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Endothelial cell loss in pseudophakic patients receiving a Paul glaucoma drainage device with its tube inserted in the anterior versus posterior chamber: a randomized controlled trial

Primary: to determine the loss of corneal endothelial cells after implantation of a Paul GDD with its tube either anterior or posterior of the iris. Secondary: to compare efficacy and safety of both procedures.

Comparing the Baerveldt and Paul glaucoma drainage devices and their effects on the corneal endothelium

To detemine whether the Paul tube induces less damage to the corneal endothelium than the Baerveldt GDD.