Central and peripheral pachymetry measurements according to age using the Pentacam rotating Scheimpflug camera

Khoramnia, Ramin; Rabsilber, Tanja M.; Auffarth, Gerd U.

doi:10.1016/j.jcrs.2006.12.025

Cited by 105 publications

(94 citation statements)

References 33 publications

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“…Recent studies have investigated the reliability of central and peripheral corneal thickness measurements using the original rotating Scheimpflug camera system. (Khoramnia et al 2007) found good reliability for pachymetry measurements but the reliability decreased slightly towards the peripheral areas. The mean thicknesses of the apex and the thinnest portion of the cornea were 4.33 lm and 4.49 lm, respectively.…”

Section: Discussionmentioning

confidence: 88%

“…The latest high-resolution (HR) Scheimpflug camera has a redesigned optic design and is improved to maximally capture 138 000 data points in less than 2 seconds. The original device provides CCT measurements of normal corneas that are reliable and have high agreement with UP (Barkana et al 2005;Lackner et al 2005;O'Donnell & Maldonado-Codina 2005;Khoramnia et al 2007;de Sanctis et al 2007a,b;Shankar et al 2008). To our knowledge, however, there are no reports on the repeatability and reproducibility of CCT by the HR rotating Scheimpflug imaging.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of central corneal thickness by high‐resolution Scheimpflug imaging, Fourier‐domain optical coherence tomography and ultrasound pachymetry

Chen

Huang

Wen

et al. 2012

Acta Ophthalmologica

113

103

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ABSTRACT.Purpose: To compare the repeatability and reproducibility of central corneal thickness (CCT) measurements by high-resolution (HR) rotating Scheimpflug imaging and Fourier-domain optical coherence tomography (FD-OCT). CCT measurements were compared to those determined by ultrasound pachymetry (UP). Methods:In 35 healthy eyes, intra-observer repeatability for HR Scheimpflug (Pentacam) and FD-OCT (RTVue) systems was determined in consecutive images taken by an observer in the shortest time possible. Imaging was repeated again by a second observer to evaluate inter-observer reproducibility. The CCT measurements were compared among Scheimpflug, FD-OCT and UP images.Results: Mean coefficients of repeatability were 0.48% for Scheimpflug and 0.26% for FD-OCT. For Scheimpflug, the coefficient of inter-operator reproducibility was 0.87%. For FD-OCT, the coefficient of inter-operator reproducibility was 0.45%. The CCT measurements by Scheimpflug, OCT and UP images were (mean ± standard deviation) 521.7 ± 27.6 lm, 510.8 ± 28.6 lm and 516.5 ± 27.6 lm, respectively. The differences between instruments were statistically significant. The 95% limits of agreement in CCT were )0.7 to 22.5 lm for Pentacam-OCT, )13.4 to 24.0 lm for Pentacam-UP and )26.7 to 15.4 lm for OCT-UP. There was a high degree of correlation between CCT measured by all 3 methods.Conclusion: Noncontact measurements of CCT with HR Scheimpflug and FD-OCT systems yielded excellent repeatability and reproducibility and can be used interchangeably. Although both devices were comparable with UP; in clinical practice, the measurements acquired by optical modalities are not directly interchangeable with UP measurements.

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Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Measurement of central corneal thickness by high‐resolution Scheimpflug imaging, Fourier‐domain optical coherence tomography and ultrasound pachymetry

Chen

Huang

Wen

et al. 2012

Acta Ophthalmologica

113

103

View full text Add to dashboard Cite

show abstract

“…In some of the earlier studies, age had no significant effect on CCT (16)(17)(18)(19)(20)(21)(22). All these reports postulated that the number and race of the subjects, and differences in pachymeter instruments, might affect the results (10).…”

Section: Discussionmentioning

confidence: 96%

Age-related changes in biomechanical parameters of the cornea and intraocular pressure in a healthy Turkish population

Şen¹,

Elgin²,

Yüksekkaya³

et al. 2014

Turk J Med Sci

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“…Bu kalın-lığın altındaki kornealara halka implantasyonu halkanın ekstrüzyonuna, çapraz bağlama tedavisinin ince kornealara yapılması endotelyal dekompansasyona neden olabilmektedir. MKK, AKK ve EİKK normal olgularda 538,51±32,26 µ, 539,62±31,87 µ ve 535,42±33,15 µ olarak bildirilmiştir [6]. 3 aralığın-da bildirilmiştir [9,10,12].…”

