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Glaucoma implant shows IOP-lowering effect similar to trabeculectomy

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CHICAGO — A miniature glaucoma shunt implanted under a scleral flap is equally successful in lowering IOP as trabeculectomy but has a lower hypotony risk, according to a poster presentation here.

Peter J.G. Maris, MD, and Peter Andreas Netland, MD, PhD, performed a comparative case-control series of 100 eyes, half of which were treated with the ExPress miniature glaucoma shunt from Optonol and the other half with trabeculectomy.

IOP dropped 53.7% in eyes in which the ExPress shunt was implanted under a scleral flap, compared with 53.6% in eyes that underwent trabeculectomy. Hypotony occurred in 6% of the eyes with the implant, compared with 34% of the eyes with trabeculectomy.

“The ExPress implant under a scleral flap had similar IOP-lowering efficacy, with a lower rate of hypotony, compared with trabeculectomy,” the study authors concluded.

The ExPress miniature glaucoma shunt is manufactured by Optonol Ltd. The poster was presented here at the American Academy of Ophthalmology meeting.