Were the groups in the trabeculectomy versus Ahmed valve study really comparable?

Mahroo, Omar A.; Stanbury, Rosalyn M; Ks, Lim

doi:10.1136/bjo.2009.177998

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Ahmed Glaucoma Valve Versus Trabeculectomy1

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2017

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“…The authors concluded that, when great IOP reduction and low IOP levels are needed, trabeculectomy achieves this goal more frequently. Doubts have been raised about the methodology of this retrospective study and in particular about the difference in visual acuity and IOP between the two groups at baseline (which may suggest that one group had less healthy eyes than the other) [32].…”

Section: Ahmed Glaucoma Valve Versus Trabeculectomymentioning

confidence: 99%

A Review of the Ahmed Glaucoma Valve Implant and Comparison with Other Surgical Operations

et al. 2017

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The Ahmed glaucoma valve (AGV) is a popular glaucoma drainage implant used for the control of intraocular pressure in patients with glaucoma. While in the past AGV implantation was reserved for glaucoma patients poorly controlled after one or more filtration procedures, mounting evidence has recently encouraged its use as a primary surgery in selected cases. AGV has been demonstrated to be safe and effective in reducing intraocular pressure in patients with primary or secondary refractory glaucoma. Compared to other glaucoma surgeries, AGV implantation has shown favorable efficacy and safety. The aim of this article is to review the results of studies directly comparing AGV with other surgical procedures in patients with glaucoma.

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Section: Ahmed Glaucoma Valve Versus Trabeculectomymentioning

confidence: 99%