The difficulty of this procedure depends on the situation. Explantation of IOL's can be done fairly easily if it's soon (i.e., within a month or so) after the lens was implanted. It becomes a bit more difficult later, after the capsular bag wraps around he lens, but still doable by an experienced surgion. The procedure becomes much more problematic after a capsulotomy is performed. Many surgeons will not attempt this, although it can be done in the hands of a very skilled and experienced surgeon.