Table 2: Differences in IOP between different tonometers and Goldmann applanation tonometry [3].

TonometerMean difference between tonometer and GAT 95% confidence interval 95% limits of agreement% within 2 mmHg

DCT1.8+1.3+2.3−3.0+6.647
NCT0.3−0.1+0.7−3.5+4.069
ORA1.5+0.9+2.2−4.3+7.345
Ocuton S2.7−1.2+6.7−4.0+9.633
RT-(Icare)0.9+0.5+1.5−4.3+6.351
TonoPen0.2−0.4+0.9−5.2+5.752
Transpalpebral−0.5−1.3+0.3−7.0+5.945

DCT, dynamic contour tonometer; NCT, noncontact tonometer; ORA, ocular response analyzer; RT, rebound tonometer.
Reproduced from [3] with permission from the European Glaucoma Society.