 |
|
Dynamic Contour Tonometry
A Comparative Study on Human Cadaver Eyes
Christoph Kniestedt, MD;
Michelle Nee, MD;
Robert L. Stamper, MD
Arch Ophthalmol. 2004;122:1287-1293.
Objective To compare intraocular pressure measurements obtained by recently introduced dynamic contour tonometry (DCT), Goldmann applanation tonometry (GAT), pneumatonometry (PTG), and intracameral manometry in human cadaver eyes.
Methods Sixteen freshly enucleated human cadaver eyes were deepithelialized and dehydrated with dextran. A tube was placed in the anterior chamber and connected to a transducer and to a bottle system filled with balanced salt solution. The pressure in the eye was then altered between 5 mm Hg and 58 mm Hg. Intraocular pressure measurements were obtained with DCT, GAT, and PTG at each manometric pressure reading.
Results On average, DCT values measured 0.58 ± 0.70 mm Hg higher than real intracameral pressure. The GAT and PGT showed consistently lower values, –4.01 ± 1.76 mm Hg and –5.09 ± 2.61 mm Hg, respectively. At all bottle heights, DCT values were significantly closer to the reference pressure than GAT and PTG (P<.001).
Conclusions Measurement with DCT provides IOP values significantly closer to true manometric levels than either GAT or PTG. Further studies are warranted to determine its reliability in patients and the effect of corneal thickness.
From the Department of Ophthalmology, University of California, San Francisco (Drs Kniestedt, Nee, and Stamper); and Department of Ophthalmology, University Hospital Zurich, Zurich, Switzerland (Dr Kniestedt). The authors have no relevant financial interest in this article.
RELATED LETTERS
Applanation Area in Goldmann Applanation Tonometry
Paul M. Tesser
Arch Ophthalmol. 2006;124(11):1664.
EXTRACT
| FULL TEXT
Applanation Area in Goldmann Applanation Tonometry—Reply
Christoph Kniestedt, Hartmut Kanngiesser, Robert L. Stamper, and Michelle Nee
Arch Ophthalmol. 2006;124(11):1664.
EXTRACT
| FULL TEXT
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES
|
Diurnal Variation of Axial Length, Intraocular Pressure, and Anterior Eye Biometrics
Read et al.
IOVS 2008;49:2911-2918.
ABSTRACT
| FULL TEXT
Effect of Riboflavin-UVA Induced Collagen Cross-linking on Intraocular Pressure Measurement
Romppainen et al.
IOVS 2007;48:5494-5498.
ABSTRACT
| FULL TEXT
Comparison of IOP measurement using GAT and DCT in patients with penetrating keratoplasties
Ismail et al.
Br. J. Ophthalmol. 2007;91:980-981.
FULL TEXT
Effect of Central Corneal Thickness on Dynamic Contour Tonometry and Goldmann Applanation Tonometry in Primary Open-angle Glaucoma
Grieshaber et al.
Arch Ophthalmol 2007;125:740-744.
ABSTRACT
| FULL TEXT
Applanation area in goldmann applanation tonometry.
Tesser
Arch Ophthalmol 2006;124:1664-1664.
FULL TEXT
Are we there yet? Celebrating the centennial of the schiotz tonometer.
Ravin and Higginbotham
Arch Ophthalmol 2006;124:1337-1338.
FULL TEXT
Ocular Pulse Amplitude in Healthy Subjects as Measured by Dynamic Contour Tonometry.
Kaufmann et al.
Arch Ophthalmol 2006;124:1104-1108.
ABSTRACT
| FULL TEXT
Clinical Comparison of Contour and Applanation Tonometry and Their Relationship to Pachymetry
Kniestedt et al.
Arch Ophthalmol 2005;123:1532-1537.
ABSTRACT
| FULL TEXT
Underestimate of Tonometric Readings after Photorefractive Keratectomy Increases at Higher Intraocular Pressure Levels
Tamburrelli et al.
IOVS 2005;46:3208-3213.
ABSTRACT
| FULL TEXT
|
