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    Novel design for pupil dilation device expands realm of surgical options

    Concept for next-generation device enables insertion through smaller incisions, use with more procedures



    A novel device for pupil dilation offers several advantages over current devices, including the ability to be inserted through smaller sizes and lesser numbers of incisions in procedures, noted its inventor.


    A novel device for pupil dilation can expand the pupil wiht a single 20-gauge (0.9 mm) incision and no sideports, according to Suven Bhattacharjee, MS, DO, DNB, FRF. (Video courtesy of Suven Bhattacharjee, MS, DO, DNB, FRF)

    Kolkata, India—A novel device for pupil dilation (Bhattacharjee pupil expansion ring)—which can be inserted and removed through a 0.9-mm incision—is easier and faster to use and is safer than existing devices, according to its inventor.

    “I had the impression that the Malyugin ring could be improved upon for our present-day needs because it has a biplanar design,” said Suven Bhattacharjee, MS, DO, DNB, FRF, an ophthalmologist from Kolkata, India. “I started working on a design that would be simpler and could be inserted through a much smaller incision.”

    He also wanted a ring that would not snag on the incision.

    Both the square and hexagonal designs of this new single-plane device effectively dilate the pupil for phacoemulsification. The hexagonal model, however, is preferred for small eyes and is less likely to cause injury to the cornea, iris, angle, and sphincter, according to Dr. Bhattacharjee.

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