Related Experiment Video
Updated: May 4, 2026
Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
[Comparison of dynamic contour tonometry, Goldmann applanation Tonometry and tonopen for measuring intraocular
Shimon Kurtz1, Uri Soiberman1, Gabi Shemesh1
1Department of Ophthalmology Tel Aviv Medical Center, Israel, and the Sackler Faculty of Medicine, Tel Aviv University, Israel.
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.
Objectives:
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.
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