The contact lens can shift on the part of both fruitful to fashion and vision reasons. Glasses also known as contact corrective, cosmetic and therapeutic purposes. In 1508, Leonardo da Vinci made a sketch of his idea in the first contact. After almost 3 centuries are made and used. However Otto Wycherley, a Czech chemist credited with making modern contact lenses and used the gel.
The main use of corrective lenses for the purposes at the same time, with light and almost invisible, it is easier to bear. Some types of lenses are treated with UV coating to continue protecting the eyes from harmful ultraviolet rays helps the shot by Sun No medical use, is also popular among young people, because their fashion quotient reformatory. Now available lenses are meant for altering the color appearance of the eyes. Besides lenses often provide better results in certain ophthalmic diseases such as keratinous Konia anise and not properly cured with glasses.
However, some types of lenses available. Details are provided to encourage you to have enough knowledge about the lenses. General branch of lenses notified below:
Soft contact lenses: soft type is made of a soft plastic polymer that can absorb 30-80 percent of water. Water in soft plastic that allows oxygen to the cornea. Soft contact lenses may absorb pollutants and therefore it is an issue, either. On the basis of two types can wear daily disposables that can be worn for a day, specially designed for the eyes and hypo-allergenic silicone extended wear disposables can be worn for up to 30 days. Other types of soft contact lenses have variations in color.
Gas-permeable hard lenses: the species is more hard than too soft and durable. It is usually made of silicone polymers, allowing oxygen to the cornea. They are extremely durable and hard types can be worn night.
Bifocal lenses: bifocal lenses are framed to provide better performance in ophthalmic diseases such as presbyopia. Treat presbyopia, bifocals and release the same design is effective and can do both soft and hard gas permeable lenses.
Toric lenses: Toric lenses are specially made for patients with astigmatism. The lenses have two powers, one for the astigmatism at the other for near or far sighted.
Curved lenses to correct k: k correct or orthokeratology cornea is a restructuring treatment. Hard gas-permeable lenses are special design cornea in a perfect shape, and thus to correct vision.
You may visit vorur.herbalife.is