In the beginning, go to eyeglasses store of good reputatuin to do opthalmic test.After the eyes test, ask optometrists for your prescription. They should give it to you by law.A word of caution:it is necessary for you to get a professioanl guy to help you when you purchase reading glasses.to assure the accuracy of your progressive glasses with the centre of lenses coodinating with the centre of your eyes.As to the quality of the glasses frame, you need pay attention to following points:Elasticity is an important factor to frame quality.The coating of quality frames should be bright and smooth.The frame with smooth, small and symmetrical welding spots will be better in quality.The product parts of good frames should be firmly fitted.The lenses' size and shape of quality frame should be just the same, and the nosepiece shoulde be symmetrical.When the old people buy progressive glasses.both common lenses and progressive lens are not bad choices.It is good if the transmission of light is good.While, the lenses of old people are harder and harder.The adjustable ability and eyes organization gradually go out of commission as well.For the purpose of clear vision when look at near things or things far away.one will benefit more to purchase progressive glasses or progressive lenses.They are more helpful in protecting eyes.reading eyeglasses & glasses is cheap.
Short-sightedness, a universal public health problem, arouses care and caution all over the world. The inheritance and environment are two elements that lead to the youth's myopia, which is demonstrated by myopia experiment and epidemic research. The environmental factor is of great importance, the former is the pathological myopia. The genetic factor is the biological precondition and possibility during the development of students' myopia. But the environmental factor is the significant condition which decides whether it happens and how to develop; so the main reason for shortsightedness. in school-days is long period write and read at short range and together with the influence of hereditary factors.
The precaution of shor-sightedness for kids and adolescents.
1.Employ a pair of glasses. Glasses are the primary means for correcting myopia. Till now there are mainly leans: no line bifocal. Progressive multi-focal lenses defer the development of myopia by changing brightness so as to block the vicious cycle caused by regulation of axial elongation and alleviate eye fatigue. The survey shows that positive effect can be seen after children with myopia wearing the no line bifocal.
2.Laser eye surgery.Excimer laser corneal refractive surgery one of the fastest developed medical high-techs, is approaching perfect, Adolescents, who are growing up, should be given much caution on the operation.
3.Take pillsAlthough the mechanism of the eye changes of myopia is not clear, there're remain a variety of drugs can prevent its development.
The first thing that comes to mind when one thinks of sun protection is to protect skin, hardly think of protecting eyes. Instead, surveys show that ultraviolet radiation is the main cause of some eye diseases, such as keratitis, cataracts, retinal damage. So, we can't ignore the eye injury caused by ultraviolet radiation.
Don't look directly into the sun. Eyes are very fragile. One may feel dizzy after looking up to sun for a short while. One may suffer from pain, tears, inflammation and blurred vision if he/she looks up to sun for a long time.
As is known to all, eyes are fragile and susceptible to ultraviolet radiation which would easily injury eyes. The 280nm ultraviolet radiation does maximum damage to the cornea and seems to cause conjunctivitis. The ultraviolet radiation with 290-400nm wavelength causes great damage to the lens, and it is also the cause of cataract.Surveys show that if you bask yourself in the sun for one more hour every day, the rate that you get cataract increase 10%.And now we should talk about some precautions.
When you are outgoing in summer, remember to wear broad-brimmed hat or use umbrella, a pair bifocal eyewear is most effective in protecting your eyes. What is noteworthy is that the quality of bifocal lens is very important to the health of eyes. Poor sunglasses are not helpful in protecting your eyes; instead, they may cause a lot of problems to eyes. Prepare a pair of UV-cut sunglasses for summer use, and you will benefit a lot. Medical study has turned out that it is wrong that the darker the better in terms of lenses. Grey is a preferential choice. It is better for contact lens wearers to buy anti-ultraviolet ones which cut 90% ultraviolet rays. If possible, you'd better wear bifocal eyewear too.You'd better not go outside at noon when the sun is strong and are likely to threat the security of skin and eyes.
Recent years, more and more middle aged people suffer from hyperopia. So the bifocals enjoy higher and higher market shares.However, you have to spend some time in adapting to the multifocal eyeglasses if it is your first attempt on it. Now let me introduce some useful information for you to adapt to your new glasses quickly and correctly.
How to see the objects in different distances when you wear bifocal or progressive glasses for the first time?
People think of sun protection as skin protection, seldom have eye protection in mind. Actually, some studies suggest that UV rays are really harmful to eyes and may cause keratitis, cataracts, retinal damage and so on. Thus, delicate eyes need our special care in heat summer days.
Never direct view sun, especially when it is strong. The eye is a delicate tissue. If one looks at sun directly for a moment, he/she may be dizzy to watch. Long-term direct view to sunlight will cause pain, tears, inflammation and blurred vision and even hurt retina.
As everyone knows, eyes are sensitive to bright sunlight and can absorb ultraviolet radiation of any kinds. The UV ray of 280nm wavelength damages the cornea most badly and it brings about the conjunctivitis. The UV rays with the wavelength of 290-400nm are harmful to lens, which would result in cataract. Surveys show that if you bask yourself in the sun for one more hour every day, the rate that you get cataract increase 10%.So then what shall we do in daily life?
Wear hat or raise a parasol when you are outing. At the same time you can wear bifocal eyeglasses which are also effective in protecting eyes from sunshine. It is worth notice that only quality progressive glasses are good to your eyes and effective in protection. Sunglasses of poor quality can't help in protection but result in injury to eyes. It is necessary for you to have a pair of sunglasses with a special coating that locks UV light in summer. Medical research shows that it is unnecessary to choose lenses with too dark color. Grey and light grey are more effective in blocking UV rays. People with contact lenses may also wear those with anti-UV function which are effective in cutting 90% UV rays. It will be better to wear a pair of progressive eyeglasses.You'd better not go outside at noon when the sun is strong and are likely to threat the security of skin and eyes.
Glasses frames play an important role in dressing up and showing personality.But, the quality of lenses is very important to your eyes. Hence, you'd better check whether the lenses are produced by normal factories when you choose lenses. There is an obvious reduction on the glasses' price because of the sharp jump on the online optical stores.You can find lots of discount eyeglasses by browsing relative websites.Then, how to buy eyeglasses online? Take, for example, shopping for reading glasses. Firstly, go to professional glasses stores or ophthalmic hospital to examine your eyesight.With your prescription, you can choose any kinds of glasses that are suitable for you. Next, visit the online optical stores and pick up the right frames and reading lenses. You may find the price in different online optical stores is not the same.By contrast, you will find a store beats other down by quality products and low price. Buy there. You can go to some online optical stores advance to see the information of different eyeglasses. Pay attention to the details on these websites which offer discount eyewear, and astonishing discoveries are waiting for you.