Traumatic fracture of a Choyce-style anterior chamber lens.

Accidental blunt trauma to a pseudophakic eye fractured the Choyce-style lens which had been implanted 11 months previously. This lens was removed, and its fracture was examined microscopically and duplicated experimentally using a torque-loading force and a shock-loading force. The nature and occurrence of lens fracture in situ depends on the direction of trauma.