Results 161 to 170 of about 15,879 (217)

Tear film characteristics in French bulldogs vs. non-brachycephalic dogs. [PDF]

Front Vet Sci
Spornberger J, Soukup P, Meyer-Lindenberg A, Allgoewer I.   +3 more
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Partial coherence interferometry in a teaching hospital

Journal of Cataract and Refractive Surgery, 2009
Partial coherence interferometry (PCI) has an 8% to 22% failure rate for a variety of reasons such as mature cataract, inability to fixate secondary to macular degeneration, tremor, keratopathy, nystagmus, and vitreous hemorrhage. The new composite IOLMaster version 5 software has demonstrated a failure rate of 7.4%, primarily because of posterior ...
Leslie A, Wei, Nickolas, Katsoulakis, Theodoros, Filippopoulos, Paul B, Greenberg   +3 more
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Partially multiplexing sensor network exploiting low coherence interferometry

Applied Optics, 1993
A partially multiplexed fiber-optic-based sensor network based on low coherence interferometry is reported for which the scanning interferometer simultaneously sweeps the coherence-matched region of each sensor. The advantage of this approach is that the signal-to-noise ratio is maximized while the cross talk between sensors is minimized.
T Y, Liu, J, Cory, D A, Jackson
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Intraocular Lens Power Measured by Partial Coherence Interferometry

Optometry and Vision Science, 2012
To compare the accuracy of the intraocular lens (IOL) power calculation of the Zeiss IOLMaster versus conventional automated keratometry and contact acoustic biometry after personalized optimization.Three hundred twenty eyes of 249 patients consecutively receiving phacoemulsification and IOL implantation with the sutureless clear cornea approach were ...
Yi-Ting, Hsieh, I-Jong, Wang
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Speckle interferometry by partial coherent beam

SPIE Proceedings, 2003
By using new theoretical point of view on cross-spectral density function of the field, the propagation of partially coherent beam produce by a plane source is investigated. Then we show, experimentally, the coherence length in the source plane can be measured directly from the far zone intensity distribution.
H. Tajalli, M. Sahrai, D. Jafari
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Off‐axis partial coherence interferometry in myopes and emmetropes

Ophthalmic and Physiological Optics, 2012
AbstractPurposeThis study describes the axial and peripheral dimensions of myopic and emmetropic eyes in a wide range of retinal locations using a non‐contact optical biometer (Zeiss IOLMaster) based upon the principle of partial coherence interferometry.
Asieh, Ehsaei, Catharine M, Chisholm, Ian E, Pacey, Edward A H, Mallen   +3 more
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Eye-length measurement by interferometry with partially coherent light

Optics Letters, 1988
With a multimode semiconductor laser we have been able to measure the optical length of the eye within a precision of 0.03 mm. A first series of in vivo measurements acoustically determined eye length.
A F, Fercher, K, Mengedoht, W, Werner
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Immersion A-scan compared with partial coherence interferometry

Journal of Cataract and Refractive Surgery, 2002
To compare 2 methods of axial length measurement, immersion ultrasonography and partial coherence interferometry, and to elucidate surgical outcomes based on immersion measurements.Oregon Eye Institute, Eugene, Oregon, USA.Axial length measurements in 50 cataractous eyes were obtained by optical biometry (IOLMaster, Zeiss Humphrey Systems) and ...
Mark, Packer, I Howard, Fine, Richard S, Hoffman, Peggy G, Coffman, Laurie K, Brown   +4 more
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Accuracy and reproducibility of biometry using partial coherence interferometry

Journal of Cataract and Refractive Surgery, 2002
To determine whether partial coherence interferometry is comparable to standard contact ultrasonic biometry in accuracy, reproducibility, and ease of use.Academic university practice.In this prospective study, simultaneous biometry was performed in 91 consecutive patients (111 eyes) using partial coherence interferometry (IOLMaster, Zeiss Humphrey ...
Rafe, Connors, Peter, Boseman, Randall J, Olson   +2 more
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Biometry combining Scheimpflug imaging and partial coherence interferometry versus standard partial coherence interferometry biometry

Journal Français d'Ophtalmologie
To compare measurements of mean keratometry (K), axial length (AL), Jackson first and second astigmatism vector (J0 and J45), astigmatism magnitude, white-to-white (WTW) diameter and anterior chamber depth (ACD) values between two biometers, the Pentacam® AXL and the IOL Master 500.Public hospital in Belgium.Retrospective instrument reliability ...
V.E.W.C.M. van Renterghem, F.-X. Crahay
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