OCT 2012

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

Issue link: https://digital.eyeworld.org/i/87458

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Page 116 of 168

114 EW MEETING REPORTER October 2012 Reporting live from ESCRS 2012 Milan, Italy XXX Congress continued from page 113 New tools in biometry Claudio Carbonara, M.D., Rome, gave an overview of biometry meas- urement tools. The Nidek AL-Scan (Aichi, Japan) has a large measurement range, from 14 mm to 40 mm, and even measures eyes that have dense cataracts. "It takes 10 seconds for com- plete measurements of one eye," he said. Dr. Carbonara studied scan re- sults from 47 eyes of 25 patients and concluded that there isn't a strong difference between the Nidek and the IOLMaster (Carl Zeiss Meditec). The TopCon Alladin (Oakland, A panel of innovators shared their pearls during a well-attended ESCRS session Source: EyeWorld N.J.) is the only topographer/optical biometer and offers the fastest meas- urements at 7 seconds per eye. Meas- urement range is from 15 mm to 38 mm. The Nidek OPD Scan III takes all of its data with a single measure- ment, including kappa angle, spheri- cal aberration, pupil size, pupil position, HOA topography with APP, SimK, and ECCP. If the kappa angle, which is the difference in millimeters between the visual axis and the pupillary axis, is more than 5 mm, the patient will experience halos, blur, double vision, defocus, astigmatism, and coma. The Holladay IOL Consultant is Sessions at ESCRS were interactive, with audience members asking questions of the panels a keratometer index problem. There is an IOL formula problem when in- correct corneal powers are incor- rectly processed in most IOL power formulas, Prof. Haigis explained. "The cornea power is responsi- ble for all our problems," he said. Radius measurement errors are Editors' note: This Meeting Reporter contains original reporting by the EyeWorld news team from ESCRS 2012, Milan, Italy not a big issue with today's large op- tical zones, and keratometer index errors can be resolved using correc- tion for effective corneal power (e.g., refractive history method, correction exciting new online software that will help give the best IOL calcula- tions for patients, Dr. Carbonara said. Source: EyeWorld functions, etc.). Double-K correc- tions and use of a formula that does- n't have error can help resolve issues with the IOL formula error, Prof. Haigis said. He suggested using the Haigis-L formula, which he devel- oped, after myopic or hyperopic re- fractive laser surgery. Editors' note: Prof. Haigis has financial interests with Carl Zeiss Meditec (Jena, Germany). "It's the most important because it has a complete database of all the IOLs and has every type of calcula- tion," he said. Nidek also has online software, he added. Dr. Carbonara also mentioned EyeNet, which is an iPhone/iPad app IOL calculator as well as the "Bible of biometry" (www.doctor-hill.com). Editors' note: Dr. Carbonara has no fi- nancial interests related to his talk. continued on page 117

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