Contact lens are also known as corneal contact lens, because of better optical effect, they apply to groups such as high degree of anisometropia, monocular - free crystal, irregular astigmatism of corneal and so on. Especially for those in high prescription sunglasses myopia and some professional personnel who are not supposed to wear framed glasses, such as actors, athletes, restaurant waiters and so on.
A great advantage of contact lenses is it's very beautiful. It can show people's natural beauty, so it's well received by the public. Currently the number of people who wear contact lenses is growing in the world, to a certain extent, the contact lenses have been gradually replaced ordinary glasses. The contact lens made by different manufacturers is basically made of the same material, so are the functions.
Earliest material used in rigid contact lenses is polymethacrylate (PAMN). Soft contact lenses is most widely used on the market currently. Its material is poly-hydroxyethyl methacrylate (HEMA). It has a certain degree of air permeability and high water content, and it is comfortable to wear. Abandon stealth eyes do not mean the traditional kind of eye lens appears obvious discomfort or sediments from the contact lenses when necessary to abandon the use of the most secure, but the cost is higher. Another semi-rigid type prescription eyeglasses glasses are mainly made of fluorinated silicone, and are characterized by high permeability, good optical effect and a life expectancy of up to 3 - 5 years.
Check the eyes before buying lenses. People suffering from trachoma, keratitis, conjunctivitis, hypertension, diabetes, endocrine disorders and other diseases, as well as minor children, should not wear contact lenses. Regardless of any kind of contact lenses, especially for soft contact lenses, due to electrostatic interaction on lens surface, it is easy to adsorb sediment. Leading to changing of lens performance, and cause eye complications, such as corneal edema, corneal infection, conjunctivitis, acute and chronic ocular hyperemia, etc. Therefore, people who wear contact lenses should have a certain cultural qualities and health knowledge, so that they can wear them healthily.
Even the best lenses can not be ignored, in daily life, use multi - functional maintaining fluid to clean lens and use efficient cleaning sheet containing egg enzymes to dissolve protein deposition on the lenses. In order to make eyewear lenses more comfortable to wear, and the lenses are longer life, and you must not be too troublesome for the easy way, you must adhere to care procedures of the lenses. At the same time to maintain the storage box for cleaning, to avoid the syrup bottle contact with other items. Wash hands before contact lenses, used to place three months should be thrown away without medicine, because medicine could be easily contaminat
As the lenses for invisible eyes are usually more thin, and the wearers should not have too long fingernails, so as to avoid damaging lenses. Each lens has a certain life span, paying, long-term wear those eye health and care practices, shall comply with opticians guidance, regular replacement lenses.
Regular eyes check is necessary, contact wearers should do at least once check in half a year, the newer should do check in a week, if some uncomfortable symptoms appears, immediate doctor visit really needs. Do not keep wearing contact lenses longer than a specified time. Do not wear contact lenses and swimming or bathing in order to avoid affecting of the eyes and disappearing of the lens.
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