Eyeworld

99 EW REFRACTIVE October 2017 Dr. LiVecchi thinks that pre- testing individuals with multifocal contact lenses is an important step distance vision. The pinhole effect allows only focused light to enter the eye, and with both eyes working together, an individual is able to see both near and far. The principle of the inlay's function is similar to that of the small aperture effect of an f-stop camera, with minimal effect on distance visual acuity but an im- provement in intermediate and near image quality. Dr. LiVecchi pointed out that this correction is not the same as monovision, which corrects one eye for near and one for far, and may not last over time. KAMRA inlays are best implant- ed in eyes with an ideal manifest re- fraction around –1.0 D to maximize efficacy. LASIK can be performed in eyes with stronger myopia to first target emmetropia, followed by insertion of the KAMRA inlay some weeks later or even at the same time in experience hands. Chair time is important with patients considering KAMRA inlays, as with all refractive options, to understand the risks and limitations of surgery and that in order to adjust to binocular vision, neuroadaptation may take some time. The KAMRA is also removable postoperatively if necessary, which for many surgeons and patients is an attractive option. The Flexivue Microlens (Presbia, Dublin, Ireland) creates multifo- cality by using a weakly multifocal corneal inlay. It is a hydrophilic acrylic refractive inlay, 3.2 mm wide, with a 1.6 mm hole in its center, that provides distance vision. The center of the device is plano, with the refractive power of the ring increasing from +1.5 D to +3.5 D toward the periphery, providing near visual correction. As with the KAMRA, the Flexivue is implanted in the non-dominant eye and works best in emmetropic patients. The implant offers something between monovision and mild multifocality, Dr. LiVecchi explained. The third corneal inlay creates multifocality by means of yet anoth- er completely different mechanism. The Raindrop (ReVision Optics, Lake Forest, California) reshapes the cornea, achieving refractive effects much like LASIK in that it also changes the shape of the cornea. Unlike LASIK, however, it is intend- ed only to correct the loss of near vi- sion associated with presbyopia. The plano, 2 mm in diameter, 32 micron thick device is made of hydrogel and is placed in a corneal pocket, causing steepening in the central cornea (profocal cornea) that tapers toward the periphery of the cornea. The result is like that of a multifocal lens. The Raindrop, unlike the KAM- RA and Flexivue, can be implanted bilaterally as well as unilaterally. Visit OASIS ® Medical | AAO Booth #800 FEATHER is registered trademarks of FEATHER, & OASIS names & logos are registered trademarks of OASIS Medical, Inc. 514 S. Vermont Ave, Glendora, CA 91741. LIT-EyeWorldAd Rev0 9/17 NEW: OASISMEDICAL.COM REGISTER TODAY From the company that brought your practice Call to order: 844-820-8940 Request a catalog from: customerservice@oasismedical.com FEATHER ® Ultra-Sharp Slit Keratome Reusable and Disposable – Ref # 0614BUC | P-0614BUC FEATHER ® Controlled Depth Groove Reusable – Ref # 07330G FEATHER ® Stab Incision Reusable, Disposable and Safeshield – Ref # 715 | P-715 | PSS-715 "The deliver of first-rate surgical outcomes is of paramount importance to our team. We constantly strive to produce those outcomes in the most efficient manner possible. Cost containment in our supply chain allows us to conserve out resources and to redirect them where they matter most. This is critical for any ambulatory surgery center to thrive. We use FEATHER ® Reusable Scalpels as one means to achieve these goals. The product is superiorly made and this allows us, along with the proper care, to get the most use from each blade." – Anonymous surgery center (No funding for these statements was provided by OASIS or FEATHER) continued on page 100

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