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    Customized IOL calculator helps cataract surgeons navigate lens choices

    Tool provides choice of computational strategies; ranking criteria selectable by each surgeon


    What surgeons need to know

    These include multiple approaches such as well-tested and openly published formulae (for instance, SRK/T, HofferQ, and Haigis), multiple toric computation paradigms (including fixed and variable toricity ratios), access to an extensive database of IOLs but also allow for a surgeon’s customization, and multiple ranking preferences that minimize sphere error or astigmatism first—or, more global criteria that optimize sphere and cylinder residuals simultaneously.

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    Such a calculator would need to be Internet-accessible and easy to access online, be it on a computer, mobile device, or phone, Dr. Sayegh said.

    The core calculator would need to include IOL power, toric options, ranking, and preferences. The lens database that is part of the system would need to include options from the variety of manufacturers and provide monofocal, aspheric, toric, and multifocal choices.

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    Dr. Sayegh has designed UniversIOL, an IOL calculator that helps meet the challenges outlined.

    He said his calculator is extensive and has a growing universal database of IOL types and IOLs. The calculator also provides a choice of formulae for sphere and toric computation, a choice of computational strategies, and a choice of IOL-ranking criteria that is selectable by each surgeon.

    Dr. Sayegh’s calculator, called UniversIOL, is available at https://www.universiol.com. A demo can be accessed at http://2020eyecenter.com/iol-calculator/.

    More: Why IOL power selection requires ‘different’ thinking


    Samir I. Sayegh, MD, PhD, FACS

    E: [email protected]

    Dr. Sayegh has no financial interest in the subject matter.

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