 degrees.

In addition, in real life for many elderly people do not pay attention to wear old mirrors, just buy a pair of glasses to wear. Elderly should be how to choose, configure an appropriate old mirrors it? Best to the formal, reputable optical shop to find a qualified optometrist and inform their glasses use, according to the optometry prescription, with their own face, parameters and prices to pick the right glasses frames and glasses, Ray Ban Wayfarer Polarized shops will follow optometry prescription parameters and requirements for processing production, the finished glasses, the indicators should be consistent with the national standard requirements. Buy old mirrors in the field, experts remind to by professionals help to ensure that the selected optical center of the old mirrors horizontal distance with their IPD match.

The following is a summary of some professional experience, for your reference:

1, hypertrophy: Average to the highest number of best corrected visual acuity better. If a child has hypertrophy and isotropic associated symptoms, must wear corrective glasses full.

2, astigmatism: mild asymptomatic do not glasses. If decreased visual acuity, visual fatigue, and mild symptoms should be prepared regardless of the right glasses. High astigmatism and axial deflection, the patient is not easy to accept, may be appropriate to reduce the diaper. Astigmatism is wearing all the general principles of corrective glasses. Astigmatism in the audition piece is sure to pay attention to axial adjustments. Often axis potentiometer 50 will affect vision correction. Can not be discharged, visual fatigue symptoms.

3, myopia: Request to minimize refraction, best corrected visual acuity, wear appropriate Ray Ban Wayfarer Glasses. (If the patient is not in use regulation case, use-5.000D corrected visual acuity was 5.0 when used with-4.50D adjusts audition corrected visual acuity was 5.0, generally with-4.50D glasses better.) To avoid overreaction, (especially near more patients from work) cause visual fatigue symptoms. High myopia glasses for the first time, the patient can not accept all the diaper correction. May be appropriate to reduce the diaper to adapt over time, and then to increase it.