Many people can not see things clearly, just go to the street to buy a pair of eyeglasses on the stall, or borrow someone else’s glasses to wear, regardless of the size of the degree of the other people’s glasses, their own suitability is not appropriate, as long as you can see more than the original clear some on the line. This practice is very bad for the eyes, will damage vision. So, how to wear glasses to science? First of all, optometry is not an ordinary commercial operation, but a strict medical behavior. Medical optometry is a prerequisite for the correct prescription of glasses, which is fundamentally different from ordinary optometry: ordinary routine optometry can only produce rough optometric results, and cannot determine the cause of poor vision; medical optometry can be fine-tuned with a comprehensive optometry instrument on the spherical lens degrees, astigmatism, astigmatism axial position, and accurately diagnose the refractive state of the patient and the condition of the eye muscle regulation abnormality. In addition to precisely checking the refractive error of each eye, medical optometry must check the balance of both eyes, eye position, adjusting power, pupil distance, etc. It emphasizes the improvement of the visual function of both eyes and pays more attention to the personalized physiological state of the eyes, which avoids the simple and uniform mode of the traditional dispensing method, comprehensively eliminates the eye fatigue and discomfort before and after the dispensing of eyeglasses and achieves the efficacy of prevention and treatment for some eye diseases. Medical optometry has professional ophthalmology as the technical backing, doctors have extensive clinical experience, if in the process of optometry found in other eye problems, can be diagnosed and treated in a timely manner, to prevent. Throughout China’s current optometry status quo, there is not standardized and unscientific aspects, then how to get out of these misunderstandings? 1, fast and simple optometry Optometry is a rigorous process, can not just rely on computerized optometry or inserts, simply check the visual acuity for a few minutes to solve the problem. A set of scientific standardized medical optometry time required is at least 20 to 30 minutes. 2, without eye examination There are many reasons for poor vision, not necessarily just simple myopia or astigmatism. Before optometry, systematic eye examination should be conducted to exclude other eye diseases, early detection and early treatment to avoid delay in diagnosis and treatment. 3, no need to dilate the pupil It is well known that young people under the age of 18 should be dilated optometry, however, over the age of 18 adjustable myopia, hyperopia should also be dilated optometry, in order to relax the adjustment, to get an accurate degree of optometry. We have encountered several myopic patients around 20 years old, in different eyeglasses stores to get very different glasses prescription, some even differ 500~700 degrees, after we dilate the pupil using comprehensive optometry examination, found that there is no need for prescription glasses. 4, the lower the better myopia prescription principle is the best corrected visual acuity of the lowest degree, but this does not mean that the degree of the lower or higher the better, the degree is too low still see the fuzzy image, but more likely to promote the development of myopia; degree is too high to increase the regulation, the same cause visual fatigue, leading to the further development of myopia. 5, the pursuit of the same degree in both eyes when prescription lenses should achieve the corrective effect of both eyes, the visual quality of the same, rather than blindly pursuing the same degree in both eyes, otherwise it will interfere with the visual balance and development of both eyes. 6, vision loss must be myopia When young people just appear vision loss, must go to the regular eye hospital or optometry clinic for systematic examination, dilated optometry, in order to determine whether it is myopia or astigmatism or hyperopia and other refractive errors and degree, at the same time, exclude the pseudomyopia, do not easily deducted on the myopia of the hat, should not be wearing glasses when wearing glasses on the glasses. 7, the glasses will wear deeper and deeper myopia degree development and wear glasses is not directly related. Myopia patients wear appropriate glasses, pay attention to eye hygiene, myopia will be stabilized at a certain level. However, if you think that everything will be fine after wearing glasses, and do not pay attention to eye hygiene, and continue to keep your eyes in a state of fatigue for a long period of time, it will lead to vision loss and myopia will deepen. In addition, wearing inappropriate glasses, such as: no optometry or optometry is not allowed, the prescription is too large, will increase the burden on the eyes, so that vision loss, myopia deepened. Some people with high myopia (more than 600 degrees), although insist on wearing glasses, but the degree will still deepen, accompanied by changes in the fundus, medically known as pathologic myopia. This kind of myopia deepens with the degree of myopia and family related, and wearing glasses has nothing to do. 8, presbyopia casually buy a pair of glasses can be presbyopia is due to old age lens hardening or partial hardening, the light sense of the regulation is insufficient, resulting in see close or read unclear. Presbyopia is directly related to the degree of comfort when reading, not just buy a pair can be, wearing inaccurate presbyopia, there will be visual fatigue, and even headache, dizziness, nausea, vomiting and other symptoms. 9, myopia will not presbyopia myopia is to see far to see, to wear myopic glasses to see clearly. And presbyopia is the decline in regulation, see objects close to the need to reduce the original degree. Myopia and presbyopia are two very different concepts: the former is a refractive error, the latter is a physiological phenomenon. 