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Torsional ultrasound using the INFINITI? Vision System with the OZil? Torsional handpiece (Alcon Laboratories) is a unique modality that changes the dynamics of ultrasonic phacoemulsification. Compared with traditional longitudinal ultrasound, torsional ultrasound is a fundamentally different approach to phacoemulsification because the side-to-side ultrasonic oscillations shear lens material. Many cataract surgeons have quickly adopted this new modality based on the positive experiences reported by users, including significantly reduced repulsion, improved material followability, improved efficiency of lens removal, and an improved thermal profile; all contributing to improved clinical outcomes.