title: Capsular tension rings and related devices: current concepts.
abstract: OBJECTIVE
  To discuss current designs, indications, contraindications and controversies pertaining to capsular tension devices.
  
  
  RESULTS
  Capsular tension rings and other newer endocapsular support devices have become increasingly important in the management of zonular weakness during cataract extraction. They have been found to improve both intraoperative support during phacoemulsification and postoperative intraocular lens centration. Since the introduction of the original capsular tension rings in 1991, there has been a progressive evolution of this device to help deal with profound zonular weakness. These newer devices, which permit scleral-suture fixation, include the modified capsular tension ring and the capsular tension segment.
  
  
  CONCLUSIONS
  Continual advances in capsular tension device technology have allowed for increased safety and efficacy in performing cataract surgery in patients with zonular weakness with newer devices being evolved to manage more profound cases.
authors.affiliation: University of Toronto, Toronto, Ontario, Canada.
authors.forename: Khalid
authors.initials: K
authors.lastname: Hasanee
authors.forename: Michael
authors.initials: M
authors.lastname: Butler
authors.forename: Iqbal Ike K
authors.initials: II
authors.lastname: Ahmed
mesh_terms: D002387:Cataract Extraction / Q000295:instrumentation*; D006801:Humans; D007903:Lens Capsule, Crystalline / Q000601:surgery*; D019904:Polymethyl Methacrylate; D019736:Prostheses and Implants; D011474:Prosthesis Design; D019919:Prosthesis Implantation
chemical_list: D019904:Polymethyl Methacrylate