generally the problems reported with Crystalens do not involve damage to the lens itself but sometimes misplacement of the lens, which can sometimes be corrected with another procedure, and effects such as glare, reflection, and blurry vision.
The power, or prescription of the lens can also be off, either because of errors in measuring the eye before surgery or other previous medical conditions of the eye. This can be corrected by using contacts, glasses or Lasik to further correct the vision.
these seem to be the most reported complications from patients on this board.
Please see the forum entry for multifocal lens implants for extensive information.
Lens implants are not routinely removed as it is a very delicate and risky procedure.