Modified Scleral Tunnel to Prevent Tube Exposure in Patients With Refractory Glaucoma

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To present and evaluate modified scleral tunnel in prevention of tube exposure following Ahmed valve implantation in refractory glaucoma.


In the Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine, a retrospective study was conducted in 36 eyes of 34 patients who were diagnosed with refractory glaucoma and underwent Ahmed glaucoma valve implantation. In the surgery, the modified scleral tunnel was done to prevent tube exposure.


At the end of follow-up (mean 21.68±9.25 mo), there was no conjunctival tube exposure in all 36 eyes. The mean intraocular pressure was 18.3±6.79 mmHg, and 8 eyes needed 1 to 3 types of drugs to decrease intraocular pressure.


The modified scleral tunnel technique in Ahmed glaucoma valve implantation is able to prevent conjunctival tube exposure in the patients with refractory glaucoma.

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