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    Glaucoma drainage devices: Location, location, location

    Proper tube placement can reduce major complications


    “Tube erosion tends to occur where the lid margin crosses the sclera. Routing the tube more superiorly and utilizing a long scleral tunnel may help avoid erosions,” he said.

    The technique he uses involves entering the eye at the 12 o’clock position and creating a tunnel about 4 mm long. To do this, he uses a 23-gauge needle, routes it into the anterior chamber parallel to the iris, and then directs the tube through the tunnel.

    “By doing this, friction from an elevated tube is greatly reduced and the patch graft can possibly be eliminated,” he emphasized.

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