Today, it is estimated that over 100 million people wear contact lenses worldwide. These items are very popular and it is improving every day, the technology makes it even more desirable.
Why do people wear contact lenses?
There are people who wear contact lenses instead of glasses, for aesthetic reasons. You might be better with contact lenses than with glasses. Another reason that people are determined to wear contact lenses, is substantially modified. There are a wide variety of decorative contact lenses as the eye can change its appearance. And there are those who appreciate the convenience of knowing. You can not play some sports with glasses, they use devices that are incompatible with glasses, etc. This group of people who are exposed to wear contact lenses for therapeutic reasons forced. In their case, the contact lens is not an option. Lenses can heal a buffer in the healing of various diseases or injuries to the cornea, and it is a luxury. There is also a combination of these two reasons - the colored glasses with corrective power that many people actually use.
The first contact lenses were developed ever made of glass. Then came new species, as they are Plexiglas and rigid gas permeable, but it is now the soft contact lens to the most popular. Modern materials are silicone hydrogel or other plastic materials such as polymers etalficon A, A galyficon, Senofilcon A (used in the manufacture of Acuvue contact lenses). The rigid gas permeable lenses are the people with dry eyes as these lenses recommended to contain water that may evaporate during use.
If you choose to wear contact lenses, you must first go to an ophthalmologist, regardless of what your reason. The physician who decides what type of contact lenses, best eyes. Several factors for prescribing a particular contact lens must be taken into account: the material (silicone hydrogel is one of the most recent discoveries in the field) and longer gestation periods (daily wear, continuous wear and tear), shape (spherical, toric or multifocal) and much more. According to the contact lens material can be rigid or flexible. The rigid gas permeable or gas-tight can be, but the app is more permeable. It can also produce a new classification on the moisture content must be on the amount of water in the contact lens.
Gestation
A daily contact lenses is safer than the risk of infection is lower than the contact lens in the long term. This type requires no cleaning, and for a single use. It is barren. And also stay away from money for cleaning or storage solutions. On the other hand, allows extended contact lenses, the kind of people wear contacts for a longer period simply allows, while oxygenation (they usually have high oxygen permeability). Some people prefer that their convenience is obvious, but the risk of infection is higher than the type of daily contact with the stagnation of bacteria, dust and so on.
A brand of contact lenses most popular in the world is Acuvue by Johnson & Johnson subsidiary Vistakon Company product. They offer both cosmetic contact lenses and vision. Disposable lens design, so that species that is replaced every two weeks (Acuvue, Acuvue 2 Acuvue 2 colors, Acuvue Oasys Acuvue advanced) or less (1-Day Acuvue). They have also started extensive contact lenses.
Where to buy in order
quality of contact lenses is very important. glasses of low quality can damage the eye, causing irritation or wounding the eyelid or the cornea. Especially the way the lenses must be worn, are clean and are cleaned, because even if they are high quality, they will be paid include different risks. The lenses must be purchased from shops in consultation with a physician. The places where these items are available, as can be found everywhere contact lenses are very popular. Another trend is to buy from an online store. This method can be even cheaper and offer the same quality. You just need the recipe. But be careful and choose only reputable shops. Your health is at stake.