title: Pars plana vitrectomy for regression of choroidal neovascularization with age-related macular degeneration.
abstract: OBJECTIVE
  In age-related macular degeneration, the posterior vitreous surface often remains attached to a higher degree than expected for the patient's age, suggesting the involvement of the posterior vitreous membrane in the pathophysiology of choroidal neovascularization. Thus, we performed simple pars plana vitrectomy and artificial posterior vitreous detachment in order to induce regression of choroidal neovascularization.
  
  
  METHODS
  Vitrectomy was performed in 12 eyes of 11 patients with age-related macular degeneration in whom the posterior vitreous surface remained attached, and in whom there was evidence of highly active choroidal neovascularization. The posterior vitreous membrane was artificially detached during surgery, but photocoagulation and/or a subretinal procedure for choroidal neovascularization was not performed. Patients underwent fluorescein and indocyanine green angiography both pre- and postoperatively to assess the status of choroidal neovascularization.
  
  
  RESULTS
  Six months after surgery, 6 of the 12 eyes showed regression of choroidal neovascularization, and in 2 eyes it had disappeared completely. Subretinal exudative changes in 8 eyes had improved. Visual acuity testing showed improved vision in 4 eyes, unchanged vision in 4 eyes, and worsening of vision in 4 eyes. The final best corrected visual acuity was 10/20 or better in one eye, 10/ 20 to 20/200 in 7 eyes, and 20/200 or worse in 4 eyes.
  
  
  CONCLUSIONS
  The results of the present study suggest the involvement of the posterior vitreous membrane in the pathophysiology of age-related macular degeneration. Furthermore, the minimally invasive pars plana vitrectomy may represent a new treatment for age-related macular degeneration.
authors.affiliation: Department of Ophthalmology, Osaka Medical College, Japan. tikeda@poh.osaka-med.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Ikeda
authors.forename: H
authors.initials: H
authors.lastname: Sawa
authors.forename: K
authors.initials: K
authors.lastname: Koizumi
authors.forename: T
authors.initials: T
authors.lastname: Yasuhara
authors.forename: T
authors.initials: T
authors.lastname: Yamasaki
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D020256:Choroidal Neovascularization / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D005260:Female; D005451:Fluorescein Angiography; D005654:Fundus Oculi; D006801:Humans; D007208:Indocyanine Green; D008268:Macular Degeneration / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012074:Remission Induction; D016896:Treatment Outcome; D014792:Visual Acuity; D014821:Vitrectomy / Q000379:methods*; D020255:Vitreous Detachment / Q000209:etiology
chemical_list: D007208:Indocyanine Green