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Glaucoma affects 2–3 millions of Americans and is a leading cause of blindness.1 The only proven intervention to slow disease progression is to reduce the intraocular pressure which can be done with medications, lasers and surgery.1 Glaucoma drainage implants (GDI) are useful adjuncts in surgical management.2 Several types of implants are currently available and vary in surface area, shape, material composition, and presence or absence of a flow-restricting valve. GDIs may be placed in the anterior chamber, ciliary sulcus or pars plana.3 The location of the tube is determined by the surgeon and often depends on several factors. Visibility of the anterior chamber tube is one clear advantage over a posteriorly placed tube. However, tube erosion and extrusion as well as corneal decompensation are presumably less common in a sulcus and …
Contributors All authors were involved in the design, writing and editing of the manuscript.
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.