Iol Power

by Hoffer, Kenneth J

• ISBN13: 9781556429880
• ISBN10: 1556429886
• Edition: 1st
• Format: Hardcover
• Copyright: 2011-03-15
• Publisher: Slack Incorporated

Summary

IOL Powerby Kenneth J. Hoffer, MD will be the definitive resource for ophthalmologists who strive to increase the accuracy for multifocal IOLs and overcome the challenges that can come with treating patients that have had laser refractive surgery, such as PRK, LASIK, and LASEK. Inside the pages ofIOL Power, Dr. Hoffer is joined by some of the most respected physicians and physicists in the field of IOL power, together their expertise, spanning over 35 years, makes even the most difficult subjects easy to understand. Some topics include: Ultrasound velocities for axial length measurement IOLMaster in difficult eyes Manual keratometry and instrumentation Regression and theoretic formulas Formula personalization Multifocals and toric IOLs Aspheric IOLs Topography & Scheimpflug corneal powers Chapters Cover: All aspects of obtaining the most accurate biometry Available modern calculation formulas Latest instruments Problems that can arise, how to prevent, and then repair IOL Powerby Kenneth J. Hoffer, MD is structured in a logical manner so as to cover every facet of IOL power from the basics to the most complicated subjects to achieve the most accurate and precise calculations and should be in the hands of all ophthalmic surgeons, technicians, residents and students.

Author Biography

IOL Power by Kenneth J. Hoffer, MD is structured in a logical manner so as to cover every facet of IOL power from the basics to the most complicated subjects to achieve the most accurate and precise calculations and should be in the hands of all ophthalmic surgeons, technicians residents, and students.

Table of Contents

Dedication	p. v
Acknowledgments	p. xi
About the Author	p. xii
Contributing Authors	p. xv
Foreword	p. xix
Foreword	p. xxi
Basics and Accurate Biometry	p. 1
Section I: Introduction	p. 3
Axial Length: Ultrasound: Background	p. 9
Immersion Versus Applanation Ultrasound	p. 13
Ultrasound Velocities for Axial Length Measurement	p. 17
A-Scan Biometry: Immersion Technique	p. 25
A-Scan Biometry: Avoiding Pitfalls With Immersion Technique	p. 29
Available A-Scan Instrumentation	p. 39
Immersion Using the Prager Shell	p. 53
Axial Length: Laser Interferometry: Basics of the IOLMaster	p. 63
IOLMaster Examination	p. 67
IOLMaster in Difficult Eyes	p. 71
Axial Length: Laser Interferometry: The LENSTAR LS900 Instrument	p. 75
Corneal Power: Diopters Versus Radius	p. 89
Corneal Power: Manual Keratometry and Instrumentation	p. 93
Automated Keratometry for IOL Power Calculation	p. 97
Corneal Power: Corneal Topography for IOL Power Calculation	p. 107
Corneal Power: Measuring Corneal Power With the Pentacam	p. 115
IOL Position: ACD and ELP	p. 119
IOL Position: Measuring the ACD by Optical Pachymetry	p. 123
IOL Position: Double-AL Method for Scleral Buckle Eyes	p. 131
Formulas and Special Circumstances	p. 133
Introduction	p. 135
Formulas and Programs: Formula History and Basics	p. 137
Formulas and Programs: Regression and Theoretic Formulas	p. 143
Formulas and Programs: Olsen Formula	p. 149
Formulas and Programs: Accessing Modern IOL Power Formulas	p. 155
Formulas and Programs: Formula Personalization	p. 163
Special Circumstances: AL Measurement in Staphyloma Eyes	p. 167
Special Circumstances: Silicone Oil-Filled Eyes	p. 169
Special Circumstances: Unilateral High Myopes and Hyperopes	p. 171
Special Circumstances: Penetrating Keratoplasty and Scarred Corneas	p. 173
Special Circumstances: Radial Keratotomy Eyes	p. 175
Special Circumstances: Post-Laser Refractive Surgery Eyes	p. 179
Special Circumstances: Haigis-L IOL Formula	p. 195
Special Circumstances: Double-K Method	p. 199
Special Circumstances: Influence of Spherical Aberration on IOL Power	p. 207
Special Circumstances: Multifocals and Toric IOLs	p. 211
Special Circumstances: Pediatric Eyes	p. 215
Special Circumstances: Piggyback IOLs	p. 219
Special Circumstances: Silicone Oil Power	p. 221
Special Circumstances: Effect of IOL Tilt on Astigmatism	p. 223
Special Circumstances: Aniseikonia and Anisometropia	p. 233
Preventing IOL Power Errors	p. 237
Diagnosing and Treating IOL Power Errors	p. 237
Future Directions in IOL Power Calculation: Intraoperative Refractive Biometry	p. 241
IOL Power Club	p. 247
Financial Disclosures	p. 249
Index	p. 251
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