10, presbyopia is farsightedness presbyopia and farsightedness are very different concepts. Presbyopia is a physiological phenomenon of aging with human age. And farsightedness has nothing to do with age, is a refractive error. 11, eye presbyopia, should not prematurely wear presbyopia, or a put on can not leave the presbyopia and wear presbyopia has nothing to do. Do not wear presbyopes can not control the deepening of the degree of presbyopia. Therefore, once a person enters the age of presbyopia, when the symptoms of presbyopia have already appeared, he should wear appropriate presbyopia glasses. Moreover, after 4 or 5 years, with the deepening of the degree of presbyopia, it is necessary to match the deeper presbyopic lenses to maintain the comfort and normal function of the eyes to see near, and to improve the study and work efficiency. 12, the result of optometry is prescription prescription The degree of optometry and the final prescription of glasses is often not the same. This has a strong skill and experience, need doctors or optometrists according to the patient’s age, refractive error size, visual acuity, strabismus and the purpose of the prescription and many other factors to consider, and finally issued a prescription. The main purpose of the prescription is to improve visual acuity, reduce symptoms, solve visual fatigue, diplopia and strabismus, and establish binocular monovision. 13, astigmatism does not need to be corrected Mild regular astigmatism, such as no visual fatigue or vision loss, there is no need for treatment; if visual fatigue and vision loss, although the degree is not high, must be corrected with a column lens, and must be worn frequently. If the degree of astigmatism is too high and the patient cannot accept it immediately, low correction can be given first, and the degree of astigmatic lenses can be increased gradually later. 14. Do I need to wear lenses for a long time after prescription? When myopia has been diagnosed as true myopia and the degree of myopia is more than 100 degrees, appropriate myopia glasses should be worn to correct it. Once you have been prescribed glasses, you should wear them except for washing your face and sleeping, because with proper glasses, the myopic patient is in a state of orthokeratology, where regulation and convergence are restored to their natural relationship. Wearing glasses is not only to improve vision, but also in the appropriate distance reading and work, so that the eye regulation and convergence function has a normal coordination between the relationship, to avoid eye fatigue. Look at the computer glasses should be shallower. Working in front of a computer screen for a long time, the eyes protest: tearing, foreign body sensation, poor vision and even vision loss. Experts believe that it may be worthwhile to wear old glasses in order to avoid eye fatigue due to over-adjustment of the eyes permanent eye injury. It is better to have 125 degrees difference in the prescription of the old glasses than the new ones. After getting an accurate prescription, it is also important to choose the right frame for your glasses correctly and scientifically. First of all, we should fully meet the optical requirements of the lenses, fully consider the interpupillary distance, fitting distance, tilt and so on. From the ophthalmology point of view, the optical center of the lens must be the same as the center of the pupil, otherwise the lens will have a prismatic effect, which will interfere with the visual function, and dizziness, dizziness, distortion of vision, soreness and fatigue of the eyes, etc. will occur after wearing the lenses. Secondly, according to the shape of your face, choose the frame with style and color suitable for you. Some people don’t pay much attention to wearing eyeglasses, just buy a pair of eyeglasses at the store or vendor, or take other people’s eyeglasses and wear them indiscriminately, which is very improper, and the result can only aggravate eye fatigue and make the eyesight worse and worse. But with good glasses does not mean that you can do it once and for all, glasses also need regular maintenance, usually do not use clothes or napkins to wipe the lens, take off and put on the glasses to use both hands, one-handed force is not uniform, the frame is very easy to deformation, there are any problems should be dispensing glasses to go to the place to debugging, while wearing glasses is the best every 3 months or half a year to check once to see if there is any change in the number of degrees. A pair of sunglasses is necessary in summer, but if you choose a pair of poor quality, unqualified sunglasses, not only can not resist ultraviolet rays, and will make the pupil dilation, as a result, the lens of the eye to ingest more ultraviolet rays. So sunglasses are not optional decorations. So, what should be noted when choosing sunglasses? First of all, we should pay attention to the anti-ultraviolet mark, anti-ultraviolet is the primary function of sunglasses, some sunglasses lenses or packaging “100% anti-ultraviolet”, “UV400”, “anti-ultraviolet” and other markings. UV400″, “UV protection” and other markings. If you wear a poor quality sunglasses that can not block ultraviolet rays, the ultraviolet rays into the eyes than when not wearing sunglasses, more likely to lead to eye damage. Secondly, the color of the lenses should be chosen based on the principle that the color of the surroundings should not be distorted, the edges of the objects should be clear, and the different colors of the signals can be identified effectively. The color of the lens is better in gray, teal, and green because these colors absorb infrared and ultraviolet rays better. Generally speaking, the deeper the color of the lens, the stronger the shading effect, but it does not mean that the ability to prevent ultraviolet rays is stronger, the function of sunglasses to prevent ultraviolet rays is also related to the material and process of the lens and other factors. Lens color is generally good to medium depth.