Agreement among 3 Methods to Measure Corneal Thickness: Ultrasound Pachymetry, Orbscan II, and Visante Anterior Segment Optical Coherence Tomography

Li, Emmy Y.M.; Mohamed, Shaheeda; Leung, Christopher Kai-Shun; Rao, Srinivas K; Cheng, Arthur C.K.; Cheung, Carol Y.; Lam, Dennis S.C.

doi:10.1016/j.ophtha.2007.02.017

Cited by 116 publications

(83 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Using optical pachymeters, CCT tends to be thinner compared with the readings given by ultrasonic devices. 23 Besides, these measurements require a reliable nomogram to convert GAT readings into true IOP. …”

Section: Discussionmentioning

confidence: 99%

Poor agreement between Goldmann and Pascal tonometry in eyes with extreme pachymetry

Millá

Duch

Buchacra

et al. 2008

Eye

View full text Add to dashboard Cite

Aim To compare the intraocular pressure (IOP) measurements obtained using the Pascal dynamic contour tonometer (PDCT) with the standard Goldmann applanation tonometry (GAT) and to correlate them with the central corneal thickness (CCT) in a nonglaucomatous population. Methods We prospectively measured IOP using PDCT and GAT in random order in 100 normal eyes. CCT was analysed with an ultrasonic pachymeter in each case. Statistical analysis of baseline and stratified data included intraclass correlation coefficient (ICC), Lin correlation, and Bland-Altman analysis to evaluate the agreement between both techniques. Results GAT was used first in 51 eyes and PDCT in 48 cases. Mean IOP was 14.8 mm Hg with GAT and 20.3 mm Hg with PDCT. Mean pachymetry was 553.23 micrometres (lm) (SD: 4.7 lm). Global agreement of IOP between GAT and PDCT was 0.09 by ICC and 0.170 by Lin correlation. When CCT values ranged between 540 and 545 lm, the agreement between both tonometers was optimal (ICC 0.54 and Lin 0.61). Outside these pachymetry values, agreement between both tonometers diminished dramatically. Conclusion Statistically significant agreement between both devices was reached only at intermediate pachymetry readings in contrast with other studies that show excellent global agreement between GAT and PDCT.

show abstract

Section: Discussionmentioning

confidence: 99%

Poor agreement between Goldmann and Pascal tonometry in eyes with extreme pachymetry

Millá

Duch

Buchacra

et al. 2008

Eye

View full text Add to dashboard Cite

show abstract

“…Dola yı sıy la fark lı yön tem ler le ya pı lan kor ne a ka lın lı ğı öl çüm le ri nin bir bir le riy le kı yas edil me sin de bu husus göz önün de bu lun du rul ma lı dır. 22 Kor ne a ka lın-lı ğı öl çü mün de kul la nı lan fark lı yön tem le ri de ğer len di ren ba zı araş tır ma lar li te ra tür de bil di rilmiş ol sa da, Stra tus OKT ci ha zı ile di ğer yön tem le ri kı yas la yı cı ça lış ma lar he nüz ye ter li sa yı da de ğil-dir. 5,6,[23][24][25] Ay rı ca MKK öl çü mün de Stra tus OKT ciha zı ile UBM ci ha zı nı kı yas la yan bir ça lış ma ya da li te ra tür de rast la ma dık.…”

Section: Ophthalmologyunclassified

Comparison of Stratus Optical Coherence Tomography and Ultrasound Biomicroscopy for Measurement of the Central Corneal Thickness

Türk¹,

Erdöl²,

Karagüzel³

et al. 2010

Turkiye Klinikleri J Med Sci

View full text Add to dashboard Cite

ÖZET Amaç: Birçok göz hastalığının değerlendirilmesinde merkezi kornea kalınlığının (MKK) ölçümü önemli bir rol oynamaktadır. Biz bu çalışmada sağlıklı kornealarda Stratus optik koherens tomografi ile ölçülen MKK'yı ultrasonik biyomikroskopi ile karşılaştırmayı amaçladık. Anah tar Ke li me ler: Biometri; kornea; optik koherens tomografi; akustik biyomikroskopi ABS TRACT Objective: Measurement of central corneal thickness (CCT) plays an important role in the assessment of various ocular diseases. In this study we aimed to compare the measurements of the central corneal thickness by Stratus optical coherence tomography with ultrasound biomicroscopy in the healthy corneas. Material and Methods: A total of 54 eyes of 42 (19 females, 23 males) cases aged between 35 and 83 years underwent CCT measurements with Stratus OCT and UBM. All eyes were examined first with Stratus OCT and then by UBM. Pearson's correlation analysis and paired t-test were used to evaluate the relationship between the device results. Measurements were also compared by Bland-Altman analysis. Results: The mean CCT measured by Stratus OCT and UBM were 521.31±29.98 and 525.56±30.3 μm, respectively. While the mean difference between two devices were 4.24±7.05 μm, the measurements of two devices were significantly correlated (Pearson's coefficient = 0.973, p<0.0005). In Bland-Altman analysis, there was a high level of agreement between Stratus OCT and UBM. Conclusion: Corneal thickness measurements are influenced by the device of measurement. Generally, Stratus OCT underestimates corneal thickness compared to that measured with UBM. However the differences between two devices are not clinically significant. For this reason, measurement of the CCT can be performed by a standard retinal OCT device which is an accurate, noninvasive, and repeatable technique.

show abstract

“…A variety of instruments are available for measuring the corneal thickness, and although ultrasound pachymeters are considered the gold standard [11,12], some others, such as Orbscan (Technolas Perfect Vision GmbH), Pentacam (Oculus Inc.), PARK (Oculus Inc.), Visante (Carl Zeiss Meditec ), have the advantage of performing noncontact measurements, and they are more convenient to use in most situations [13], beside all that, Specular microscopy, confocal microscopy, ultrasound biomicroscopy (UBM), slit-scanning corneal topography, the Scheimpflug system, optical biometry, and spectral optical coherence tomography (SOCT) [14], Visante™ anterior segment optical coherence tomography (Visante OCT) [15], CS4 [16], ultrasound biomicroscopy (UBM) [17], and SP-2000P are also available [18].…”

Section: Introductionmentioning

confidence: 99%

Central Corneal Thickness Measurement in Sub-Saharan Africa: Review

Soatiana¹,

Christiane²,

Kpoghoumou³

et al. 2014

IOSRJHSS

View full text Add to dashboard Cite

show abstract

Agreement among 3 Methods to Measure Corneal Thickness: Ultrasound Pachymetry, Orbscan II, and Visante Anterior Segment Optical Coherence Tomography

Cited by 116 publications

References 18 publications

Poor agreement between Goldmann and Pascal tonometry in eyes with extreme pachymetry

Poor agreement between Goldmann and Pascal tonometry in eyes with extreme pachymetry

Comparison of Stratus Optical Coherence Tomography and Ultrasound Biomicroscopy for Measurement of the Central Corneal Thickness

Central Corneal Thickness Measurement in Sub-Saharan Africa: Review

Contact Info

Product

Resources

About