A few things about contact lenses
byon 07-07-2012 at 07:02 PM (103 Views)
"These days, it is estimated that a lot more than 100 million folks about the world wear contact lenses. These items are quite well-known and technologies improves them every day producing them even a lot more desirable.
Why do people wear speak to lenses?
There are individuals who wear speak to lenses, instead of glasses, for esthetical reasons. They like themselves better with contact lenses than with glasses. An additional cause that determines people to wear speak to lenses is the cosmetic one. There is a excellent assortment of decorative contact lenses that can alter the eyes appearance. And there are those who appreciate their practical side. They cant play certain sports with glasses they use devices that are incompatible with glasses etc. There is that category of people who are forced to wear speak to lenses for therapeutic factors. In their case, the make contact with lens is not an choice. The get in touch with lens can be a bandage in the healing method of distinct diseases or injuries of the cornea and it is a luxury that heals. There is also a mixture in between the two reasons - colour lenses with correction energy which really please a lot of persons.
The first contact lenses ever made had been created out of glass. Following that, new varieties appeared, as the ones made of Plexiglas and the rigid gas permeable ones, but, these days, the soft make contact with lens is the most appreciated. Modern day materials include silicon hydrogel or other plastic polymers like etalficon A, galyficon A, senofilcon A (utilized in the fabrication of Acuvue make contact with lenses). Rigid gas permeable make contact with lenses are recommended to the persons with dry eyes as these lenses contain no water that could evaporate during the wearing.
If you determine to wear contact lenses, you first have to go to an ophthalmologist, no matter what your reason could be. The doctor will be the a single to determine which kind of make contact with lenses fit your eyes ideal. Different factors will be deemed for the prescription of a certain speak to lens: the material (the silicon hydrogel is one of the newest discoveries in the field), the wearing time (every day wear, extended wear or continuous wear), the shape (spherical, toric or multifocal) and many more. Depending of the material, the make contact with lens can be either rigid or soft. The rigid one can be gas-tight or gas-permeable, but the soft one particular is always gas-permeable. There can also be a further classification created on the moisture content, on the amount of water in the speak to lens.
The wearing time
A daily contact lens is safer as the danger of infection is lower than at the lengthy term get in touch with lens. This type does not require cleaning, being single-use only. It is sterile. And it even keeps you away from spending cash on cleaning or storage solutions. On the other hand, the extended wear type of contact lenses permits people to very easily wear contacts for a longer period although allowing oxygenation (they generally have a high oxygen permeability rate). Some folks choose them as their convenience is obvious, but the risk of infection is higher than at the everyday type of get in touch with lenses due to the bacterial stagnation, dust accumulation and so on.
One of the most well-liked speak to lenses brand in the world is Acuvue, developed by Johnson & Johnsons subsidiary Vistakon Firm. They provide both vision and esthetical contact lenses. They design disposable lenses, making types that are to be replaced every single two weeks (Acuvue, Acuvue 2, Acuvue 2 Colors, Acuvue Advanced and Acuvue Oasys) or less (1-Day Acuvue). Theyve also began making extended wear lenses.
Where to acquire them from
Speak to lens high quality is quite important. Low-high quality get in touch with lenses can damage the eye, causing irritations or hurting the eyelid or the cornea. Attention should be paid to the way the lenses are worn, kept and cleaned because, even if they are high-quality, they present diverse risks. So, the contact lenses need to be bought from specialised stores right after consulting a doctor. Places where these items are available can be located anywhere as the speak to lenses are very well-liked. Another tendency is to acquire them from an on-line shop. This method can even be less pricey and still offer the identical quality. You just require the prescription. But be careful and only choose respected stores. Your well being is at stake. colour contacts"