title: [Comparison of Goldmann applanation and dynamic contour tonometry measurements: effects of corneal morphometry].
abstract: OBJECTIVE
  To compare intraocular pressure (IOP) measurements made by Goldmann applanation tonometry (GAT) and dynamic contour tonometry (DCT).
  
  
  METHODS
  IOPs were measured by GAT and DCT in 63 eyes of 63 healthy subjects. A comparison was made by intraclass correlation coefficient. Passing-Bablok plot was constructed to establish the existence of systematic and/or proportional biases. Multivariate regression analysis was used to examine whether the measurements of both instruments were affected by the power of the steepest and flattest corneal axes, their orientation, age or central corneal thickness (CCT).
  
  
  RESULTS
  The intra-class correlations (ICCs) were 0.57 (95% confidence interval (95% CI): 0.29-0.74). Mean differences were 1.68 (DCT minus GAT) (95% CI: 0.92-2.44). Passing-Bablok analysis (X=DCT, Y=GAT) revealed a systematic bias (A=-14.35, 95% CI: -24.51-[-9.14]) and a proportional bias (B=1.74, 95% CI: 1.43-2.26). Multivariate regression analysis revealed that the DCT was independent of the corneal characteristics analysed while GAT was biased by CCT (B=0.042, 95% CI: 0.002-0.082).
  
  
  CONCLUSIONS
  While GAT was biased by corneal CCT; DCT readings were independent of corneal morphometry.
authors: Hospital Clínico Universitario San Carlos, Instituto de Investigaciones Oftalmológicas Ramón Castroviejo, Universidad Complutense, Madrid, España. federicosaenzfrancessb@gmail.com
authors: F
authors: F
authors: Sáenz-Francés
authors: R
authors: R
authors: García-Catalán
authors: M
authors: M
authors: Jerez-Fidalgo
authors: A
authors: A
authors: Fernández-Vidal
authors: J M
authors: JM
authors: Martínez-de-la-Casa
authors: C
authors: C
authors: Méndez-Hernández
authors: E
authors: E
authors: Santos-Bueso
authors: J
authors: J
authors: Reche-Frutos
authors: J
authors: J
authors: García-Sánchez
authors: J
authors: J
authors: García-Feijoo
mesh_terms: D000367:Age Factors; D000368:Aged; D000886:Anthropometry; D015982:Bias; D015986:Confounding Factors, Epidemiologic; D003315:Cornea / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009798:Ocular Hypertension / Q000175:diagnosis*; D015203:Reproducibility of Results; D014065:Tonometry, Ocular / Q000295:instrumentation / Q000379:methods*