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Comparison of dynamic contour tonometry with goldmann applanation tonometry.
Invest Ophthalmol Vis Sci 2004; 45(9):3118-21IO

Abstract

PURPOSE

The dynamic contour tonometer (DCT; Pascal tonometer) is a novel tonometer designed to measure intraocular pressure (IOP) independent of corneal properties. The purpose of this study was a comparison of the DCT with the Goldmann applanation tonometer (GAT) with respect to mean of IOP readings, the influence of ocular structural factors on IOP readings, and both intra- and interobserver variability, in a large group of healthy subjects.

METHODS

In a prospective study of 228 eyes, IOP measurements by GAT and DCT were compared, and the effects of central corneal thickness (CCT), corneal curvature, axial length, and anterior chamber depth were analyzed. To evaluate intra- and interobserver variability, IOP was measured in eight eyes by four observers.

RESULTS

There was a high concordance between the IOP readings obtained by DCT and GAT. However, IOP readings were consistently higher with DCT than with GAT (median difference: +1.7 mm Hg, interquartile range [25th-75th percentile] = 0.8-2.7 mm Hg). In contrast to GAT, multivariable regression analysis showed no significant effect of corneal thickness, corneal curvature, astigmatism, anterior chamber depth, and axial length on DCT readings. For repeated measurements the intraobserver variability was 0.65 mm Hg for the DCT and 1.1 mm Hg for the GAT (P = 0.008). Interobserver variability was 0.44 mm Hg for the DCT and 1.28 mm Hg for the GAT (P = 0.017).

CONCLUSIONS

IOP measurements by DCT are highly concordant with IOP readings obtained from GAT but do not vary in CCT and have a lower intra- and interobserver variability. DCT seems to be an appropriate method of tonometry for routine clinical use.

Authors+Show Affiliations

Department of Ophthalmology, University of Zurich, Switzerland.No affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Controlled Clinical Trial
Journal Article

Language

eng

PubMed ID

15326129

Citation

Kaufmann, Claude, et al. "Comparison of Dynamic Contour Tonometry With Goldmann Applanation Tonometry." Investigative Ophthalmology & Visual Science, vol. 45, no. 9, 2004, pp. 3118-21.
Kaufmann C, Bachmann LM, Thiel MA. Comparison of dynamic contour tonometry with goldmann applanation tonometry. Invest Ophthalmol Vis Sci. 2004;45(9):3118-21.
Kaufmann, C., Bachmann, L. M., & Thiel, M. A. (2004). Comparison of dynamic contour tonometry with goldmann applanation tonometry. Investigative Ophthalmology & Visual Science, 45(9), pp. 3118-21.
Kaufmann C, Bachmann LM, Thiel MA. Comparison of Dynamic Contour Tonometry With Goldmann Applanation Tonometry. Invest Ophthalmol Vis Sci. 2004;45(9):3118-21. PubMed PMID: 15326129.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of dynamic contour tonometry with goldmann applanation tonometry. AU - Kaufmann,Claude, AU - Bachmann,Lucas M, AU - Thiel,Michael A, PY - 2004/8/25/pubmed PY - 2004/10/8/medline PY - 2004/8/25/entrez SP - 3118 EP - 21 JF - Investigative ophthalmology & visual science JO - Invest. Ophthalmol. Vis. Sci. VL - 45 IS - 9 N2 - PURPOSE: The dynamic contour tonometer (DCT; Pascal tonometer) is a novel tonometer designed to measure intraocular pressure (IOP) independent of corneal properties. The purpose of this study was a comparison of the DCT with the Goldmann applanation tonometer (GAT) with respect to mean of IOP readings, the influence of ocular structural factors on IOP readings, and both intra- and interobserver variability, in a large group of healthy subjects. METHODS: In a prospective study of 228 eyes, IOP measurements by GAT and DCT were compared, and the effects of central corneal thickness (CCT), corneal curvature, axial length, and anterior chamber depth were analyzed. To evaluate intra- and interobserver variability, IOP was measured in eight eyes by four observers. RESULTS: There was a high concordance between the IOP readings obtained by DCT and GAT. However, IOP readings were consistently higher with DCT than with GAT (median difference: +1.7 mm Hg, interquartile range [25th-75th percentile] = 0.8-2.7 mm Hg). In contrast to GAT, multivariable regression analysis showed no significant effect of corneal thickness, corneal curvature, astigmatism, anterior chamber depth, and axial length on DCT readings. For repeated measurements the intraobserver variability was 0.65 mm Hg for the DCT and 1.1 mm Hg for the GAT (P = 0.008). Interobserver variability was 0.44 mm Hg for the DCT and 1.28 mm Hg for the GAT (P = 0.017). CONCLUSIONS: IOP measurements by DCT are highly concordant with IOP readings obtained from GAT but do not vary in CCT and have a lower intra- and interobserver variability. DCT seems to be an appropriate method of tonometry for routine clinical use. SN - 0146-0404 UR - https://www.unboundmedicine.com/medline/citation/15326129/Comparison_of_dynamic_contour_tonometry_with_goldmann_applanation_tonometry_ L2 - http://iovs.arvojournals.org/article.aspx?doi=10.1167/iovs.04-0018 DB - PRIME DP - Unbound Medicine ER -