IEEE Richland Sensors Council & LMAG Talk by Prof. Leonard J. Bond - "The Eyes Have It"
"The eyes have it" - the Physics of Cataract Surgery
Leonard J. Bond
Professor Emeritus, Iowa State University
Abstract
Approximately 3.7 million cataract surgeries are performed annually in the United States. Phacoemulsification, a modern technique, is the most common method used for cataract removal in these procedures. Despite its unparalleled success and the common use of phacoemulsification in the field of ophthalmic surgery, the precise mechanism of ultrasonic phacoemulsification for cataract extraction remains controversial. The web and literature report various mechanisms that are said to occur, and there are some “myths,” some of which have been discussed for decades and appear on websites. The types of tools used for cataract tissue fragmentation are also used in ultrasonic assisted liposuction (UAL) and for various surgical procedures, including tumor debulking.
This talk will report various ultrasonic measurements and the results of an investigation of the interaction of ultrasonic tools with materials and the mechanisms that can be seen to occur.
The results show that phacoemulsification is most likely dominated by the direct action of the vibrating tip of the tool used against tissue. The source of the “cavitational hiss,” that has been reported, is clearly identified. The insights given will, hopefully, reduce some of the mystery and mythology that still surrounds the physics of the fundamental interactions, for what is generally a safe and effective, and commonly used, procedure for cataract removal.
Date and Time
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- Richland Public Library
- Richland, Washington
- United States 99352
- Room Number: Conf Room B
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Organized by IEEE Sensors Council - Richland Chapter Section
- Starts 03 September 2025 07:00 AM UTC
- Ends 02 October 2025 07:00 AM UTC
- No Admission Charge
Speakers
Leonard Bond of Iowa State University
Biography:
Dr. Bond graduated with his Ph.D. in Physics, in 1978, from City University London. He has experience as an academic, in industry and national laboratories. Most recently he was a Professor at Iowa State University in both Aerospace and Mechanical Engineering. He retired in 2022 and continues to be active in research as a consultant and as Director of R&D with Sonogen Medical Inc. His previous positions include being a Laboratory Fellow with Pacific Northwest National Laboratory (PNNL), a Research Professor, University of Colorado, Boulder and Reader in Ultrasonics, University College London. He is author of the 4th Edition of the book – Ultrasonics (2024), D. Ensminger and L.J. Bond, CRC/Taylor and Francis.
Dr. Bond is a Fellow of the American Association of the Advancement of Science, a Fellow of the Institute of Physics (UK), and a Senior Member of the IEEE. In recognition of his contribution to ultrasonics and nondestructive evaluation he was appointed as an Honorary Professor Beijing, University of Technology in 2019. In 2009-10 he served as Director IEEE Region 6, and a member of the IEEE Board of Directors. He is currently the Chair of the IEEE Richland Section, Life Member Affinity Group (LMAG). Dr. Bond has been an invited speaker at many national and international meetings. He has been author or co-author for 23 book chapters, 19 books (most as editor), more than 90 peer reviewed journal papers and more than 220 papers in conference proceedings. He holds 10 patents.
Email:
Address:Iowa State University , , Ames, Iowa, United States, 50011