The Ahmed Glaucoma Valve naturally varies its critical flow path dimension with pressure, which provides reduced risk of hypotony at low pressures and increased flow facility at moderate pressures.
…indicated for the management of refractory glaucomas, where previous surgical treatment has failed, or by experience is known not to provide satisfactory results. Such refractory glaucomas can include neovascular glaucoma, primary open angle glaucoma unresponsive to medication, congenital or infantile glaucoma, and refractory glaucomas resulting from aphakia or uveitis.
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