PURPOSE The Ahmed glaucoma valve (AGV) implant is designed to prevent early postoperative hypotony. There is evidence of variation in hypotony rates in clinical trials which may be due to surgical technique variation, entry site leakage or valve defects from 'over priming'. We describe a simple preimplantation gravity driven test to assess valve function after priming that may reduce hypotony r...

BACKGROUND To assess clinical outcomes of the Ahmed glaucoma valve implant, an aqueous shunting device with a unidirectional valve mechanism, in eyes with refractory glaucoma. METHODS Consecutive patients with intractable glaucoma who underwent Ahmed glaucoma valve insertion were retrospectively reviewed. Only patients with a minimum of 6 months of follow-up were included. The presence of int...

Globe luxation is a painful and potentially vision-threatening condition in which the globe becomes trapped behind the eyelids requiring physician intervention in the emergency department or eye clinic. On presentation, the patient typically complains of an inability to close their eye, severe foreign body sensation, decreased vision, and significant eye pain. Although most visual symptoms are ...

BACKGROUND Corneal endothelial damage is a known complication of aqueous shunt surgery. OBJECTIVE To describe a new technique for repositioning the Ahmed glaucoma valve tube in a case of tube-endothelial touch. CASE A patient with advanced glaucoma, having undergone Ahmed glaucoma valve (AVG) implantation, developed localized corneal endothelial damage due to contact between the tube and su...

PURPOSE To report a patient with symptomatic intraocular pressure (lOP) elevation in an eye with neovascular glaucoma (NVG) during hemodialysis. METHODS Case report. RESULTS Recurrent episodes of severe ocular pain and elevated IOP in the NVG eye were noted during hemodialysis in a 29-year-old man. The patient was recently diagnosed at our ophthalmology clinic with NVG due to central retina...

The treatment of refractory glaucoma (RG) is challenging. The commonly adopted strategy in RG treatment is a glaucoma drainage device (GDD) implantation, which despite its radical nature may not always provide the desired intraocular pressure (IOP) levels for a long term. This review is based on the scientific literature on Ahmed glaucoma valve (AGV) implantation for refractory glaucoma. The te...

PURPOSE To compare endoscopic cyclophotocoagulation (ECP) and the Ahmed drainage implant in the treatment of refractory glaucoma. METHODS Sixty-eight eyes of 68 patients with refractory glaucoma were prospectively assigned to either ECP or Ahmed tube shunt implantation. All procedures were performed by a single surgeon. Eyes that were included were pseudophakic with a history of at least one ...