What is Accommodation (eye)?
[[File:Focus in an eye.svg|thumb|325px|Light from a single point of a distant object and light from a single point of a near object can be seen clearly when the [[wiktionary:curvature|curvature]] of the lens changes.]] '''Accommodation''' is the way the [[eye]] increases [[optical power]] (the degree to which the lens [[wiktionary:converge|converges]] or [[wiktionary:diverge|diverges]] light). This is necessary to produce a clear image ([[Focus (optics)|focus]]) on an object when it draws near the eye. A lens that is more convex( fatter in the middle) would refract more light rays than a less convex lens (thinner lens). The lens can change shape because the cells of the lens contain an elastic [[Crystallinity|crystalline]] [[protein]]. The young human eye can change focus from distance to seven [[centimeter]]s from the eye in 350 [[millisecond]]s. The eye focuses on a given object by changing the shape of the eye lens through accommodation. This is controlled by ciliary [[muscle]],which surrounds the lens. == Other websites == * [http://www.pupileyes.com/index.php?content=accommodation&lang=english pupilEyes - Learn about accommodation of the eye] {{Webarchive|url=https://web.archive.org/web/20110715132050/http://www.pupileyes.com/index.php?content=accommodation&lang=english |date=2011-07-15 }} {{Biology-stub}} [[Category:Optometry]] [[Category:Eye anatomy]]