NOV 2013

EyeWorld is the official news magazine of the American Society of Cataract & Refractive Surgery.

Issue link: https://digital.eyeworld.org/i/220233

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November 2013 December 2011 May 2013 EW NEWS & OPINION 11 ASCRS update ASCRS launches new website by Cindy Sebrell ASCRS•ASOA Director of Marketing and Communications In the journal … November 2013 IOL calculation after refractive surgery Eun Chul Kim, MD, Kyongjin Cho, MD, Ho Sik Hwang, MD, Kyu Yeon Hwang, MD, Man Soo Kim, MD When prior refractive surgery patients need cataract surgery, determining the right lens power can be difficult when clinical history is not available. In a recent study, investigators compared how the use of different keratometry (K) values after myopic refractive surgery affected results of various IOL calculation methods. Investigators used the SRK/T formula with true net power and the equivalent K using the Pentacam Scheimpflug system (Oculus, Arlington, Wash.), as well as the Haigis-L method, to determine IOL power. Then, the Orbscan II scanning slit topographer (Bausch + Lomb, Rochester, N.Y.) and the keratometer of the IOLMaster (Carl Zeiss Meditec, Jena, Germany) partial coherence interferometer (PCI) were used to find the simulated K. Included were both the 2.0 mm zone simulated K total mean power maps and 4.0 mm zone total optical power maps. Investigators found that the Haigis-L, the SRK/T true net power formula, 2 mm total mean power maps, and 4 mm total optical power maps showed significantly lower prediction error and lower absolute prediction error than did equivalent K, simulated K, and PCI K. Of these, the Haigis-L method had the highest percentages of all the methods of correct refraction predictions within .5 D. Investigators concluded that use of the Haigis-L in conjunction with the PCI measurement was the most predictable method for IOL calculation in cases involving prior refractive surgery patients with unavailable history. Also relatively predictable, they determined, was use of the simulated Ks from 2.0 mm zone total mean power maps and true net power in the Scheimpflug system. Diffractive multifocal hydrophobic acrylic IOL Hiroko Bissen-Miyajima, MD, Keiichiro Minami, PhD, Mami Yoshino, MD, Yoko Taira, MD In this retrospective comparative case series, investigators considered what happened to diffractive multifocal IOLs' visual function and light scattering over time. At the six-year mark, investigators evaluated 20 eyes implanted with the AcrySof ReSTOR SA60D3 (Alcon, Fort Worth, Texas), a diffractive multifocal IOL. These were compared with 16 eyes with the monofocal AcrySof SA60AT. Investigators found that there was no significant differences between the groups, which both had light scattering of more than 100 computer compatible tape units. They determined that for those receiving the diffractive multifocal lens, mean corrected distance visual acuity was –0.06 D and mean near vision was –0.04 D. Investigators pointed out, however, that at six years there was a decrease in corrected distance near vision in both groups compared to year one and also a decrease in distance vision for the monofocal control group. Meanwhile, changes in corrected visual acuities in either group were not shown to have any significant correlation with the surface light scattering. They concluded that there was comparable visual function with the diffractive and monofocal IOL at six years postoperatively despite a significant increase in surface light scattering. Review/update: Femtosecond laser assisted-cataract surgery Kendall E. Donaldson, MD, Rosa Braga-Mele, MD, Florence Cabot, MD, Richard Davidson, MD, Deepinder K. Dhaliwal, MD, Rex Hamilton, MD, Mitchell Jackson, MD, Larry Patterson, MD, Karl Stonecipher, MD, Sonia Yoo, MD, for the ASCRS Refractive Cataract Surgery Subcommittee One new option to help cataract surgeons boost outcomes and safety is the use of femtosecond laser-assisted cataract surgery. Investigators considered four different laser platforms that have been brought to the market over the past two years. They highlighted how the use of this technology has changed over time. In addition to describing these laser platforms, they considered what's involved in incorporating this into a practice, including necessary changes in cataract technique as well as logistics. A SCRS is gearing up to celebrate 40 years of supporting innovation in anterior segment eye surgery. From its founding in 1974, ASCRS has always made looking forward a priority. So it only seems fitting that we begin our 40th year with the launch of a comprehensive new website, backed by the latest technology and developed to take advantage of the latest trends in information transfer and online learning. An enterprise-wide project, the website planning process began in mid-2012. A staff and consultant team were assembled and charged with developing ways to provide a better user experience for members and the thousands of worldwide information-seekers who interact in some capacity with ASCRS. The plan was to ensure that everything an anterior segment surgeon might need could be found on the homepage or within one click. Bringing it all together involved updating the search continued on page 12 PLAN AHEAD FOR NEXT YEAR YEAR HOUSI NG IS NOW OPE N HOUSING NOW OPEN www.WinterUpdate.org www.WinterUpdate.org 2014 2014 APRIL 25–29 APRIL 25–29 BOSTON www.AS C R S.org www.ASCRS.org

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