Cataract extraction with implantation of an anterior chamber lens was performed in 83 patients (118 eyes). In 3 patients occurred an intraoperative breaking up of the anterior limiting vitreous membrane. It had no influence on the early or late localization of the implanted lens. In the postoperative course one could observe the breaking up of the anterior limiting vitreous membrane in 1 case only; the vitreous pucker caused a delicate deflection of the implanted lens without causing any deterioration of the visual acuity.