text: Surgery
  Trabeculectomy should be considered in all patients, when the 'target IOP' is not achieved with glaucoma medications and if the expected rate of visual loss could affect the patient during their lifetime. In this procedure, an opening is made in the trabecular meshwork, so that aqueous humor can drain into the sclera.
  Many patients can discontinue glaucoma medications after surgery. Approximately one-third of the trabeculectomy patients develop cataract within five years. If trabeculectomy fails, another type of surgery places a drainage tube (Molteno tube) in the eye, between the cornea and iris, which exits at the junction of the cornea and sclera. Cyclodestructive procedures, which lower IOP by destroying the ciliary body, are typically reserved for eyes, which are refractory to all other forms of therapy. These procedures include cyclocryotherapy, cylcodiathermy and laser cyclophotocoagulation.[91-93]
  
entities.text: ['humor']
entities.type: Organism_substance
entities.entity_id: PMC-2792620-sec-33_T1
entities.text: ['sclera']
entities.type: Multi-tissue_structure
entities.entity_id: PMC-2792620-sec-33_T2
entities.text: ['eye']
entities.type: Organ
entities.entity_id: PMC-2792620-sec-33_T3
entities.text: ['cornea']
entities.type: Multi-tissue_structure
entities.entity_id: PMC-2792620-sec-33_T4
entities.text: ['iris']
entities.type: Multi-tissue_structure
entities.entity_id: PMC-2792620-sec-33_T5
entities.text: ['cornea']
entities.type: Multi-tissue_structure
entities.entity_id: PMC-2792620-sec-33_T6
entities.text: ['sclera']
entities.type: Multi-tissue_structure
entities.entity_id: PMC-2792620-sec-33_T7
entities.text: ['ciliary body']
entities.type: Multi-tissue_structure
entities.entity_id: PMC-2792620-sec-33_T8
entities.text: ['eyes']
entities.type: Organ
entities.entity_id: PMC-2792620-sec-33_T9
entities.text: ['trabecular']
entities.type: Organ
entities.entity_id: PMC-2792620-sec-33_T10