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With the continuous progress in the contact lens field, more and more folks who need vision correction choose or switch to contact lenses. As small curving pieces of plastic, contact lenses can adjust themselves well into the wearers’ eyes. Contact lenses help the wearers regain normal vision in the same way as corrective eyeglasses. Both of these two types add an extra refracting surface over the eyes, focusing light properly on the retina. Both corrective eyeglasses and contact lenses can deal with common vision problems such as nearsightedness, farsightedness and astigmatism. The main use of contact lenses is to help people with myopia. Secondary purposes include astigmatism, hyperopia, presbyopia as well as aphakia. In addition, contacts made of different materials have slightly different functions. Rigid lenses are especially suitable for people who have some ailment of the cornea. And soft contact lenses can serve as bandages for conditions including bullous keratopathy, recurring cornea corrosion and so on. Different functions mentioned before come from the exact materials that make up contact lenses. Soft link lenses are made of water friendly plastics. They always maintain enough moisture and thus sit easily on the eye surface. Soft contact lenses are lightweight and every comfortable. In some cases, the wearers can not feel their lenses. The other main type is rigid gas permeable contact lenses, which are made of more durable kinds of plastic. RGP lenses allow oxygen to circulate through the eye and into the retina. As stated before, the two types suit different conditions. Providing a huge variety of options, contact lenses still have certain advantages over eyeglasses. It can be common that some eyeglass wearers are not happy with their show in glasses. Contact lenses can solve this concern every well. A second problem with eyeglasses is that they may slip off the nose in an unwanted situation. Contact lenses sit more safely on the eye surface. If you want to know more about contact lenses knowledge, then feel free to visit http://blog.firmoo.com/contact-lens Default Author Bio: Firmoo.com is the fastest growing online community selling affordable yet high quality prescription eyeglasses, prescription sunglasses and other eyewear. Firmoo’s return and refund policy makes your purchase with Firmoo risk-free.
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