We use the finite element method to evaluate different capsulotomy tec
hniques. Nucleus expression was simulated in a computer model to visua
lize stress distribution in the anterior capsule. The finite element m
odel demonstrated that the capsulorhexis edge is strong because of low
and uniform stress distribution in the tissue. With can-opener and en
velope capsulotomies, areas of high stress accumulation create the ris
k of tears during surgery.