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Answer:
Phakic intraocular lenses, or phakic lenses, are lenses made of plastic or silicone that are implanted into the eye permanently to reduce a person's need for glasses or contact lenses. Phakic refers to the fact that the lens is implanted into the eye without removing the eye's natural lens.
During phakic lens implantation surgery, a small incision is made in the front of the eye. The phakic lens is inserted through the incision and placed just in front of or just behind the iris.
Phakic lenses are used to correct refractive errors, or errors in the eye's focusing power. Currently all approved phakic lenses are for correction of nearsightedness (myopia).
For more on phakic lenses, see http://www.fda.gov/cdrh/phakic/.
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