Discusses the advantages of preparing the lens sac like an envelope for extracapsular cataract extraction with implantation of intraocular lens into the lens sac. Aspiration-irrigation evacuation of the lenticular mass from the equatorial zone of the lens sac is the cardinal moment in endocapsular microsurgery. The authors recommend a common glass syringe with a modified piston for evacuating the lenticular mass. The parameters of the piston groove for the tightening silicon ring pad are changed, which appreciably improves the aspiration characteristics of the syringe and permits effectively and rapidly clear the lens sac "envelope" using just 5-10 ml of irrigation solution.