Table 1

Contemporary glaucoma drainage devices: a summary of designs and materials

GFIs Year of introduction Tube diameter/material Plate size/material Resistance mechanism
Molteno19790.63 mm OD 0.30 mm ID silicone135 mm2 polypropyleneNone
Baerveldt19900.63 mm OD 0.30 mm ID silicone200, 250, 350, 425, 500 mm2siliconeNone
Krupin with disc19900.58 mm OD 0.38 mm ID silicone180 mm2 siliconeSlit valve
Ahmed19930.63 mm OD 0.30 mm ID silicone185 mm2 polypropylene with silicone valveVenturi valve
Optimed Model-101419950.56 mm OD 0.30 mm ID silicone140 mm2 silicone with PMMA matrixMicrotubules

  • OD = outside diameter; ID = inside diameter.