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How Do Contact Lenses Work? |
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In the present times, a number of people use contact lenses. Very few people actually know how contact lenses work. This is what we will discuss in this article.
The contact lenses rest on the top of the cornea. The lenses are held securely on to the eye with the help of the pressure that is exerted by the eyelids. When the eyes are blinked, the pressure from the eyelids causes the lenses to move a little bit and glides over the cornea. This entire process helps the moist environment in the eyes to gently flush out any minute particles.
This is the way how the contact lenses stay on your eye and provide a correct vision to the eye. How exactly the contact lenses provide a better vision to the eye is an altogether different story.
A number of people use contact lenses for different purposes. People suffering from nearsightedness, astigmatism, farsightedness or presbyopia can use contact lenses. Visual defects can usually be traced to some or the other defect in the retina of the eye. The retinas are not able to focus light properly. When this happens, the result is usually a blurry vision.
Contact lenses are different for people suffering from different eyes troubles. Depending upon the eye condition, there are different contacts. For example, if a person is suffering from astigmatism, the optometrist measures the cornea for the lens to be made of the precise size. This way, a contact lens is made so as to fit perfectly to the person’s eye. This directs the light rays to one place on your cornea.
Another example is of people who suffer from myopia. They have to wear a special contact lens to correct their vision. These lenses are thin from the middle and thicker on the edges. This special design allows the light to be processed in the correct way by the retina of the eye.
On the other hand, the people who suffer from farsightedness have to wear lenses that are thick in the middle and thin at the edges. Thus, it can be concluded that basic science is used to correct the vision of a person through contact lenses. The contact lens may be constructed to different specifications, depending purely upon the nature of the visual defect.
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