Intraoperative data collection
A single nurse recorded the intraoperative measurements. Accumulated energy dissipated (CDE) data and total balanced saline solution were obtained at the end of each surgery. The Centurion System (Alcon Laboratories, Fort Worth, TX, USA) uses the CDE as a value for phacoemulsification energy, calculated as (longitudinal time × average longitudinal power) + (torsional time × 0.4 × average torsional amplitude) [