PURPOSE To evaluate the refractive predictability of a partial coherence interferometry (PCI) biometry device (IOL Master) for cataract surgery and to investigate factors that may affect it. METHODS Retrospective review of 209 eyes from 151 patients that had undergone preoperative PCI biometry and an uneventful phacoemulsification cataract surgery with posterior chamber intraocular lens (IOL)...

OBJECTIVE In a refugee camp on the Thai-Burmese border, accurate dating of pregnancy relies on ultrasound measurements obtained by locally trained health workers. The aim of this study was to substantiate the accuracy of fetal biometry measurements performed by locally trained health workers by comparing derived reference equations with those published for Asian and European hospitals. METHOD...

With the ascendancy of biophysical assessment with Doppler velocimetry, and the establishment of routine scan dating in early pregnancy, there needs to be a radical re-think of the role of ultrasound biometry in the de®nition and assessment of fetal growth restriction (FGR). Doppler ̄ow velocimetry of the umbilical artery has proven its value in de®ning the FGR fetus. It is more useful than card...

OBJECTIVE To describe the variation in ocular biometry and its association with refraction in adult Mongolians. METHODS The study included 1800 subjects, aged 40 years or more, who were selected in two Mongolian provinces-Hövsgöl and Omnögobi-to participate in this population survey. Axial length (AL) and its components, as well as noncycloplegic autorefraction and corneal power (CP), were me...

PURPOSE To describe a new methodology that derives horizontal posterior retinal contours from partial coherence interferometry (PCI) and ray tracing using the corneal topography. METHODS Corneal topography and PCI for seven horizontal visual field eccentricities correspondent to the central 60 degrees of the posterior pole were obtained in 55 myopic eyes. A semicustomized eye model based on t...

Human gait, which is a new biometric aimed to recognize individuals by the way they walk have come to play an increasingly important role in visual surveillance applications. In this paper a novel hybrid holistic approach is proposed to show how behavioural walking characteristics can be used to recognize unauthorized and suspicious persons when they enter a surveillance area. Initially backgro...

EYAL OREN The Network Institute Vrije Universiteit Amsterdam RENAUD DELBRU, MICHELE CATASTA, RICHARD CYGANIAK Digital Enterprise Research Institute National University of Ireland, Galway HOLGER STENZHORN Institute of Medical Biometry and Medical Informatics, University Medical Center Freiburg, Stefan-Meier-Str. 26, 79104 Freiburg, Germany GIOVANNI TUMMARELLO Digital Enterprise Research Institut...

*Biostatistics Branch, National Institute of Environmental Health Sciences, PO Box 12233, Research Triangle Park, North Carolina 27709; †Department of Mathematics and Statistics, Miami University, Oxford, Ohio 45056-1641; ‡Division of Biometry and Risk Assessment, National Center for Toxicological Research, Jefferson, Arkansas 72079; §Analytical Sciences, Inc., Durham, North Carolina 27713; and...

A catalogue record for this book is available from the British Library Library of Congress cataloguing in publication data Shipley, Bill, 1960– Cause and correlation in biology: a user's guide to path analysis, structural equations and causal inference / Bill Shipley. p. cm. ISBN 0 521 79153 7 (hb) 1. Biometry. I. Title.