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    Experience with a preassembled silicone I/A tip during cataract surgery

    Using a silicone I/A tip system may help to reduce capsular complications


    Expert opinion

    There are several design benefits to the Allegro I/A tip system. During movements that bring us toward the anterior capsule leaflet, it is possible to accidentally apply suction to the wall of the capsule. If the aspiration port is metal or plastic, it may have sharp or uneven edges that can tear or damage the thin wall. This may lead to complications that we want to avoid.

    The Allegro I/A tip provides, in this regard, a much higher level of safety. The aspiration port is soft, smooth and rounded making it highly tissue-friendly. One can use this tip to directly approach the posterior capsule wall without damaging it. It’s an ideal instrument for both beginners and experienced surgeons.

    The unique geometry of this tip features two bends which improve access to the subincisional cortex while minimising torque on the wound. Additionally, the irrigation ports are distally located, which is optimised for working close to the wound.

    While there are other silicone I/A tips available, some require assembly, i.e., it is necessary to install the silicone sleeve over the tip. If the tip is not assembled correctly or the silicone cuff shifts during surgery, there is a risk that the ports will not be totally encased in silicone. In such cases, small burrs that may occur in the metal could make contact with the capsule and risk damaging it.

    The Allegro I/A tip is completely configured for a single use. It is taken from the packaging, bolted with a half twist on the handpiece and is ready for use.


    1. Blomquist PH, Pluenneke AC. Decrease in complications during cataract surgery with the use of a silicone-tipped irrigation / aspiration instrument. J Cataract Refract Surg. 2005;31:1194-1197.


    Dr Christoph Binder

    E: [email protected]

    Dr Christoph Binder is medical director at the clinic Schwarzwaldaugenklinik. He has studied at the Universities of FU Berlin, LMU Munich and at the Ludwig-Maximilians-University Munich, focusing on retinal diseases. Now he specialises in refractive surgery.



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