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Comparison of dynamic contour tonometry and goldmann applanation tonometry in African American subjects.
Ophthalmology 2007; 114(4):658-65O

Abstract

PURPOSE

To evaluate the relationship between intraocular pressure (IOP) measurements obtained by dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in African Americans and to assess whether these measures were influenced by ocular parameters including corneal thickness, corneal curvature, and axial length.

DESIGN

Observational clinical study.

PARTICIPANTS

The study included 176 eyes of 94 African Americans.

METHODS

All participants underwent IOP evaluation with DCT and GAT, as well as measurements of central corneal thickness (CCT), corneal curvature, corneal astigmatism, spherical equivalent, and axial length.

MAIN OUTCOME MEASURES

Univariate and multiple regression analyses were used to evaluate the associations between IOP (as measured with DCT and GAT) and CCT, corneal curvature, corneal astigmatism, spherical equivalent, axial length, and age. Bland-Altman plots were used to evaluate the agreement between IOP measurements obtained by DCT and GAT.

RESULTS

In multiple regression analysis, GAT IOP measurements were significantly associated with CCT (P<0.001) and age (P = 0.003), whereas DCT IOP measurements were associated only with age (P = 0.027). The difference between DCT and GAT IOP measurements was significantly influenced by corneal thickness (P<0.001) and ocular pulse amplitude (OPA; P = 0.004). Patients with thick corneas tended to have higher GAT IOP measurements compared with DCT, whereas in patients with thin corneas, GAT IOP measurements tended to be lower than DCT measurements. Larger values of OPA were associated with a decrease in the difference between DCT and GAT measurements, whereas smaller values of OPA were associated with an increase in the difference between DCT and GAT measurements.

CONCLUSIONS

Dynamic contour tonometry measurements in African Americans seem to provide an estimate of IOP that is less influenced by corneal properties than those provided by GAT.

Authors+Show Affiliations

Hamilton Glaucoma Center and Department of Ophthalmology, University of California, San Diego, La Jolla, California 92093-0946, USA. fmedeiros@eyecenter.ucsd.eduNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

17141320

Citation

Medeiros, Felipe A., et al. "Comparison of Dynamic Contour Tonometry and Goldmann Applanation Tonometry in African American Subjects." Ophthalmology, vol. 114, no. 4, 2007, pp. 658-65.
Medeiros FA, Sample PA, Weinreb RN. Comparison of dynamic contour tonometry and goldmann applanation tonometry in African American subjects. Ophthalmology. 2007;114(4):658-65.
Medeiros, F. A., Sample, P. A., & Weinreb, R. N. (2007). Comparison of dynamic contour tonometry and goldmann applanation tonometry in African American subjects. Ophthalmology, 114(4), pp. 658-65.
Medeiros FA, Sample PA, Weinreb RN. Comparison of Dynamic Contour Tonometry and Goldmann Applanation Tonometry in African American Subjects. Ophthalmology. 2007;114(4):658-65. PubMed PMID: 17141320.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of dynamic contour tonometry and goldmann applanation tonometry in African American subjects. AU - Medeiros,Felipe A, AU - Sample,Pamela A, AU - Weinreb,Robert N, Y1 - 2006/11/30/ PY - 2006/03/15/received PY - 2006/06/09/revised PY - 2006/06/28/accepted PY - 2006/12/5/pubmed PY - 2007/4/14/medline PY - 2006/12/5/entrez SP - 658 EP - 65 JF - Ophthalmology JO - Ophthalmology VL - 114 IS - 4 N2 - PURPOSE: To evaluate the relationship between intraocular pressure (IOP) measurements obtained by dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in African Americans and to assess whether these measures were influenced by ocular parameters including corneal thickness, corneal curvature, and axial length. DESIGN: Observational clinical study. PARTICIPANTS: The study included 176 eyes of 94 African Americans. METHODS: All participants underwent IOP evaluation with DCT and GAT, as well as measurements of central corneal thickness (CCT), corneal curvature, corneal astigmatism, spherical equivalent, and axial length. MAIN OUTCOME MEASURES: Univariate and multiple regression analyses were used to evaluate the associations between IOP (as measured with DCT and GAT) and CCT, corneal curvature, corneal astigmatism, spherical equivalent, axial length, and age. Bland-Altman plots were used to evaluate the agreement between IOP measurements obtained by DCT and GAT. RESULTS: In multiple regression analysis, GAT IOP measurements were significantly associated with CCT (P<0.001) and age (P = 0.003), whereas DCT IOP measurements were associated only with age (P = 0.027). The difference between DCT and GAT IOP measurements was significantly influenced by corneal thickness (P<0.001) and ocular pulse amplitude (OPA; P = 0.004). Patients with thick corneas tended to have higher GAT IOP measurements compared with DCT, whereas in patients with thin corneas, GAT IOP measurements tended to be lower than DCT measurements. Larger values of OPA were associated with a decrease in the difference between DCT and GAT measurements, whereas smaller values of OPA were associated with an increase in the difference between DCT and GAT measurements. CONCLUSIONS: Dynamic contour tonometry measurements in African Americans seem to provide an estimate of IOP that is less influenced by corneal properties than those provided by GAT. SN - 1549-4713 UR - https://www.unboundmedicine.com/medline/citation/17141320/Comparison_of_dynamic_contour_tonometry_and_goldmann_applanation_tonometry_in_African_American_subjects_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0161-6420(06)01151-1 DB - PRIME DP - Unbound Medicine ER -