Section: Discussionunclassified

Comparison of anterior segment parameters with pentacam according to age in emmetropic eyes

Çınar¹,

Cingü²,

Çınar³

et al. 2013

DicleMedj

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Objective: It was aimed to compare anterior segment parameters obtained by rotating Scheimpflug camera system according to age groups.Methods: 290 eyes of 145 emmetropic subjects were included in the study. Subjects were divided in three age groups. Group 1 comprised the subjects age up to 20 years, Group 2 comprised the subjects age between 21 and 40 and Group 3 comprised the subjects between 41 years and older. In all subjects, flat keratometry (K1), steep keratometry (K2), mean corneal power (Km), maximum keratometry (Kmax), central corneal thickness (CCT), apex corneal thickness (ACT), thinnest corneal thickness (TCT), anterior chamber volume (ACV) and anterior chamber depth (ACD) were obtained by using rotating Scheimpflug camera system. To eliminate operator dependent variables, automatic release mode was used. All measurements were obtained by the same examiner. Results:The study included 72 female and 73 male subjects. The mean age of the subjects was 31.37±12.29 years (range, 8-65). There were no significant differences in keratometric values between age groups. There was significant difference between Groups 1 and 3 and Groups 2 and 3 in the mean CCT, ACT and TCT (p<0.05). There was significant difference between the groups in the mean ACD and ACV. There significant positive correlation between age and CCT (r=0.181, p=0.001), ACT (r=0.161, p=0.006) and TCT (r=0.16, p=0.006). There were significant negative correlations between age and ACD (r=-0.376, p<0.001) and ACV (r=-0.367, p<0.001). Conclusion:In the emmetropic eyes, significant reduction was found in ACD and ACV, while there was significant increase in CCT, ACT and TCT by age. Yöntemler: Çalışmaya katılan 145 emetrop olgunun 290 gözüne ait Pentacam parametreleri değerlendirildi. Olgular yaşlarına göre üç gruba ayrıldı. Grup 1, yirmi yaşına kadar olan olguları, grup 2, 21-40 yaş arası olan olguları ve grup 3, ise 41 yaşından büyük olan olguları içermek-teydi. Tüm olguların düz keratometri (K1), dik keratometri (K2), ortalama kornea kırıcılığı (Km), maksimum keratometri (Kmax), merkezi kornea kalınlığı (MKK), apeks kornea kalınlığı (AKK), en ince kornea kalınlığı (EİKK), ön kamara hacmi (ÖKH) ve ön kamara derinliği (ÖKD) değerlendirmeye alındı. Ölçümler sırasında kullanıcıya bağlı değişkenleri ekarte etmek amacıyla otomatik çekim modu kullanıldı ve tüm çekimler aynı araştırmacı tarafın-dan yapıldı. Bulgular:Olguların 72'si kadın, 73'ü ise erkekti ve ortalama yaşları 31,37±12,29 yıl (8-65 yıl) idi. Keratometrik değerler açısından yaş grupları arasında anlamlı farklı-lık saptanmadı. Ortalama MKK, AKK ve EİKK değerleri açısından grup 1-3 ve grup 2-3 arasında, ortalama ÖKH ve ÖKD değerleri arasından ise tüm gruplarda istatistiksel olarak anlamlı farklılık mevcuttu (p<0,05). Yaş ile MKK (r=0,181, p=0,001), AKK (r=0,161, p=0,006) ve EİKK (r= 0,16, p=0,006) arasında anlamlı pozitif korelasyon saptanırken, yaş ile ÖKD (r=-0,376, p<0,001) ve ÖKH arasında (r=-0,367, p<0,001) anlamlı negatif korelasyon saptandı.Sonuç: Emetropik olgularda ileri yaş grup...

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Central and peripheral pachymetry measurements according to age using the Pentacam rotating Scheimpflug camera

Cited by 105 publications

References 33 publications

Measurement of central corneal thickness by high‐resolution Scheimpflug imaging, Fourier‐domain optical coherence tomography and ultrasound pachymetry

Measurement of central corneal thickness by high‐resolution Scheimpflug imaging, Fourier‐domain optical coherence tomography and ultrasound pachymetry

Age-related changes in biomechanical parameters of the cornea and intraocular pressure in a healthy Turkish population

Comparison of anterior segment parameters with pentacam according to age in emmetropic eyes

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