Duke University
This is a research study to find out if removing the ripcord from a glaucoma drainage device more than 3 months after it has been placed has any effect on intraocular pressure. Participation in research studies is voluntary. The ripcord will be removed at a routine glaucoma care visit and intraocular pressure will be measured before removal, 30 minutes following, and at 1 week, 6 weeks and 3-month intervals during regular clinic visits.
Inclusion Criteria: * Age \> 18 years * Placement of Ahmed Clear Path or Baervelt drainage device with ripcord \> 3 months * Diagnosis of Glaucoma, under active management at Duke Eye Center Glaucoma Clinic * Ripcord suture still in place and accessible for removal * Able to provide written informed consent * IOP \> 10 mm Hg Exclusion Criteria: * Active ocular infection or conjunctivitis in either eye * Inability to undergo ripcord removal procedure * Scheduled for further glaucoma surgery
Patients who have had a ripcord in place for greater than 3 months postoperatively will undergo ripcord removal in the office.
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