Contact lenses relaxation on your cornea atop a relentless supply of tears. The contacts are additionally held in place by pressure exerted from the eyelids. While you blink the pressure from the eyelids cause the contacts to move slightly and glide over your cornea. This allows the tears underneath to softly flush out trash or debris that will have collected 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 different 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 people who suffer from these conditions can not properly focus light. When the retina doesn’t operate properly and/or doesn’t properly focus light then the result’s imperfect and blurry vision.
Contact lenses are made otherwise relying on the eye condition they are making an attempt to correct. As an example, should you endure from astigmatism your optometrist will measure your cornea so a contact could be made precisely to fit your eye. By doing this a contact is made that may fit your eye perfectly and direct light rays to one place on the cornea, which in turn corrects your vision.
These affected by myopia, additionally known as nearsightedness, will wear lenses that are thinner within the center and thicker on the edges. This design permits the light rays to be processed correctly by the retina.
Farsightedness victims are prescribed just the opposite contact lens, but with the identical end result. They permit the retina to process light correctly as well, leading to corrected vision for the wearer.
All contact lenses use the fundamental technology to appropriate vision for the wearer. They redirect light to the retina so it is processed correctly. The only difference is contacts are made differently to deal with totally different eye problems.
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