Bifocal contact lenses

I've been able to enjoy a well-designed fashionable reading glasses are now selling a lot, even if recently to presbyopia.
On the other hand, I could also items that can be presbyopia correction without causing any change in appearance.
Frankly, it is a "contact lens".

Similarly glasses, I have also evolved contact lenses.
Referred to as "contact lenses bifocal" contact lenses for the correction of presbyopia.
As with ordinary contacts, bifocal contact lenses, there are soft and hard.
Is characterized by the mechanism of the lens as well as with glasses bifocal contact lenses are made of multiple layers.
The multi-layer structure, it can be seen both perspective.

A typical type of lens is two, there is a type "view change" and "simultaneous vision type."
Simultaneous view type is one that is based on the visual function of the brain.
According to the distance or you see or you see near the brain, switch the view is of this type.
Change view type is selected depending on distance lens.
The other two types, there are two types of bifocal perspective that time is divided clearly, even multi-focal lens type to change the degree of outward gradually from the center of the lens.
Most type alternative vision, hard lenses, soft lenses all have become simultaneous view type.

Bifocal contact lenses are usually dealing with if a major manufacturer.
Such as Bausch & Lomb, CIBA Vision Menicon Roth, and Johnson & Johnson, as well as normal contact lenses, disposable is popular.
Because some of the high oxygen permeability, which is also considered eye health, have been wearing for a long time in peace.
In "Love City" leading contact lens retailer, you can buy it in the same way as normal contact lenses.
Because as much as those prices also common, it is not just because it is expensive presbyopia correction.