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Refractive error
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==Cost== The yearly cost of correcting refractive errors is estimated at 3.9 to 7.2 billion dollars in the United States.<ref name=Kuryan>{{cite journal |vauthors=Kuryan J, Cheema A, Chuck RS |title= Laser-assisted subepithelial keratectomy (LASEK) versus laser-assisted in-situ keratomileusis (LASIK) for correcting myopia |journal=Cochrane Database Syst Rev|volume=2017|pages= CD011080 |date=2017 |issue= 2 |pmid= 28197998 |doi= 10.1002/14651858.CD011080.pub2 |pmc=5408355}}</ref> {{Clear}}
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