subject: Contact Lenses: Accurate And Corrective Solution For Eyes [print this page] A contact lens are basically a corrective, cosmetic lens usually placed on the cornea of the eye for proper vision. It serves similar to corrective purpose as glasses but are invisible and lightweight. Nowadays many lenses are available with tinted a faint blue to make them more visible when immersed in cleaning and storage solutions. Some cosmetic lenses are deliberately coloured to alter the appearance of the eye. Some lenses now have a thin surface treatment which is a UV coating; this helps to reduce UV damage to the eye's natural lens.
People wear contact lenses for many reasons, often due to their appearance and practicality. When compared with spectacles, contact lenses are less affected by wet weather, do not steam up, and provide a wider field of vision. They are more suitable for a number of sporting activities. contact lenses fall into two categories:
1.soft lenses : that are made from water-containing plastics
2.GP (Gas Permeable) lenses : that are oxygen permeable rigid contact lenses.
Contact lenses may also categories by wearing schedule :
1)Daily wear contacts must be removed, cleaned and stored each night,
2) Extended wear contact lenses are made from materials which are safe for overnight wear. Sometimes continuous wear is used for a type of extended wear lens that can be worn for up to 30 days.
Various contact lens designs are available for different vision problems :-
Bifocal Contact Lenses :- provide clear vision at various distances
Monovision :- might work for you if bifocal contact lenses don't work
Disposable Contact Lenses:- enable a healthier lens-wearing experience
Gas Permeable (GP) Contact Lenses :- for the ultimate in crisp vision
Colored Contact Lenses :- give your eyes a dramatic change
Custom Contact Lenses :- could work for you if other options fail
Orthokeratology Lenses :- enable contact lens-free vision during the day
Prosthetic Contact Lenses :- mask eye injury or disfigurements
Silicone Hydro gel :-Contacts transmit more oxygen to your eyes
Special-Effect Contact Lenses:-used for vampire, Goth, monster and anime looks
Toric Contact Lenses :- provide good vision if you have astigmatism
If you are thinking of switching to contact lenses, would like to have your contact lens prescription updated, or are considering color contacts for cosmetic reasons, you should mention this when you are scheduling an appointment with your eye care specialist
Your contact lenses should do three things:
"properly fit your cornea
"give you clear vision
"provide any "extra" benefits your desire (or require) such as color, the convenience of daily disposal, or multiple powers
