title: [Comparison of dynamic contour tonometry, Goldmann applanation Tonometry and tonopen for measuring intraocular pressure in normal tension glaucoma].
abstract: BACKGROUND
  Normal tension glaucoma (NTG) is a chronic progressive optic neuropathy, characterized by relatively normal intraocular pressure (IOP) measurements. This study utilized three modalities in the measurement of lOP: dynamic contour tonometry (Pascal-DCT), Goldmann applanation tonometry (GAT) and Tonopen XL.
  
  
  OBJECTIVE
  To compare the lOP measurements of the three devices in eyes with NTG.
  
  
  METHODS
  This retrospective study of thirty-three NTG patients (66 eyes) who underwent lOP measurements using the three devices was approved by a local ethics committee. The lOP measurements were stratified according to central corneal thickness (CCT) and corneal curvature (CC).
  
  
  RESULTS
  The mean DCT IOP was higher (16.22 +/- 3.04 mmHg) than the mean GAT IOP (13.14 +/- 2.83 mmHg, P < 0.0042). The mean Tonopen XL lOP was lower than the mean GAT IOP (12.76 +/- 3.11 mmHg, P < 0.001). GAT and DCT measurements were significantly infLuenced by corneal curvature (P = 0.004 and P < 0.0001, respectiveLy).
  
  
  CONCLUSIONS
  lOPs measured by GAT or Tonopen XL were consistently lower than by DCT. CC significantly influenced GAT and DCT results.
authors.affiliation: Department of Ophthalmology Tel Aviv Medical Center, Israel, and the Sackler Faculty of Medicine, Tel Aviv University, Israel.
authors.forename: Shimon
authors.initials: S
authors.lastname: Kurtz
authors.affiliation: Department of Ophthalmology Tel Aviv Medical Center, Israel, and the Sackler Faculty of Medicine, Tel Aviv University, Israel.
authors.forename: Uri
authors.initials: U
authors.lastname: Soiberman
authors.affiliation: Department of Ophthalmology Tel Aviv Medical Center, Israel, and the Sackler Faculty of Medicine, Tel Aviv University, Israel.
authors.forename: Gabi
authors.initials: G
authors.lastname: Shemesh
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D057066:Low Tension Glaucoma / Q000175:diagnosis* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014065:Tonometry, Ocular / Q000379:methods*