Contact lenses are an ideal choice for almost anyone who necessitates vision correction as well as those who don’t want to make use of eyeglasses all the time or go through LASIK surgery. And with the numerous developments done to improve them, many are now switching to contact lenses as they find it more beneficial.
Wherever you kjøpe kontaktlinser, or whether you are new to contact lenses or not, it is important to learn the basics of contact lenses, the material used, design and the features they offer. In doing so, you’d have a better understanding of what they are and how they work and decide on the best contact for you as you discuss it with your eye doctor.
Below are the fundamentals of contact lenses that you ought to know prior to visiting your eye doctor regarding contact lens use:
Contact Lens Basics
When considering the use of contact lenses, you have to know which material would satisfy or fulfill your contact lens needs best.
- Soft Contact Lenses are created from hydrogels. These are water-containing, gel-like plastics. These types of lenses are quite thin, flexible and follow the eye’s front surface. Hydrogel lenses, which was initially presented in the early 1970s, made contact lenses very popular since they are usually instantly comfortable. The only other option back then were hard lenses fashioned from PMMA plastic, which normally took a couple of weeks to adjust to and many weren’t successful at wearing them. Although PMMA contacts have outstanding optics, they don’t allow oxygen to the eye.
- Silicone Hydrogel Contact Lenses are a more developed kind soft lenses which are extra porous compared to standard hydrogel contact lenses and even lets in more oxygen to go to the cornea. These lenses were presented in 2002 and are now the most prevalent kind of lenses prescribed and recommended by eye doctors in the United States.
- Gas Permeable Lenses (GP or RGP) are stiff lenses that are comparable to PMMA contact lens but are more porous permitting oxygen to go through. Since they are porous to oxygen, they could fit nearer to the eye unlike PMMA lenses, which makes them more comfortable to wear. RGP lenses have basically taken the place of PMMA lens since they were released in 1978. They often give a sharper vision compared to soft contacts and silicone hydrogel lenses, particularly with astigmatism. For first time wearers, it typically takes a while for your eyes to adapt to GP lenses, however after this preliminary adjustment period, most wearers find GP contacts comfortable in the same way as hydrogel lenses are comfortable.
- Hybrid Contact Lenses are made to offer wearing comfort as soft and silicone hydrogel contact provide, along with the extremely clear optics by GP lenses. Hybrid contact lenses have a firm GP central region, bordered by a “skirt” of silicone hydrogel of hydrogel. Even with these features, merely a little percentage of the popoluce in the U.S. choose to wear hybrid contacts, maybe since these contacts are difficult to put on as well as more costly to replace compared to soft contacts and silicone hydrogel lenses.