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    New laser system simplifies astigmatism correction

    State-of-the-art software increases efficiency, accuracy


    “That will be a nice option because we know from work by Doug Koch, MD, and colleagues that the amount of posterior corneal astigmatism can influence outcomes of our astigmatic correction procedures,” Dr. Jackson said. “Currently, in cases where I expect the posterior corneal astigmatism is impacting the total astigmatism, I will adjust my current built-in nomogram accordingly.”

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    Regardless of which system surgeons use to obtain their preoperative diagnostics information for astigmatic correction, Dr. Jackson emphasized the importance of optimizing the condition of the ocular surface to assure quality data.

    “Garbage in, equals garbage out,” Dr. Jackson said, adding that he likes to look for agreement between measurements obtained with several different devices.

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    The Cassini also captures an undilated image of the iris that will be used intraoperatively for iris registration, and the software confirms its compatibility in terms of proper focus and absence of any lid obstruction.

    “Eliminating the need for corneal ink markings to identify the steep axis is now possible with the iris registration capability of Streamline,” Dr. Jackson said.

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    The diagnostic information is used to guide built-in nomograms for astigmatic correction. Surgeons will need to choose a reliable nomogram from another source when they are first starting to perform femtosecond laser astigmatic incisions. Widely used options for the LENSAR are those developed by Dr. Jackson, Jonathan Solomon, MD, and Rob Weinstock, MD.

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