Comparison of Central Corneal Thickness with Ultrasound Pachymetry, Noncontact Specular Microscopy and Spectral Domain Optical Coherence Tomography

2018 ◽  
Vol 33 (6) ◽  
pp. 782-787 ◽  
Author(s):  
Sevil Karaman Erdur ◽  
Goktug Demirci ◽  
Funda Dikkaya ◽  
Mehmet Selim Kocabora ◽  
Mustafa Ozsutcu
Keyword(s):  
Optical Coherence Tomography ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Spectral Domain ◽  
Specular Microscopy ◽  
Optical Coherence ◽  
Ultrasound Pachymetry

scholarly journals Comparison of central corneal thickness: ultrasound pachymetry versus slit-lamp optical coherence tomography, specular microscopy, and Orbscan

2015 ◽  
pp. 1065 ◽  
Author(s):  
Kakarla Chalam ◽  
Wassia Khaja ◽  
Sandeep Grover ◽  
Amy Kelmenson ◽  
Lee Ferguson ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Specular Microscopy ◽  
Optical Coherence ◽  
Slit Lamp ◽  
Ultrasound Pachymetry

Comparison of Central Corneal Thickness Measurements by Visante Anterior Segment Optical Coherence Tomography With Ultrasound Pachymetry

2007 ◽  
Vol 143 (6) ◽  
pp. 1047-1049 ◽  
Author(s):  
Paul S. Zhao ◽  
Tien Yin Wong ◽  
Wan-Ling Wong ◽  
Seang-Mei Saw ◽  
Tin Aung
Keyword(s):  
Optical Coherence Tomography ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Ultrasound Pachymetry ◽  
Thickness Measurements

Precision of High Definition Spectral-Domain Optical Coherence Tomography for Measuring Central Corneal Thickness

2012 ◽  
Vol 53 (4) ◽  
pp. 1752 ◽  
Author(s):  
María E. Correa-Pérez ◽  
Alberto López-Miguel ◽  
Silvia Miranda-Anta ◽  
Darío Iglesias-Cortiñas ◽  
Jorge L. Alió ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Spectral Domain ◽  
Optical Coherence ◽  
High Definition

scholarly journals Comparison of Central Corneal Thickness Measured by Standard Ultrasound Pachymetry, Corneal Topography, Tono-Pachymetry and Anterior Segment Optical Coherence Tomography

2018 ◽  
Vol 43 (7) ◽  
pp. 866-872 ◽  
Author(s):  
Javier González-Pérez ◽  
Juan Queiruga Piñeiro ◽  
Ángelx Sánchez García ◽  
José Manuel González Méijome
Keyword(s):  
Optical Coherence Tomography ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Corneal Topography ◽  
Optical Coherence ◽  
Ultrasound Pachymetry

scholarly journals Intraoperative Pachymetry Using Spectral-Domain Optical Coherence Tomography during Accelerated Corneal Collagen Crosslinking

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Vanissa W. S. Chow ◽  
Sayantan Biswas ◽  
Marco Yu ◽  
Victoria W. Y. Wong ◽  
Vishal Jhanji
Keyword(s):  
Optical Coherence Tomography ◽  
Corneal Thickness ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Ultrasound Pachymetry ◽  
Significant Difference ◽  
Corneal Collagen Crosslinking ◽  
Corneal Collagen ◽  
Corneal Thinning

Purpose. To evaluate the role of spectral-domain optical coherence tomography (SDOCT) to measure corneal thickness during accelerated corneal crosslinking (CXL).Methods. Intraoperative pachymetry was performed using SDOCT and ultrasound pachymetry (USP) in 6 eyes of 6 patients with keratoconus. Pachymetry readings were obtained at baseline, after epithelium removal and after 30 minutes of riboflavin instillation. SDOCT measurements of eyes with and without lid speculum during riboflavin instillation were compared.Results. There was no statistically significant difference in central corneal thickness (CCT) measurements between SDOCT and USP (P>0.05for all). A significant decrease in both CCT (P=0.031) and the thinnest corneal thickness (TCT) (P=0.031) was observed during CXL. There was a greater reduction in CCT (38 ± 6%) with the use of lid speculum as compared to the no-speculum eyes (18 ± 9%) (P=0.100). TCT was also reduced by a greater extent with the use of lid speculum (40 ± 5% versus 26 ± 7%;P=0.100).Conclusion. SDOCT can be successfully used to measure intraoperative corneal pachymetry during corneal CXL. SDOCT measurements demonstrated corneal thinning intraoperatively during CXL, which was further accentuated by the use of a lid speculum during the procedure.

