The pupillary membrane was torn by the contraction of the pupillary extensor.The incision was enlarged until the pupillary membrane rolled in the anterior chamber.

• 自上方瞳孔缘作切口，借瞳孔扩大肌收缩力撕破瞳孔膜，扩大切口至瞳孔膜卷缩于前房内。