 Nearsightedness, Farsightedness and Astigmatism are the type defects of vision and can be corrected out by using eyeglasses, Lasik or Contact Lenses. Most of Americans use Contact Lenses correct out the vision defect, nearly 20 % people.
Eyeglasses reflect fashion for some people, and some feel good without them. By using Contact Lenses one can achieve such a look. They also help to avoid the refractive surgery. Eyeglass can obstruct the vision angle, but using contact lenses can ease full vision angle with no obstruction which is very helpful in sports.
A decade has been passes away since contact lenses are present. Initially Contact lenses were worn by only few people leaving much of mob using eyeglasses to correct the vision defects. The health consciousness and convenience issues prevented people to use contact lenses. But now the market has lot more advanced variety of Contact lenses.
To get initiated with Contact Lenses, first you need to visit an eye specialist. Once you examined by an eye specialist, you can take the lenses from any eye care professional just like a pharmaceutical. Without the guidance of an eye care professional it is hard for you to determine the correct lenses. Because every individual have different need based on eye structure and usage.
Some of the facts which eye professional may look upon are:
- The usage of the customer.
- Lens design.
- Life of a lens.
- Material used to make the lens.
When we talk about the material it may fall under three categories
- Plexiglas made lens, they are hard and rarely used Contact Lenses.
- Water Containing Plastics made, Mostly used also have bigger in size compared to iris.
- Oxygen porous lenses made of rigid plastics, smaller than iris and moderately used.
Oxygen porous lenses are made of silicone hydrogel. They pass more oxygen trough them so that dehydration state can be avoided. Most the brands manufacture these lenses as they are prescribed by the majority of eye professionals.
|