scholarly journals Study of central corneal thickness using non-contact techniques: Specular microscopy (Nidek CEM-530), corneal tomography (Pentacam HR), and optical coherence tomography (Cirrus HD-OCT 5000) in healthy adult patients

2018 ◽  
Vol 16 (1) ◽  
pp. 25-31
Author(s):  
Patricia González-Rodríguez ◽  
Vanesa Blázquez-Sánchez ◽  
Sara Fernández-Cuenca
Keyword(s):  
Optical Coherence Tomography ◽  
Central Corneal Thickness ◽  
Healthy Adult ◽  
Adult Population ◽  
Corneal Thickness ◽  
Adult Patients ◽  
Specular Microscopy ◽  
Optical Coherence ◽  
Significant Difference ◽  
Corneal Tomography

Objective: To study and compare the value of central corneal thickness in a healthy adult population, using different non-contact techniques from daily clinical practice. Method: This work examines and compares the pachymetric measurements of 71 eyes of 36 healthy adult patients. Corneal thickness was evaluated using three non-contact instruments: a CEM-530 specular microscope (Nidek), Pentacam HR corneal tomography (Oculus), and Cirrus HD-OCT 5000 optical coherence tomography (Carl Zeiss Meditec). Tests were performed consecutively by a single observer in the same session and under the same environmental conditions. Results: The results obtained using the three devices are interchangeable, given that no statistically significant difference was observed among them. The study did not find statistically significant difference with respect to gender either. Conclusion: These three non-contact methods for the measurement of corneal central pachymetry are a reliable alternative to ultrasonic contact pachymetry.

scholarly journals Comparison of Central Corneal Thickness Measurements between Angiovue Optical Coherence Tomography, Ultrasound Pachymetry and Ocular Biometry

2020 ◽  
pp. 1-9
Author(s):  
E. Pateras ◽  
A. I. Kouroupaki
Keyword(s):  
Optical Coherence Tomography ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Repeated Measurements ◽  
Optical Coherence ◽  
Swept Source ◽  
Ocular Biometry ◽  
Significant Linear Correlation ◽  
Ultrasound Pachymetry ◽  
The Mean

Purpose: To compare central corneal thickness (CCT) measurements and their reproducibility when taken by Ultrasound Pachymetry, Ocular Biometry and Angiovue Optical Coherence Tomography (OCT). Methods: Twenty-five healthy volunteers were recruited creating a sample size of 50 eyes. All subjects had pachymetric measurements by Ultrasound pachymetry (PachPen Handheld Pachymeter, Keeler Instruments Inc), Ocular biometry (IOL Master 700 Swept Source Biometry, Zeiss) and Angiovue Optical Coherence Tomography (Optovue Avanti RTVue XR Angiovue). The measurements of central corneal thickness for the three devices were taken by the same examiner twice for more accuracy. Results: The average measurements of central corneal thickness by Ultrasound pachymetry (PachPen Handheld Pachymeter, Keeler Instruments Inc), Ocular biometry (IOL Master 700 Swept Source Biometry, Zeiss) and Angiovue Optical Coherence Tomography (Optovue Avanti RTVue XR Angiovue) were 547.26 μm, 551.36 μm, and 536.42 μm, respectively. The mean standard deviation (SD) of repeated measurements by Ocular biometry was 48.87 μm, which was greater than the mean SD of 44.24 μm and 40.35 μm (P < 0.001) by ultrasound pachymetry and Angiovue optical coherence tomography, respectively. There were statistically significant differences in the measurement results among the 3 methods (Ultrasound pachymetry vs. Ocular biometry P = 0.019; Ultrasound pachymetry vs. Angiovue Optical Coherence Tomography; P < 0.001; Ocular biometry vs. Angiovue Optical Coherence Tomography P < 0.001). There was a significant linear correlation between the Ultrasound pachymetry and Ocular biometry (r = 0.945, P<0.001), Ultrasound pachymetry and Angiovue Optical Coherence Tomography (r = 0.895, P<0.001), and Ocular biometry and Angiovue Optical Coherence Tomography (r = 0.902, P<0.001). Conclusion: Central corneal thickness readings were comparable between PachPen Handheld Pachymeter, IOL Master 700 Biometry and Angiovue Optical Coherence Tomography; Angiovue optical coherence tomography gave significantly smaller values. The measurements of the 3 methods showed significant linear correlations with one another. All methods provided acceptable repeatability of measurements.

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