There are many different operations now available for the correction or treatment of glaucoma. Most of the procedures center around lowering the pressure. Lasers have been available for this conditions since the mid 1980s and are now considered first line therapy to achieve lower pressure. If the laser and or medications are not able to control the pressure, a small shunt or implant can be placed in the eye to let the fluid in the eye drain through different channels and thereby lower the pressure. These shunts are extremely fine and cannot even be seen without a microscope. We now have two implantable slow medication release devices that can last up to 5 years.