Eyeworld

JUN 2012

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

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June 2012 Astigmatism Treat the cause. Holos Clarity Medical Systems is currently developing a wavefront aberrometer called Holos that shows what Barry Linder, M.D., chief medical officer, Clarity Medical Systems, describes as a "wavefront movie." "Holos is proprietary wavefront The Callisto Eye computer screen is pictured behind Oliver Findl, M.D. The surgeon sees the overlay in the system's eyepiece Source: Oliver Findl, M.D. and achieve the correct size and shape of capsulorhexis. "This system is nice because it's very precise and it makes the work- flow easier in a busy surgical unit," Dr. Findl said. "It's a very straightfor- ward system." One aspect of the Callisto that Dr. Findl finds valuable is the photo- graph taken of the vessels around the cornea. The photograph is im- ported into the computer, which is connected to the surgical micro- scope, allowing the surgeon to pre- cisely identify these vessels on the live video. The photograph and the video "are actually matched and tracked," Dr. Findl explained. "When I look into the right eyepiece, on top I see an overlay of these axis lines," allowing the surgeon to know which axis is the correct axis. "It's a step toward real virtual surgery," he added. Another feature of interest is the overlay includes a ring for rhexis size and shape guidance. "You can say you want to have a 5 mm diameter ring, and it will be projected onto your live image while you're [creating] the rhexis," he ex- plained. "This will help you guide the rhexis to have a well-centered rhexis of the perfect size. It's a very simple tool. Obviously, you have to do the rhexis yourself, but you have guidance, and that guidance is very helpful." technology that is real time. It's the difference between a movie camera and a still camera," he explained. ". Holos is able to run in real time and process and continuously display wavefront data with refraction." When designing Holos, Clarity focused on creating a system that was straightforward and easy to use, Dr. Linder said. "Our goal was to ensure we didn't ask surgeons to do anything differently," he said. "They don't have to stop the procedure, they don't have to have anyone else doing anything, and they don't have to change their operating distance." Holos is still in development, but a number of cataract surgeons have used the system in a feasibility clinical study. The response was overwhelmingly positive and enthusiastic, Dr. Linder said. "It's small compared to other technologies," he said. "It doesn't interfere at all with passing instru- ments. Everyone who has used it has commented on its ease of use. It's highly intuitive and doesn't disrupt the procedure in any way." Clarity can't comment on when Holos will reach market, but the company does believe the technol- ogy is on the horizon. EW Editors' note: Dr. Linder has financial interests with Clarity Medical Systems. Dr. Zaldivar has financial interests with Tracey Technologies. Ms. Weng has financial interests with SensoMotoric Instruments. Drs. Bafna and Findl have no financial interests related to this article. Contact information Bafna: drbafna@clevelandeyeclinic.com Findl: oliver@findl.at Linder: barry.linder@alum.mit.edu Weng: chen.weng@smi.de Zaldivar: contact Diana Arbet, darbet@institutozaldivar.com LipiFlow® is cleared by the U.S. Food and Drug Adminis- tration and indicated for treatment of Meibomian Gland Dysfunction and evaporative dry eye. Gland secretions more than doubled, on average, following a single LipiFlow® treatment.1 Visit tearscience.com for complete product and safety information. "We're going to see LipiFlow emerge as a new treatment standard for patients with Evaporative Dry Eye." John Hovanesian, MD Harvard Eye Associates Laguna Hills, CA 1 Lane SS, et al. A New System, the LipiFlow, for the treatment of Meibomian Gland Dysfunction (MGD), Cornea 1/4/12 LipiFlow is a registered trademark of TearScience, Inc. Copyright © 2012 TearScience, Inc. All rights reserved.

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