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How Do Contact Lenses Work?
Contact lenses rest on your cornea atop a relentless provide of tears. The contacts are also held in place by pressure exerted from the eyelids. When you blink the pressure from the eyelids cause the contacts to move slightly and glide over your cornea. This allows the tears underneath to gently flush out trash or particles that may have accumulated in your eye.
This is just how the contact stays on the eye and is able to provide a way to appropriate vision. The way the vision is corrected is a distinct story altogether.
Contact lenses are prescribed to a wide variety of people who've vision problems related with astigmatism, nearsightedness, farsightedness, and presbyopia. The retinas of individuals who suffer from these conditions cannot properly focus light. When the retina does not function properly and/or doesn't properly focus light then the result is imperfect and blurry vision.
Contact lenses are made in another way relying on the eye condition they're trying to correct. For instance, in the event you undergo from astigmatism your optometrist will measure your cornea so a contact will be made exactly to fit your eye. By doing this a contact is made that can fit your eye perfectly and direct light rays to at least one place on the cornea, which in flip corrects your vision.
These affected by myopia, also known as nearsightedness, will wear lenses which are thinner in the center and thicker on the edges. This design allows the light rays to be processed appropriately by the retina.
Farsightedness sufferers are prescribed just the opposite contact lens, but with the same end result. They allow the retina to process light correctly as well, resulting in corrected vision for the wearer.
All contact lenses use the essential technology to appropriate vision for the wearer. They redirect light to the retina so it is processed correctly. The only distinction is contacts are made in another way to treat completely different eye problems.
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