2020–2021 BCSC Basic and Clinical Science Course™
11 Lens and Cataract
Chapter 8: Phacoemulsification for Cataract Extraction
This chapter includes related videos. Go to www.aao.org/bcscvideo_section11 or scan the QR codes in the text to access this content.
Two main types of aspiration pumps are used in phacoemulsification machines: flow pumps (eg, a peristaltic pump) and vacuum pumps (eg, a Venturi pump). Flow pumps allow the surgeon to directly control aspiration flow rate and set a vacuum limit. Vacuum pumps allow direct control of the vacuum level only.
Phacoemulsification uses ultrasound energy to emulsify a lens. Modes such as pulse and burst allow for intermittent rather than continuous delivery of phacoemulsification power, thereby decreasing the total amount of energy required for cataract extraction.
Femtosecond laser platforms provide an alternative technology to assist in cataract extraction.
Studies demonstrate that more than 90% of eyes achieved a postoperative spherical equivalent within 1.00 diopters (D) of that predicted by preoperative biometry.
Excerpted from BCSC 2020-2021 series: Section 11 - Lens and Cataract. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.