Introduction. Glaucoma represents a group of diseases defined by optic neuropathy, determined by structural change and functional deficit. It is a significant public health problem, being the leading cause of irreversible visual loss, affecting subjects older than 40 years. By the year 2020 it is estimated that there will be almost 80 million affected people in the world. The treatment strategy is influenced by patient's life expectancy, disease status, progression rate and visua l function. When conventional therapies and classic surgery have failed or it is expected to be no success, the latest solution is the implantation of artificial implants. There is a multitude of drainage devices. Drainage implants have surgical and postop erative complications similar to trabeculectomy, but there are other unique complications associated with their use. Aim of the study. Point out the most frequent outcomes after drainage implants use. Materials and methods. A literature review of the artic les published on Pubmed from 2007 to 2017 years was done. The comparisons between various drainage implants are difficult because most clinical data are derived from retrospective studies with different study populations, follow up periods, and criteria de fining success. Results. Complications such as hypotony, diplopia, strabismus, endophthalmitis are all important ( 2009), but their incidence decreased with the passage of time due to implantation techniques improvement. Jong’s study ( repor ted that by the end of the third year after surgery IOP remained better controlled by antiglaucomatous device (Ex press) than by trabeculectomy. The success rates of the different valves (Krupin and Ahmed) are about equal at approximately 70% with a mean I OP lowering of at least 50% from the pre operative IOP. Unfortunately, the failure rate is about 10% per year, leading to only 50% functional drainage devices in 5 years ( 2010, Budenz, 2011). An important outcome is pointed to the total protein abun dance levels that were increased in eyes with glaucoma surgery shows Rosenfeld ( and Freedman’s ( research. The findings (increase in protein and their alteration impact on the pathways) helped explain why glaucoma filtering surgeries are associa ted with endothelial cell failure and increase corneal decompensation in virgin corneas and after transplantation. A prospective evaluation of corneal endothelial cell loss within the first 2 years after Ahmed aqueous shunt implantation made by Lee ( found increasing cell loss: 15% at 12 months and 19% at 24 months. Other factor that causes the corneal decompensation is the direct contact between the tube and the endothelium ( 2016). Conclusions. Glaucoma drainage implants are a good tool in preve nting blindness; however, they have specific complications and controversy.