Influence of age, central corneal thickness, and quality score on dynamic contour tonometry

Aims To compare the IOP measurements obtained with dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT), and to analyse the influence of central corneal thickness (CCT) and age on both measurements, and the influence of the quality score on DCT readings. Methods A total of 500 healthy subjects with no prior history of glaucoma or ocular hypertension (age: 7–86 years) were consecutively recruited. GAT, DCT, and CCT measurements were obtained from both eyes of each individual, in this order, by three observers. The mean of five CCT measurements was used for analysis. DCT measurements were accepted when quality scores varied between 1 (higher quality) and 3 (lower quality). Results Mean DCT measurements were 3.2 mmHg higher than GAT readings. CCT values varied between 449 and 653 μ m. IOP measured by GAT correlated strongly with CCT ( r 2 =0.28, P =