Table 1: Studies comparing Dynamic Contour Tonometry and Non-contact Tonometry.

Author Year n NCT Mean Δ IOP
(mm Hg)
LoA
(mm Hg)
Mean Age (years) Population
Burvenich 2005 294 Nidek NT 2000 2.7 ? ? Healthy
Erdurmus 2009 104 ? 0.8 -0.8 to 3.0 61.4 Glaucoma or Ocular hypertension
Ito 2012 74 Topcon CT-70 3.2 -1.9 to 8.3 70.1 Non- glaucoma
Briceno 2016 45 Visionix VX 120 1.6 -2.9 to 6.1 47.2 Healthy
Present study (OD) 2017 106 Nidek Tonoref II 3.9 -2.5 to 10.4 72.2 Headache or
Vision loss

Legend
N: number of patients.
NCT: non-contact tonometer.
DCT: dynamic contour tonometer.
Mean Δ IOP: mean difference in intraocular pressure from NCT versus DCT.
mm Hg = millimetres of mercury.
LoA: Limits of Agreement between DCT and NCT on Bland-Altman analysis.
OD: right eye.

Back to Article