Results 181 to 190 of about 15,879 (217)

Partial coherence interferometry: a novel approach to biometry in cataract surgery

American Journal of Ophthalmology, 1998
To compare biometry performed by an enhanced version of dual beam partial coherence interferometry and applanation ultrasound in a prospective study of 85 cataract eyes to improve refractive outcome of cataract surgery due to a more accurate calculation of intraocular lens power.The SRK II formula using ultrasound biometry data was employed.
W, Drexler, O, Findl, R, Menapace, G, Rainer, C, Vass, C K, Hitzenberger, A F, Fercher   +6 more
openaire   +2 more sources

Accuracy of a new partial coherence interferometry analyser for biometric measurements

British Journal of Ophthalmology, 2009
Precise biometry is an essential preoperative measurement for refractive surgery as well as cataract surgery. A new device based on partial coherence interferometry technology was tested and evaluated for accuracy of measurements.In a prospective study 200 eyes of 100 healthy phakic volunteers were examined with a functional prototype of the new ...
M P, Holzer, M, Mamusa, G U, Auffarth
openaire   +2 more sources

Axial Length Measurement Failure Rates With Biometers Using Swept-Source Optical Coherence Tomography Compared to Partial-Coherence Interferometry and Optical Low-Coherence Interferometry

American Journal of Ophthalmology, 2017
To compare a new swept-source optical coherence tomography (SSOCT)-based biometer (OA-2000) with the IOLMaster v5.4 (partial-coherence interferometry) and Aladdin (optical low-coherence interferometry) biometers in terms of axial length measurement and failure rate in eyes with cataract.Reliability study.A total of 377 eyes of 210 patients were scanned
Colm, McAlinden, Qinmei, Wang, Rongrong, Gao, Weiqi, Zhao, Ayong, Yu, Yu, Li, Yan, Guo, Jinhai, Huang   +7 more
openaire   +2 more sources

Multicenter study of optical low-coherence interferometry and partial-coherence interferometry optical biometers with patients from the United States and China

Journal of Cataract and Refractive Surgery, 2016
To evaluate the agreement between the measurements provided by a new optical biometer, the Aladdin, based on optical low-coherence interferometry (OLCI), and those provided by the most commonly used optical biometer (IOLMaster 500), based on partial-coherence interferometry (PCI).Multicenter clinical trial.Prospective evaluation of diagnostic test.In ...
Kenneth J, Hoffer, H John, Shammas, Giacomo, Savini, Jinhai, Huang   +3 more
openaire   +2 more sources

Resolution of partially coherent objects by use of speckle interferometry*

Journal of the Optical Society of America, 1974
The method of obtaining near-diffraction-limited information by averaging the modulus-squared Fourier-transformed radiant-flux density is applied to partially coherent light. The case of two point sources with arbitrary coherence properties and intensities is considered in detail.
M. G. Miller, D. Korff
openaire   +1 more source

Dispersion induced multiple signal peak splitting in partial coherence interferometry

Optics Communications, 1998
Abstract Dispersion is known to increase the width of the coherence envelope and therefore to decrease the resolution in partial coherence interferometry (PCI). If the thickness of a thin foil located behind a dispersive medium is to be measured, a further effect occurs.
C.K. Hitzenberger, A. Baumgartner, A.F. Fercher   +2 more
openaire   +1 more source

Partially coherent illumination in lateral shearing interferometry

2018
This thesis discusses the influence of a special spatially extended light source in lateral shearing interferometry, both in the two-beam case and for speckle interferometry. In particular, the use of diffractive elements is emphasized, whereby intrinsic errors of the experimental setups can be kept low and at the same time a high degree of flexibility
openaire   +1 more source

Comparison of AL-Scan and IOLMaster 500 Partial Coherence Interferometry Optical Biometers

Journal of Refractive Surgery, 2016
PURPOSE: To investigate agreement between the ocular biometry measurements provided by a newer optical biometer, the AL-Scan (Nidek Co, Ltd., Gamagori, Japan) and those provided by the IOLMaster 500 (Carl Zeiss Meditec, Jena Germany), which are both based on partial coherence interferometry ...
Kenneth J, Hoffer, Giacomo, Savini
openaire   +2 more sources

Comparing Immersion Ultrasound With Partial Coherence Interferometry for Intraocular Lens Power Calculation

Ophthalmic Surgery, Lasers and Imaging Retina, 2008
Background and Objective: To compare the utility and accuracy of high-precision immersion ultrasound, partial coherence interferometry, and the IOL Master system (Carl Zeiss Meditec, Dublin, CA) in a tertiary care referral center.
Julio, Narváez, D Hunter, Cherwek, R Doyle, Stulting, Rhonda, Waldron, Grenith J, Zimmerman, Izak F, Wessels, George O, Waring   +6 more
openaire   +2 more sources

Reproducibility of optical biometry using partial coherence interferometry: intraobserver and interobserver reliability

Journal of Cataract and Refractive Surgery, 2001
To evaluate the intraobserver and interobserver variability in axial length (AL), anterior chamber depth (ACD), and corneal radius measurements using an optical biometry instrument based on partial coherence interferometry (PCI).Johannes Gutenberg University, Mainz, Germany.In this observational case series and interobserver reliability trial, 30 ...
A, Vogel, H B, Dick, F, Krummenauer
openaire   +2 more sources