Comparison of fluid flow between bimanual and coaxial phacoemulsification using computational fluid dynamics

Abstract

Background: To describe the fluid flow in the chamber of the eye during bimanual and coaxial phacoemulsification using computational fluid dynamics. Methods: Based on the human eye, a computerized eye model was developed. The fluid flow was modeled using the Navier–Stokes formula, turbulence modeling, and Boolean operations numerically. Several parameters of the flow field were evaluated and compared for both phacoemulsification methods. Results: Bimanual cataract surgery produced better followability than coaxial cataract surgery. However, bimanual cataract surgery increased the probability of posterior capsule fluctuation and chamber collapse. Conclusions: Bimanual phacoemulsification improves followability; however, it also increases the probability of posterior capsule rupture and chamber collapse. These findings suggest that there are both advantages and disadvantages to consider when using bimanual phacoemulsification. Keywords: Bimanual phacoemulsification; Coaxial phacoemulsification; Computational fluid dynamics; Followability; Posterior capsule rupture; Chamber collapse.