title: Phacoviscocanalostomy versus cataract surgery only in patients with coexisting normal-tension glaucoma: midterm outcomes.
abstract: OBJECTIVE
  To compare the midterm efficacy and safety of phacoviscocanalostomy (viscocanalostomy, phacoemulsification, and intraocular lens [IOL] implantation) and cataract surgery (phacoemulsification and IOL implantation) in patients with normal-tension glaucoma (NTG) and cataract.
  
  
  METHODS
  Sensho-kai Eye Institute, Kyoto, Japan.
  
  
  METHODS
  Thirty-one eyes had phacoviscocanalostomy, and 35 eyes had uncomplicated cataract surgery only. The intraocular pressure (IOP), postoperative antiglaucoma medications, and visual outcomes were compared between groups.
  
  
  RESULTS
  The mean follow-up was 34.9 months+/-19.8 (SD) (range 7 to 78 months). At 36 months, the mean preoperative IOP and postoperative IOP were 17.2+/-1.5 mm Hg and 14.1+/-1.6 mm Hg, respectively, in the phacoviscocanalostomy group and 16.7+/-1.4 mm Hg and 15.6+/-3.4 mm Hg, respectively, in the cataract surgery only group. The differences between groups were significant at all time points (P<.05). The success probabilities of the phacoviscocanalostomy group achieving 20% and 30% IOP reductions with (or without) medications were 78.5% (67.4%) and 35.5% (37.4%) at 24 months and 58.0% (44.2%) and 28.0% (26.6%) at 48 months, which were significantly better than the probabilities in the cataract surgery only group, which were 16.0% (9.5%) and 5.7% (2.9%) at 24 months (P<.001 for each comparison, Kaplan-Meier life-table analysis with log-rank test). Based on the modified Aulhorn-Greve classification, the visual acuity and visual fields did not deteriorate in the phacoviscocanalostomy group; the visual fields deteriorated in 6 eyes in the cataract surgery only group during the follow-up (P=.024).
  
  
  CONCLUSIONS
  Phacoviscocanalostomy lowered IOP and maintained postoperative visual outcomes; it was safe and effective in elderly patients with coexisting NTG and cataract.
authors.affiliation: Sensho-kai Eye Institute, Kyoto, and the Department of Ophthalmology, Shimane University School of Medicine, Shimane, Japan. t-shoji@yg7.so-net.ne.jp
authors.forename: Takuhei
authors.initials: T
authors.lastname: Shoji
authors.forename: Masaki
authors.initials: M
authors.lastname: Tanito
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Masami
authors.initials: M
authors.lastname: Park
authors.forename: Ken
authors.initials: K
authors.lastname: Hayashi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Sakurai
authors.forename: Shimpei
authors.initials: S
authors.lastname: Nishikawa
authors.forename: Etsuo
authors.initials: E
authors.lastname: Chihara
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000150:complications / Q000628:therapy*; D005260:Female; D018463:Filtering Surgery / Q000379:methods*; D005902:Glaucoma, Open-Angle / Q000150:complications / Q000601:surgery*; D006801:Humans; D007429:Intraocular Pressure; D007431:Intraoperative Complications; D019654:Lens Implantation, Intraocular / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D011183:Postoperative Complications; D012189:Retrospective Studies; D016896:Treatment Outcome; D014792:Visual Acuity; D058609:Visual Field Tests; D014794:Visual Fields