phacodonesis

Phacodonesis ({{IPAc-en|'|f|æ|k|oʊ|.|d|oʊ|'|n|iː|s|ɪ|s}}; {{etymology|grc|φακός (phakos)|lens||δονέω (doneo)|to shake}}) is the tremulousness or vibration of the lens with eye movement.{{cite web|title=Phacodonesis|url=http://www.free-medical-dictionary.net/phacodonesis.html|publisher=Medical Dictionary|accessdate=July 21, 2012}} This is often due to lens subluxation, the incomplete or partial dislocation of the lens, caused by an injury to the eye in which some or most of the zonular fibers are broken.{{cite web|title=Phacodonesis|url=http://medical-dictionary.thefreedictionary.com/phacodonesis|publisher=The Free Dictionary|accessdate=July 21, 2012}}