Clinical Comparison of Contour and Applanation Tonometry and Their Relationship to Pachymetry

Kniestedt, Christoph

doi:10.1001/archopht.123.11.1532

Cited by 104 publications

(84 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar results, in spite of different mean values, have been reported by previous investigations. 16,[19][20][21][23][24][25][26][27][28][29][30][31]35,36 The DIOP between DCT and GAT readings was higher in healthy than in glaucomatous eyes, either with open-angle or angleclosure phenotypes (Table 1). The same outcome has been found by analysing IOP measurements obtained by DCT and GAT in different groups of subjects with the same CCT value, except for POAG subjects with thinner corneas.…”

Section: Discussionmentioning

confidence: 99%

“…16 DCT was designed to be largely independent of structural properties of the cornea and to eliminate most of the systematic errors arising from physiological variables of the eye, which render GAT less accurate. 17 Some recent studies compared the performance of the new device against other tonometers [18][19][20][21][22] considering either the influence of pachymetry on IOP readings [23][24][25][26] or the impact of refractive surgery as a source of errors in applanation tonometry. [27][28][29][30] Only two studies evaluated ocular structural factors other than pachymetry influencing IOP measurements in healthy subjects 31 or African American subjects.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

Ceruti

Morbio

Marraffa

et al. 2008

Eye

View full text Add to dashboard Cite

Purpose To compare the measurements of intraocular pressure (IOP) with dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in healthy and glaucomatous eyes and to evaluate the influence of corneal thickness (CCT), corneal curvature (CC), axial length (AL), and age on these tonometric alternatives. Methods Three hundred eyes of 100 healthy subjects, 100 patients with primary open angle glaucoma, and 100 patients with primary angle-closure glaucoma underwent IOP evaluation with DCT and GAT, and measurements of CCT, CC, and AL. Bland-Altman plots were used to evaluate the agreement between tonometers. Regression analysis was used to evaluate the influence of ocular structural factors on IOP measurements obtained with both tonometers. Results Bland-Altman plots indicated that the 95% limits of agreement between tonometers were À1.4 to 6.6 mmHg. DCT values measured 2.6 ± 1.9 mmHg higher than GAT readings (Po0.001). The mean IOP difference between DCT and GAT (DIOP) was higher in healthy than in glaucomatous eyes and the magnitude of difference increased with increasing CCT. A significant reduction of DIOP with an increase in both CCT (Po0.001) and IOP values (Po0.001) was found. Regression analysis showed no effect of CC, AL, and age on both DCT and GAT readings. In contrast to GAT (Po0.001), DCT measurements were not influenced by CCT (P ¼ 0.43).Conclusions IOP readings obtained by DCT were higher and less affected by CCT than those by GAT. The DIOP was higher in healthy than in glaucomatous eyes and decreased in relation to increased CCT and IOP values.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

Ceruti

Morbio

Marraffa

et al. 2008

Eye

View full text Add to dashboard Cite

show abstract

“…11,12 One of these studies found a significant relationship between CCT and ONH rim area at the time of referral of glaucoma patients but found no relationship between CCT and risk of progression during follow-up. 11 In these samples, the substantial confounding effects of IOP, as measured by applanation, which may have a nonlinear relationship with CCT, 18 and those of the glaucomatous process, may make isolation of the relationship between CCT and ONH difficult. Age is a further confounding factor since CCT decreases, 10,19,20 and POAG prevalence increases, with advancing years.…”

Section: Discussionmentioning

confidence: 99%

The relationship between central corneal thickness and the optic disc in an elderly population: the Bridlington Eye Assessment Project

Hawker

Edmunds

Vernon

et al. 2007

Eye

View full text Add to dashboard Cite

Purpose To determine population-based normative CCT data for elderly white subjects, with and without diabetes, and to explore the relationship between CCT and IOP and HRT2 measurements in such subjects with normal visual fields. Methods All eligible subjects were consecutive in a population screened for eye disease. CCT was measured by ultrasound pachymetry, and the optic disc was morphometrically defined using Heidelberg retinal tomography (HRT2). Inclusion criteria were: (1) normal visual field on suprathreshold testing and (2) corrected logMAR acuity of at least 0.3 in both eyes. Subjects with significant corneal pathology, previous corneal surgery, or known history of glaucoma or treatment for raised intraocular pressure were excluded. One eye was randomly selected from each subject for analysis. Results In all, 983 eyes of 983 subjects were included with 690 HRT images deemed acceptable for the analysis. The mean age (414 men and 569 women) was 73.3 years (minimum 65 years). Mean (SD) CCT was 544.1 (36.5) lm, with a normally distributed range of 429-633 lm. There was no significant difference in CCT between men and women (mean CCT 546.1 and 542.7 lm, respectively, P ¼ 0.15, Student's t-test), though CCT was correlated weakly and negatively with age (Pearson's r ¼ À0.063, P ¼ 0.047). Diabetic patients (n ¼ 103) had a greater mean CCT than non-diabetic patients (551.9 and 543.0 lm respectively, P ¼ 0.02). No significant correlation was found between any global optic disc parameter and CCT in the 690 eyes analysed. Conclusion Elderly white eyes with normal fields have CCTs that are normally distributed, with those from diabetic persons having greater CCTs. No clear evidence of a relationship between CCT and HRT2 optic disc parameters used in glaucoma diagnosis was found.

show abstract

“…A medida da ECC tornou-se um importante fator biométrico e é parte essencial na propedêutica do glaucoma (3)(4)(5)(11)(12) . Os valores da PIO obtidos com o TCDP em nosso estudo foram maiores que os encontrados com o TAG (3,4,11) .…”

Section: Discussionunclassified

“…Os valores da PIO obtidos com o TCDP em nosso estudo foram maiores que os encontrados com o TAG (3,4,11) . A média de diferença entre as duas técnicas foi de -3.1 (±2.42).…”

Section: Discussionunclassified

Espessura central da córnea e a medida da pressão intra-ocular com diferentes tonômetros

Kitice

Nunes

Giustina

et al. 2007

Rev. bras.oftalmol.

View full text Add to dashboard Cite

Clinical Comparison of Contour and Applanation Tonometry and Their Relationship to Pachymetry

Cited by 104 publications

References 33 publications

Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

Comparison of Goldmann applanation tonometry and dynamic contour tonometry in healthy and glaucomatous eyes

The relationship between central corneal thickness and the optic disc in an elderly population: the Bridlington Eye Assessment Project

Espessura central da córnea e a medida da pressão intra-ocular com diferentes tonômetros

Contact Info

Product

Resources

About