Results 21 to 30 of about 1,752,631 (186)

Validation of a partial coherence interferometry method for estimating retinal shape. [PDF]

Biomed Opt Express, 2015
To validate a simple partial coherence interferometry (PCI) based retinal shape method, estimates of retinal shape were determined in 60 young adults using off-axis PCI, with three stages of modeling using variants of the Le Grand model eye, and magnetic resonance imaging (MRI).
Verkicharla PK, Suheimat M, Pope JM, Sepehrband F, Mathur A, Schmid KL, Atchison DA.   +6 more
europepmc   +6 more sources

Comparison of anterior segment measurements using rotating Scheimpflug imaging and partial coherence interferometry [PDF]

International Journal of Ophthalmology, 2013
METHODS:As part of the first phase of Shahroud Eye Cohort Study with 5 190 subjects of 40 to 64 years of age, CCT and ACD were measured using Scheimpflug imaging with the Pentacam (Oculus, Inc., Lynnwood, WA, USA) and partial coherence interferometry ...
Akbar Fotouhi, Mohammad Shariati, Mohammad Hassan Emamian, Mehdi Khabazkhoob, Mohammad Soleimani, Hassan Hashemi, Shiva Mehravaran   +6 more
doaj   +2 more sources

Meta-analysis of optical low-coherence reflectometry versus partial coherence interferometry biometry. [PDF]

Sci Rep, 2017
AbstractA meta-analysis to compare ocular biometry measured by optical low-coherence reflectometry (Lenstar LS900; Haag Streit) and partial coherence interferometry (the IOLMaster optical biometer; Carl Zeiss Meditec). A systematic literature search was conducted for articles published up to August 6th 2015 in the Cochrane Library, PubMed, Medline ...
Huang J, McAlinden C, Huang Y, Wen D, Savini G, Tu R, Wang Q.   +6 more
europepmc   +5 more sources

Numerical dispersion compensation for Partial Coherence Interferometry and Optical Coherence Tomography

Optics Express, 2001
Dispersive samples introduce a wavelength dependent phase distortion to the probe beam. This leads to a noticeable loss of depth resolution in high resolution OCT using broadband light sources. The standard technique to avoid this consequence is to balance the dispersion of the sample byarrangingadispersive materialinthereference arm.
Theo Lasser, Christoph K. Hitzenberger, Robert J. Zawadzki   +2 more
exaly   +3 more sources

Comparison of Partial Coherence Interferometry and Optic Low Coherence Reflectometry for Intraocular Lens Power Calculation in Cataract Patients

Türk Oftalmoloji Dergisi, 2014
Objectives: To compare the measurements obtained by partial coherence interferometry (PCI) (AL Scan, Nidek) and optical low coherence reflectometry (OLCR) (Lenstar, Haag-Streit AG) and to evaluate the inter-device differences with respect to deviation ...
Mustafa Doğan, Onur Polat, Mahmut Karadaş, Tuncay Küsbeci, Güliz Fatma Yavaş, Sibel İnan, Ümit Übeyt İnan   +6 more
doaj   +2 more sources

Comparison of Biometry Measurements Using Standard Partial Coherence Interferometry versus New Scheimpflug Tomography with Integrated Axial Length Capability [PDF]

Clinical Ophthalmology, 2020
Jorge Selem Haddad,1,2 Eliza Barnwell,1 Karolinne Maia Rocha,1 Renato Ambrosio Jr,2,3 George O Waring IV4 1Storm Eye Institute, Medical University of South Carolina, Charleston, SC, USA; 2Universidade Federal de São Paulo, São Paulo, Brazil;
Haddad JS, Barnwell E, Rocha KM, Ambrosio Jr R, Waring IV GO   +4 more
doaj   +2 more sources

Can Partial Coherence Interferometry be Used to Determine Retinal Shape? [PDF]

Optometry and Vision Science, 2011
ABSTRACT Purpose. To determine likely errors in estimating retinal shape using partial coherence interferometric instruments when no allowance is made for optical distortion. Methods.
Atchison, David, Charman, W
openaire   +4 more sources

Comparison of measurements and calculated lens power using three biometers: a Scheimpflug tomographer with partial coherence interferometry and two swept source optical coherence tomographers [PDF]

BMC Ophthalmology
Purpose To compare the biometric measurements obtained from the Pentacam AXL Wave, IOLMaster 700, and ANTERION and calculate the recommended intraocular lens power using the Barrett Formulae.
Robert Edward T. Ang, Benedict L. Estolano, Paulo Hector C. Luz, Maria Isabel N. Umali, Michelle Marie Q. Araneta, Emerson M. Cruz   +5 more
doaj   +2 more sources

Comparison of a swept-source optical coherence tomograph device (MT9000) to a partial coherence interferometry-based biometer (IOLMaster 500) in a high-altitude environment [PDF]

Scientific Reports
To evaluate the agreement of biometry parameters of cataract patients between MT9000 (Vision Micro Image (Henan) Technology Co., Ltd.) and IOLMaster 500 (Carl Zeiss Meditec, Jena, Germany) in a high-altitude environment. A total of 145 eyes from the high-
Yonglin Chen, Rong Hu, Yongguo Xiang, Hong Cheng, Liang Liang, Juan Kang, Shuren Pan, Ke Hu, Shijie Zheng   +8 more
doaj   +2 more sources

Dispersion effects in partial coherence interferometry: implications for intraocular ranging

Journal of Biomedical Optics, 1999
In nondispersive media, the minimum distance that can be resolved by partial coherence interferometry (PCI) and optical coherence tomography (OCT) is inversely proportional to the source spectral bandwidth. Dispersion tends to increase the signal width and to degrade the resolution.
Wolfgang Drexler, Christoph K. Hitzenberger, Adolf Friedrich Fercher   +2 more
exaly   +3 more sources