People who need vision correction can usually choose between glasses and contact lenses. Some prefer glasses because they’re easier to wear and easier to take care of. But many people find contact lenses to be not only more attractive but more beneficial to their eyesight, giving them a full and natural range of vision with no interference from greasy fingerprints, rain, or condensation. If you are considering getting Contact Lenses in Chicago, you will have several types of lenses to choose from.
Hard Lenses
Hard contact lenses are made of a rigid material that can correct astigmatism and other refractive errors. They give users sharper vision than soft lenses do. There are two kinds of hard lenses, conventional polymethyl methacrylate (PMMA) and rigid gas permeable (RGP).
* PMMA lenses are rarely if ever prescribed anymore because they don’t allow oxygen to reach the eye. This can cause serious problems when users wear the lenses for too long. These lenses are cheaper than other types, but also less comfortable.
* RGP lenses are more comfortable to wear and safer because oxygen can penetrate the lens. Some RGPs are specially designed to reshape the eye while worn overnight. These are also called corneal reshaping lenses, and they are prescribed to treat astigmatism and childhood myopia.
Soft Lenses
Soft contact lenses are made of a soft plastic material that is very comfortable to wear but requires more intensive cleaning that hard lenses do. The three kinds of soft lenses are daily wear, extended wear, and disposable.
* Daily-wear lenses have to be taken out every night and cleaned.
* Extended-wear lenses can be worn for several days without being removed, but they should be cleaned every few days in order to avoid eye irritation.
* Disposable lenses can be word non-stop for anywhere from one week to one month, depending on the lens. They were designed to decrease the risk of infection caused by wearers not cleaning lenses frequently enough or keeping them for too long.
With these options to choose from, most people can find a lens that is comfortable and practical. For more information about choosing the right Contact Lenses in Chicago, visit Business Name.
