4hw.org: many people are short-sighted and don't like wearing glasses. On the one hand, it affects the beauty. On the other hand, it's because the muscles around the eyes will deform and form dead fish eyes. In most cases, they will choose to wear contact lenses. But not everyone who is short-sighted is suitable to wear contact lenses. Let's take a look at the taboos and common sense of wearing contact lenses!
Who is not suitable to wear contact lenses?
Primary and secondary school students: in the period of vigorous growth and development, the optic axis of the eyeball has not been shaped. Contact lenses should be cleaned and disinfected every day. The procedures are cumbersome and inconvenient to adhere to. Therefore, ophthalmologists pointed out that: primary and secondary school students should be cautious when wearing contact lenses. If not necessary, they should wear frame glasses.
Middle aged and old people: the eye tissue has undergone obvious degenerative changes, and the local resistance of the eye, especially the ability of the eyeball to tolerate hypoxia, is reduced. If a thin layer of lens is put on the eyeball surface at this time, it will lead to anoxia of the eyeball, and complications such as corneal infection and ulcer are easy to occur. Especially for the elderly over 60 years old, wearing it is easy to cause serious complications and permanent visual impairment.
Allergic patients: wearing contact lenses is easy to cause complications, such as slight inflammation, eye itching and swelling, conjunctivitis and eye swelling. If not treated for a long time, vision may be endangered. If it is necessary for allergy patients to wear it, it is better to use it only during the day and stop wearing it at least one day a week. In case of inflammation, please stop using. If the inflammation is not relieved after 2-3 days, you should go to the hospital immediately. Patients with glaucoma, chronic dacryocystitis, conjunctivitis, corneal ulcer, hyperthyroidism and other diseases:
If you have contact lenses and your eyes are in the inflammatory phase, wear them after the inflammation disappears. In addition, the following conditions are not suitable for wearing contact lenses: fever: the local resistance of the eye is reduced, the metabolites of bacteria are deposited between the cornea and the lens, resulting in the decrease of oxygen permeability of the soft lens, the normal metabolism of the cornea is interfered, thus causing bacterial corneal ulcer. Cold: cold patients often have a large number of germs on their hands, which are easy to enter the eyes when they take or wear glasses. In addition, cold often accompanied by mild inflammation of the retina, wearing glasses will aggravate the inflammation. Many cold, cough and pain medicines contain ingredients that inhibit tears. The decrease of tear secretion will make the contact lenses too dry, reduce the transparency, and then affect vision.
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Menstrual women: because the intraocular pressure is often higher than usual, and the blood around the eyeball is more easily congested, especially for women with dysmenorrhea, if wearing glasses at this time, it will have adverse effects on the eyeball. Pregnant women: hormone secretion changes, so that the body water content also changes, some swelling of the eyelids, corneal thickening, will not match the normal selection of contact lenses, resulting in eye discomfort. Pregnant women with edematosis gravidarum are particularly unable to wear them.
Long distance travel by bike: reduce the water content of the soft mirror, make the lens dry and hard gradually, and make the eyes uncomfortable. If the lens is hard for a long time, it will damage the cornea, causing eye pain or bacterial infection.
Contact lens care fluid used up, can use mineral water instead?
May not. Contact lens care fluid has the functions of sterilization, moisturizing and removing protein precipitation on the lens, while mineral water has no such functions.
Contact lenses exceed the wearing cycle, but they are clean and undamaged. Can you continue to wear them?
Do not continue to wear. With the increase of use time of contact lenses, the ability of anti bacteria and anti protein precipitation of the lenses and the oxygen permeability of the lenses are gradually decreasing, and the water locking capacity of the lenses will be reduced. These changes will easily lead to the enhancement of foreign bodies during wearing, which may lead to a series of corneal diseases, such as keratitis, corneal neovascularization, corneal edema, etc. It is generally recommended that contact lenses be replaced before the use cycle.
It's very convenient to use the lotion without rubbing. Can you omit the steps of rubbing the lens?
Do not omit the steps of rubbing the lens. Experiments show that rubbing lens is more important than choosing nursing solution. Under the microscope, the protein deposition of rubbing contact lens will be significantly reduced. In addition to moisturizing, cleaning, sterilization and storage, the most important thing is to remove protein precipitation. Protein deposition to a large extent affects the health of the eyes, affecting vision. It is difficult for the nursing solution to dissolve the substances stuck on the lens. If it is not rubbed and cleaned, it will not only affect the use time of the lens, but also cause various eye diseases and inflammation.
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Contact lens quality is good, can sleep at night wear overnight?
It is not recommended to wear contact lenses overnight. The cornea needs enough oxygen supply. When the eyes are closed, the amount of oxygen that the cornea can contact is greatly reduced. In addition, the contact lens barrier makes the cornea in a serious oxygen deficient environment. For a long time, the cornea may cause a series of eye diseases due to lack of oxygen. Now there are some contact lens products on the market that can be worn to sleep. In fact, it refers to daytime naps, which should be taken down every day at night. Generally, we suggest that the wearing time of contact lenses should be no more than 8 hours and no more than 10 hours every day.
Although color invisible eyes are fashionable and good-looking, they will hurt your eyes?
Choose a regular brand, and strictly follow the doctor's instructions to wear, color contact lenses are not harmful to the eyes. However, the following points should be paid attention to when wearing color contact lenses:
1. Try not to wear color contact lenses at night. Because there are colors around the color contact lenses, and the size of the central transparent optical area is limited, the pupil of the human eye will expand when the light is insufficient, so the field of vision and clarity at night may be affected.
2. The oxygen permeability of color contact lenses is low, long-term wearing may lead to corneal neovascularization and corneal edema and other eye diseases, so the time and frequency of wearing should be strictly controlled.
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The lens with high moisture content moisturizes better, not easy to dry eyes?
The higher the water content of the lens indicates that the contact lenses normally need more water. On the premise of the same lens material, the higher the water content, the better the oxygen permeability, the softer the lens, and the more comfortable it is to wear. However, the higher the water content of the contact lens, the stronger the water absorption, the easier it will absorb tears, and the more dry the eyes.
Contact lenses directly contact eyes, wear a long time there is a security risk?
In general, it is safe to wear contact lenses. First of all, a detailed eye examination must be carried out. According to the doctor's guidance, the contact products that are normal, qualified and suitable for you must be worn. Secondly, the lens cleaning, regular reexamination, and regular replacement of lens and accessory products are required every day. If the above points can not be achieved, there will be certain potential safety hazards.
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