Comparison of Three Methods of Measuring Corneal Thickness and Anterior Chamber Depth

Buehl, Wolf; Stojanac, Danijela; Sacu, Stefan; Drexler, Wolfgang; Findl, Oliver

doi:10.1016/j.ajo.2005.08.048

Cited by 204 publications

(153 citation statements)

References 19 publications

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“…Using the Pentacam system, Amano et al (1) found an average corneal thickness of 538±31.3 µm in 54 Japanese subjects, which were in good correlation with ultrasonic and scanning-slit pachymetry. In agreement with these findings, Buehl et al (13) and Barkana et al (14) concluded that the Pentacam is a reproducible, reliable and easy to use non-contact method of measuring CCT. Lackner et al (15) compared the repeatability and reproducibility of CCT with the Pentacam, Orbscan and ultrasound concluding that Pentacam's reproducibility was the highest of all.…”

Section: Discussionmentioning

confidence: 56%

Repeatability of central corneal thickness measurement with the Pentacam HR system

Alonso¹,

Fontes²,

Ventura³

et al. 2012

Rev. bras.oftalmol.

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Purpose: To assess the repeatability of central corneal thickness measurement at the geometrical center (Central Corneal Thickness -CCT) given by the Pentacam High Resolution (HR) Comprehensive Eye Scanner (Oculus, Wetzlar, Germany) over time. Methods: Prospective, single center, observational study. Two separate CCT measurements were taken by the Pentacam corneal tomography exam (CTm) 3 to 12 months apart, and compared. Results: One hundred and sixteen eyes (n=116) of 62 health patients were included in this study. Average CCT in first and last visits was 541.6±37 µm and 543.6±36.9 µm respectively. Mean difference between both measurements was 9.2±6.4 µm, and there was no statistically significant difference in CCT measurement between visits, with good correlation between them (P = 0.057, r 2 = 0,9209). Conclusion: Pentacam (HR) CTm gives repeatable CCT measurements over time.Keywords: Cornea/anatomy & histology; Corneal topography; Biometry/methods; Reproducibility of results; Diagnostic techniques, ophthalmological/instrumentation RESUMO Objetivo: Avaliar a reprodutibilidade da medida da espessura corneana central, no seu centro geométrico, com medidas obtidas pelo sistema Pentacam de Alta Resolução (HR) com o decorrer do tempo. Métodos: Realizado estudo observacional prospectivo em Centro Oftalmológico. Duas medidas isoladas da espessura central da córnea (ECC) foram realizadas com exame de tomografia do segmento anterior Pentacam HR em períodos com intervalos maiores que 3 e em até 12 meses, sendo então comparadas os resultados. Resultados: Cento e dezesseis olhos (n = 116) de 62 pacientes saudáveis foram incluídos neste estudo. A média das medidas da ECC na primeira e na última avaliação foi de 541,6 ± 37 µm e 543,6 ± 36,9 µm, respectivamente. A diferença média entre as duas medições foi de 9,2 ± 6,4 µm, e não houve diferença estatisticamente significativa das medida da ECC entre as visitas, com boa correlação entre si (P = 0,057, r2 = 0,9209). Conclusão: O Tomógrafo de Segmento Anterior Pentacam HR apresentou medidas de ECC reprodutíveis ao longo do tempo.

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Section: Discussionmentioning

confidence: 56%

Repeatability of central corneal thickness measurement with the Pentacam HR system

Alonso¹,

Fontes²,

Ventura³

et al. 2012

Rev. bras.oftalmol.

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“…[13][14][15][16] This method has been reported to have a high degree of intraoperator and interoperator reproducibility. [4] Placement of the probe on the corneal center can lead to operator-dependent errors due to offcenter placement (thicker measurements) , [17,18] indentation (thinner readings) [19] are the drawbacks of pachymeter. Disadvantages like patient discomfort, epithelial damage and risk of infection also exist.…”

Section: Discussionmentioning

confidence: 99%

Agreement of Central Corneal Thickness Measurements Using two Different Ultra Sound Techniques

Mohankumar¹,

Jain²,

Hegde³

et al. 2016

IOSR

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“…The peripheral cornea was significantly thicker than the central cornea but tapered faster with age [17]. Recent modalities such as Pentacam, Orbscan, and AC-Master showed a high agreement with few outliers when comparing cornea thickness and anterior chamber depth values [18,19]. A single Pentacam scan will be sufficient for most clinical applications [18].…”

Section: Introductionmentioning

confidence: 99%

Short-term effects of femtosecond laser assisted cataract surgery (FLACS) on central and peripheral cornea thickness

Pahlitzsch¹,

T²

2017

New Front Ophthalmol

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Background: To assess the alterations of the cornea thickness following femtosecond laser assisted cataract surgery (FLACS) compared to the manual phacoemulsification. Methods: Data of n=42 FLACS (66.2 years) and n=40 manual phacoemulsification (71.3 years) were analysed. The procedures were performed by LenSx Alcon and Alcon Infiniti Vision System, USA. The laser setting for performing the anterior capsulotomy (diameter 5 mm) was 4.8 μJ and 8.9 μJ for the nucleus. Following parameters were examined; corneal thickness (Pentacam, Oculus Inc., Germany) at intervals of 0.4 mm to the peripheral 8 mm zone, anterior chamber depth, intraocular pressure and number of endothelial cells (NIDEK CoLtd, Japan). The analysis was performed preoperatively, directly post femtosecond laser treatment (within 15 min) and 1 day post-surgery. Results: A significant difference was not observed in the central and peripheral corneal thickness at any location (p>0.05) in FLACS compared to manual Phaco. As a trend, the complete FLACS cohort showed an increase in the peripheral corneal thickness between 4-8 mm at 1 day postoperative. The peripheral cornea thickness was significantly increased in the female FLACS cohort (4-8 mm, p<0.05). Analysing FLACS and manual Phaco considering the AC depth range of 2.5-3.5 mm could not show significant differences between the two cohorts (p>0.05). Conclusions:The results of this study suggest that conventional laser energy levels did not have a harmful short-term impact on the cornea.

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Comparison of Three Methods of Measuring Corneal Thickness and Anterior Chamber Depth

Cited by 204 publications

References 19 publications

Repeatability of central corneal thickness measurement with the Pentacam HR system

Repeatability of central corneal thickness measurement with the Pentacam HR system

Agreement of Central Corneal Thickness Measurements Using two Different Ultra Sound Techniques

Short-term effects of femtosecond laser assisted cataract surgery (FLACS) on central and peripheral cornea thickness

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