Abstract: many people think that their eyesight has been set. As long as myopia glasses are not bad, they will have no problem wearing them for several years. Even some elderly people have the habit of “wearing a pair of glasses for decades”. In fact, this practice is incorrect., In fact, many people have no idea about the service life of frame glasses. The glasses are not broken and the degree is enough. Many people wear a pair of glasses with oxidized yellow lenses for many years. No wonder their eyes are always tired!, Most people only consider changing their glasses when they can’t see clearly, the frame is broken, or they obviously feel uncomfortable. However, if the glasses are not broken and the degree is enough, they should be replaced in time according to the situation., Do you know why you need to change your glasses?, The lens will oxidize and turn yellow after long-term use, and the clarity and transmittance will be reduced. In addition, some lenses have poor wear resistance and will be worn and scratched to varying degrees, which will cause eye fatigue and aggravate myopia in severe cases., Therefore, there are four purposes for changing glasses: first, the lens is fresh and the surface of optical lens will be worn during use. Resin lens can absorb ultraviolet rays, but at the same time, the lens will also age and turn yellow. These factors will affect the light transmittance. Second, the prescription will change year by year. With the change of age, the eye environment and degree will be different, The refractive state of human eyes has been changing, so we have to re optometry every one to one and a half years!,
in fact, many people have no concept of the life of frame glasses. The glasses are not bad and the degree is enough. Many people wear a pair of glasses with oxidized yellow lenses for many years. No wonder their eyes are always tired!
most people will consider changing their glasses only when they can’t see clearly, the frame is broken or obviously feel uncomfortable. However, if the glasses are not broken and the degree is enough, they should be replaced in time according to the situation.
1 so do you know why you need to change your glasses?
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lenses will oxidize and turn yellow after long-term use, and the clarity and transmittance will be reduced. In addition, some lenses have poor wear resistance and will be worn and scratched to varying degrees, which will cause eye fatigue and aggravate myopia in severe cases.
therefore, there are four purposes for changing glasses:
first, the lens is fresh, and the surface of the optical lens will be worn during use. The resin lens can absorb ultraviolet rays, but at the same time, the lens will age and turn yellow. These factors will affect the light transmittance.
second, prescription, The annual meeting changes
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. With the change of age, eye environment and degree, the refractive state of human eyes has been changing, so we have to re optometry every other year to a year and a half!
third, the accessories are replaced regularly. In order to provide maximum comfort, the new spectacle frames are made of bionic materials, but it is also recommended that users replace these aging accessories every three months to six months, just like the auto parts that are easy to age and the tires are replaced regularly, so as to make the glasses full of vitality!
fourth, adjust the angle at any time.
must maintain an angle consistent with the line of sight, otherwise you will not see the target clearly, and this angle will change with the repeated removal and wearing of glasses, so it is very important to go back to the glasses store regularly for adjustment.
therefore, many people think that the vision has been set, and the myopia glasses are not bad, It’s no problem to wear it for several years. Even some elderly people have the habit of “wearing a pair of glasses for decades”. In fact, this practice is incorrect.
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whether wearing myopia glasses or presbyopic glasses, they need to be checked regularly and replaced in time in case of discomfort. Ordinary myopia patients should usually change their glasses once a year.
2 how long does it take for children to change their glasses?
children and adolescents are in the stage of growth and development, which is the peak period of eye use, and the degree changes very fast. Due to long-term close eye use, myopia is easy to deepen. Children and adolescents need to go to a professional eye hospital for reexamination every 3 months or half a year. If glasses are no longer suitable for children, they should replace them in time.
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3 adults: generally,
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should be replaced once a year and a half to two years. Due to the relatively stable degree, the optometry frequency and initiative of adults are far lower than those of children and adolescents. Even some adults are lazy to do optometry, but only match glasses directly according to the original degree of glasses. These are incorrect practices. Medical optometry is also required for adult glasses. Adults should generally change their glasses once a year and a half to two years.
4 the presbyopic glasses of the elderly should also be replaced regularly.
out of thrift, many elderly people wear presbyopic glasses for several years or even more. There is no uniform time limit for the replacement of reading glasses. When the elderly feel hard to read the newspaper with glasses and their eyes are sour and swollen, they should be replaced.