Editing Refraction (section)

== In eye care ==
In [[medicine]], particularly [[optometry]], [[ophthalmology]] and [[orthoptics]], ''refraction'' (also known as ''refractometry'') is a clinical test in which a [[phoropter]] may be used by the appropriate [[eye care professional]] to determine the eye's [[refractive error]] and the best [[corrective lens]]es to be prescribed. A series of test lenses in graded [[optical power]]s or [[focal length]]s are presented to determine which provides the sharpest, clearest vision.<ref>{{cite web|url=http://www.eyeglossary.net/#R|title=Refraction|work=eyeglossary.net|url-status=dead|archive-url=https://web.archive.org/web/20060526054235/http://www.eyeglossary.net/#R|archive-date=2006-05-26|access-date=2006-05-23}}</ref>
[[Refractive surgery]] is a medical procedure to treat common vision disorders.