How Do Contact Lenses Work?
Contact lenses relaxation on your cornea atop a constant supply of tears. The contacts are additionally held in place by pressure exerted from the eyelids. If 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 accrued in your eye.
This is just how the contact stays on the eye and is able to provide a way to correct vision. The way the vision is corrected is a distinct story altogether.
Contact lenses are prescribed to a wide number of people who've vision problems associated with astigmatism, nearsightedness, farsightedness, and presbyopia. The retinas of individuals who are suffering from these conditions can't properly focus light. When the retina doesn't perform properly and/or does not 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. As an illustration, for those who endure from astigmatism your optometrist will measure your cornea so a contact might be made exactly to fit your eye. By doing this a contact is made that may fit your eye completely and direct light rays to at least one place on the cornea, which in flip corrects your vision.
Those suffering from myopia, also known as nearsightedness, will wear lenses that are thinner within the center and thicker on the edges. This design allows the light rays to be processed accurately by the retina.
Farsightedness victims are prescribed just the opposite contact lens, but with the identical finish result. They allow the retina to process light correctly as well, leading to corrected vision for the wearer.
All contact lenses use the fundamental technology to right vision for the wearer. They redirect light to the retina so it is processed correctly. The only difference is contacts are made in another way to deal with totally different eye problems.
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