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Examples
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A new minimally invasive surgery for glaucoma called canaloplasty is nearly as effective as traditional surgery and has fewer complications, according to a company that sells equipment used in the procedure.
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In canaloplasty, an incision is made in the eye and a thin catheter is inserted into Schlemm's Canal, a tube in the trabecular meshwork.
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In results of a 14-center study presented by Dr. Lewis at the American Academy of Ophthalmology on Nov. 9 in Atlanta, the average eye pressure in about a hundred patients who received canaloplasty was in the normal range two years after the surgery.
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"We don't know how long canaloplasty lasts," adds Arthur Sit, assistant professor of ophthalmology at the Mayo Clinic in Rochester, Minn.
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Moreover, he is concerned that scar tissue left from canaloplasty could make a subsequent trabeculectomy less effective.
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Dr. Lewis says that the location of the canaloplasty incision, off to one side of the eye, leaves plenty of room for a trabeculectomy later.
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Independent eye surgeons say canaloplasty is a worthy option, but not necessarily the best choice for many patients.
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Surgeons agree that canaloplasty is a safer option than the traditional surgery, but some urge caution.
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Two-year data on canaloplasty look promising, but some physicians warn that little is known about its long-term outcome.
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Additional trials are now beginning that will compare canaloplasty to trabeculectomy and to medical therapy alone.
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