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    Trifocal lens technology improves intermediate vision

    Novel presbyopia-correcting IOL delivers good quality and quantity of vision



    A diffractive trifocal IOL is novel technology that delivers good near, intermediate, and far vision and has other advantages.


    Monza, Italy—Outcomes in patients with a diffractive trifocal IOL (AT LISA tri 839MP and 939MP, Carl Zeiss Meditec) implanted show that the unique optic design provides a full range of good uncorrected vision, said Matteo Piovella, MD.

    “Diffractive multifocal IOLs are generally bifocal lenses that distribute light rays to foci for distance and near and so patients implanted with these IOLs have poor vision at intermediate distances,” said Dr. Piovella, medical director, Centro Microchirurgia Ambulatoriale, Monza, Italy. “In contrast, the trifocal technology improves intermediate vision without compromising vision for near or far.”

    The trifocal technology is also less pupil size dependent, provides better quality of vision by reducing light loss, and minimizes the risk for bothersome night vision symptoms relative to diffractive multifocal IOLs, he added.

    “The trifocal IOL has fewer rings on the optic surface, which reduces the potential for visual disturbances that can be difficult to manage in demanding patients. In addition, it is independent of pupil diameter up to 4.5 mm,” Dr. Piovella said. “Therefore, it provides good quality vision in younger patients who tend to have a larger scotopic pupil.”

    “In my opinion, the trifocal technology IOLs will soon become the market leader, surpassing the current top-selling multifocal IOLs,” he added.

    Cheryl Guttman Krader
    Cheryl Guttman is a medical writer based in Deerfield, Ill.

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