Saturday, April 28, 2007

Contact Lenses Types

Today, contact lenses are small thin plastic disks designed to correct vision by changing the way the light enters the eye by altering the curvature of the cornea. The contact lens covers both the iris (colored portion of the eye) and the pupil (the dark center of the eye). Contact lenses correct mostly Myopia (nearsightedness), Hyperopia (farsightedness), Astigmatism (irregular shape of the cornea, causing skewed vision), and Presbyopia (caused by natural aging of the eye). Contact lenses are about the size of a button and are held in place on the eye by the eyes own natural tears.
Perfect and clear vision occurs when light entering the eyes through the cornea and converge at an exact point on the retina, or the back of the eyeball. Only about 4 in 10 people have this vision. Due to eye and cornea shape, size and distances, it may be necessary for vision to be corrected through the use of lenses.
Spherical and Aspherical Contact Lenses, Toric Contact Lenses, Bifocal Contact Lenses are the common types of contact lenses.
For more information in depth on contact lenses, click HERE to visit our website.

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