Contact lenses are thin, curved plastic disks designed to cover the cornea, the clear front covering of the eye. Contacts cling to the film of tears over the cornea because of surface tension. Contacts lenses when used with care and proper supervision provide an effective way to correct vision .They form a very good alternative to eye glasses.visual correction especially in higher degrees of astigmatism.
Contact lenses are used in the treatment of the following just like a plain old eye glass:
Myopia (nearsightedness)
Hyperopia (farsightedness)
Astigmatism (distorted vision)
Presbyopia (need for bifocals)
Special tinted contacts can be used to change the color of the eyes to various degrees. Contact lenses are sometimes used therapeutically in eye diseases where an uneven cornea blurs vision, such as keratoconus or scarring.
