scholarly journals Comparison of a new swept-source optical biometer with a partial coherence interferometry

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Hyo Kyung Lee ◽  
Mee Kum Kim
Keyword(s):  
Partial Coherence ◽  
Swept Source ◽  
Partial Coherence Interferometry ◽  
Optical Biometer

scholarly journals Comparison of axial length using a new swept-source optical coherence tomography-based biometer - ARGOS with partial coherence interferometry- based biometer -IOLMaster among school children

PLoS ONE ◽  
2018 ◽  
Vol 13 (12) ◽  
pp. e0209356 ◽  
Author(s):  
Jameel Rizwana Hussaindeen ◽  
Ephrame G. Mariam ◽  
Sushil Arunachalam ◽  
Ramakrishnan Bhavatharini ◽  
Aparna Gopalakrishnan ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
School Children ◽  
Axial Length ◽  
Partial Coherence ◽  
Optical Coherence ◽  
Swept Source ◽  
Partial Coherence Interferometry

scholarly journals Comparative analysis of two optical biometry devices: high wavelength swept source OCT versus partial coherence interferometry

2021 ◽  
Author(s):  
Eszter Szalai ◽  
Adrienne Csutak
Keyword(s):  
Anterior Chamber Depth ◽  
Partial Coherence ◽  
Anterior Surface ◽  
Swept Source ◽  
Partial Coherence Interferometry ◽  
Significant Difference ◽  
Swept Source Oct ◽  
Iol Power ◽  
The Difference ◽  
High Wavelength

Abstract Purpose To study the reproducibility of measurements performed with a recently developed multimodal high resolution swept source optical coherence tomography (SSOCT) and to make comparisons with a partial coherence interferometry (PCI) biometer. Methods One hundred and fifty-two eyes of 152 subjects were involved in this study with a mean age of 65.71 ± 13.86 years (26–85 years). Anterior surface keratometry (K), anterior chamber depth (ACD), white-to-white (WTW) and axial length (AL) values were recorded by the SSOCT (ANTERION, Heidelberg Engineering Ltd, Germany) and PCI (IOLMaster 500, version 5.5, Carl Zeiss Meditec, Germany). Intraocular lens (IOL) power was calculated based on ANTERION and IOLMaster keratometry values by using five traditional vergence formulas. Results Anterior surface simulated keratometry values did not differ significantly between the IOLMaster and ANTERION (P > 0.05). AL measurements were successful in 95% of the cases both with the SSOCT and PCI. No significant difference was disclosed between the two instruments (P = 0.229). For WTW measurements, a significant difference was observed between the two optical biometers (P < 0.0001). The difference between PCI and SSOCT in IOL powers was statistically significant for SRK/T, Hoffer and Holladay formulas (P < 0.001). Conclusion Our results implicated an overall good reproducibility of anterior keratometry, AL, ACD and WTW measurements for IOLMaster and ANTERION. The discrepancies between their measurements resulted in significant difference in the calculated IOL power for SRK/T, Hoffer and Holladay formulas, but not for Haigis formula.

Assessing the Validity of Measurements of Swept-source and Partial Coherence Interferometry Devices in Cataract Patients

2019 ◽  
Vol 96 (10) ◽  
pp. 745-750 ◽  
Author(s):  
Reza Ghaffari ◽  
Raziyeh Mahmoudzadeh ◽  
S.Saeed Mohammadi ◽  
Mirataollah Salabati ◽  
Golshan Latifi ◽  
...  
Keyword(s):  
Partial Coherence ◽  
Swept Source ◽  
Partial Coherence Interferometry ◽  
Cataract Patients

scholarly journals Comparison of Two Novel Swept-Source Optical Coherence Tomography Devices to A Partial Coherence Interferometry-Based Biometer

2020 ◽  
Author(s):  
Tommy Chan ◽  
Marco Yu ◽  
Vivian Chiu ◽  
Gilda Lai ◽  
Christopher Leung ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber Depth ◽  
Cross Sectional Study ◽  
Systematic Difference ◽  
Partial Coherence ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Swept Source ◽  
Partial Coherence Interferometry ◽  
Significant Disagreement

Abstract Purpose To evaluate the repeatability and agreement of cornea and biometry measurements obtained with two swept-source optical coherence tomography (SSOCT) and a partial coherence interferometry-based device.METHODS This is a cross-sectional study. Forty-eight eyes of 48 patients had three consecutive measurements for ANTERION (Heidelberg Engineering, Germany), CASIAII (Tomey, Japan) and IOLMaster500 (Carl Zeiss Meditec, USA) on the same visit. Mean keratometry (Km), central cornea thickness (CCT), anterior chamber depth (ACD) and axial length (AL) were recorded. Corneal astigmatic measurements were converted into vector components – J0 and J45. Intra-device repeatability and agreements of measurements amongst the devices were evaluated using repeatability coefficients (RCs) and Bland-Altman plots, respectively. RESULTS All devices demonstrated comparable repeatability for Km (p≥0.138). ANTERION had the lowest RC for J0 amongst the devices (p≤0.039). Systematic difference was found for the Km and J0 obtained with IOLMaster500 compared to either SSOCTs (p≤0.010). The ACD and AL measured by IOLMaster500 showed a higher RC compared with either SSOCTs (p<0.002). Systematic difference was found in CCT and ACD between the two SSOCTs (p<0.001), and in AL between ANTERION and IOLMaster500 (p<0.001), with a mean difference of 1.6 µm, 0.022mm and 0.021 mm, respectively. CONCLUSIONS Both SSOCTs demonstrated smaller test-retest variability for measuring ACD and AL compared with IOLMaster500. There were significant disagreement in keratometry and AL measurements between the SSOCTs and PCI-based device; their measurements should not be considered as interchangeable but the disagreement could be refined by readjustment of intraocular lens constant in clinical practice.

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