Phacodonesis
Phacodonesis (; from Ancient Greek  φακός (phakos) lens, and  δονέω (doneo) to shake) is the tremulousness or vibration of the lens with eye movement. 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.

See also
Iridodonesis

References
External links
An example of phacodonesis on YouTube