Eyeworld

73 EW FEATURE February 2015 IOL calculations outcomes and also require no axial length adjustment for the high to extreme axial myope. By several percentage points, Barrett seems to have the overall advantage, especial- ly for the high to extreme myope and the high hyperope," he said. Both Olsen and Barrett are now part of the LENSTAR EyeSuite software. For those without the LENSTAR, the Barrett Universal II formula can be accessed without charge on the Asia-Pacific Asso- ciation of Cataract & Refractive Surgeons website, www.apacrs.org/ barrett_universal2. In addition to IOL calculation formulas, Dr. Garg relies on intraop- erative aberrometry. "I use the for- mulas and then use intraoperative aberrometry to confirm or change the lens power. The downsides to this are that it takes a couple of extra minutes in the OR, you have to pay for the equipment, and in really difficult eyes, it sometimes doesn't work," Dr. Garg said. For eyes that have undergone previous refractive surgery, specifi- cally LASIK to correct myopia, Dr. Garg uses Haigis L followed by intraoperative aberrometry. "I don't have any experience with the Holladay 2 formula myself, but it has been shown to be a very accurate measurement. These days, I'm relying more and more on in- traoperative aberrometry," Dr. Garg said. He noted that residents at his institution are taught to use multi- ple formulas. Instead of using just one formula, they are encouraged to use multiple formulas on the same eye and look for agreement between formulas. "That's a smart way to look at formulas for any patient. If you look at 3 of them, and 2 of them are in agreement and 1 is way off, try to figure out why the 1 is off. I think it Only the GALILEI G4 unites Placido and Dual Scheimpflug technologies in one measurement. With the GALILEI G4, you get highest precision measurements for posterior and anterior curvature, Pachymetry, ray-traced Total Corneal Power (TCP), ray-traced Total Corneal Wavefront and the full anterior segment of your patient's eye. The new GALILEI G4, for unrivalled clinical results. The GALILEI G4 is a modular platform which can be upgraded according to your needs. Learn more on galilei.ziemergroup.com. FOR REFRACTIVE AND CATARACT SURGERY Reaching a new level in corneal tomography Patented Dual Scheimpflug system provides highly accurate pachymetry and ray-tracing, even when the measurement is decentred. Iris-based eye motion compensation Have confidence in your follow-up measurements with realignment of maps in 3-D. The only true solution Placido and Scheimpflug for highly accurate pachymetry, elevation and curvature data – in all eyes. One platform, one solution. We simplify the daily workflow in your clinic with an all-in-one solution, from refractive to cataract surgery. is always better to err on the side of myopia because it can be corrected with refractive surgery much easier than hyperopia can," Dr. Garg said. EW Global Trends in Ophthalmology ™ Copyright © 2015 Global Trends in Ophthalmology and the American Society of Cataract & Refractive Surgery. All rights reserved. Editors' note: Drs. Garg and Hill have no financial interests related to this article. Contact information Garg: gargs@uci.edu Hill: hill@doctor-hill.com

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