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Concept: Glaucoma valve


: To compare the intermediate-term intraocular pressure (IOP) control and complication profile of the Ahmed Glaucoma Valve (AGV) implanted posteriorly through the pars plana in eyes undergoing concurrent pars plana vitrectomy (PPV) with device implantation in the anterior chamber (AC) in nonvitrectomized eyes.

Concepts: Intraocular pressure, Glaucoma, Ophthalmology, Vitrectomy, Glaucoma valve


PURPOSE OF REVIEW: This review provides an evidence-based comparison of aqueous shunts in common use. RECENT FINDINGS: Aqueous shunts are being used with increasing frequency in the surgical management of glaucoma. Recent retrospective studies and prospective clinical trials have compared the outcomes of different shunt designs. Larger end-plate size is associated with greater intraocular pressure (IOP) reduction, but there may be an upper limit beyond which a further increase in plate surface area does not contribute beneficially to pressure control. The biocompatibility of plate material may also influence shunt efficacy. The flow restrictor of the Ahmed glaucoma valve provides an added level of safety by reducing the risk of postoperative hypotony, but this implant also appears to have a higher incidence of bleb encapsulation. SUMMARY: Several aqueous shunts are commercially available, and all have been shown to be safe and effective in lowering IOP. Studies comparing aqueous shunts have provided valuable information to assist in surgical decision-making in similar patient groups.

Concepts: Clinical trial, Surgery, Effectiveness, Intraocular pressure, Ophthalmology, Glaucoma valve, Limit superior and limit inferior, Shunt


The purpose of this study was to compare the efficacy and tolerability of the Ahmed glaucoma valve (AGV) implant and the Baerveldt implant for the treatment of refractory glaucoma.

Concepts: Implants, Glaucoma valve, Trabeculectomy


To investigate the influence of trabeculectomy and phacotrabeculectomy on the ocular surface.

Concepts: Surgery, Glaucoma, Ophthalmology, Trabecular meshwork, Glaucoma valve, Trabeculectomy, Glaucoma surgery


To evaluate the efficacy and survival rates of same session ab interno trabeculectomy with the trabectome and Ahmed glaucoma valve implant (AT) in comparison to the Ahmed glaucoma valve alone (A).

Concepts: Glaucoma, Ophthalmology, Trabecular meshwork, Glaucoma valve, Trabeculectomy, Glaucoma surgery


To compare the surgical outcomes of combined phacoemulsification with either Ahmed glaucoma valve (AGV) or Baerveldt glaucoma implant (BGI).

Concepts: Comparison, Surgery, Implants, Ophthalmology, Phacoemulsification, Glaucoma valve, Trabeculectomy


To evaluate the long-term results and complications of Ahmed glaucoma valve (AGV) implantation in a cohort of Egyptian patients.

Concepts: Glaucoma valve, Trabeculectomy


To investigate whether there is any effect of age on bleb morphology and surgical success after trabeculectomy with adjunctive Mitomycin C (MMC).

Concepts: Ophthalmology, Glaucoma valve



To assess the long-term outcomes of GDD exposure repair with corneal lamellar patch graft covered by a buccal mucous membrane graft sutured to surrounding conjunctiva.

Concepts: Mucous membrane, Membrane biology, Glaucoma valve, Buccal mucosa