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Axial biometry

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https://www.readbyqxmd.com/read/28342729/repeatability-and-agreement-of-scheimpflug-based-and-swept-source-optical-biometry-measurements
#1
Saadettin Sel, Jana Stange, Delia Kaiser, Laszlo Kiraly
PURPOSE: To evaluate the repeatability and comparability of biometry parameters between a Scheimpflug-based topography with axial length measurement (Pentacam AXL, Oculus, Wetzlar, Germany) and a swept-source optical biometry (IOLMaster 700, Carl Zeiss Meditec AG, Jena, Germany). METHODS: A total of 50 eyes from 50 adult subjects had biometry measurements in one session three times using the Pentacam AXL and the IOLMaster 700. Keratometry, anterior chamber depth (ACD) and axial length (AL) values were obtained by both devices...
March 22, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28317681/comparison-of-biometry-and-intraocular-lens-power-calculation-performed-by-a-new-optical-biometry-device-and-a-reference-biometer
#2
Bruna V Ventura, Marcelo C Ventura, Li Wang, Douglas D Koch, Mitchell P Weikert
PURPOSE: To compare biometry measurements and intraocular lens (IOL) power calculations obtained by a new optical A-scan interferometer biometer (Galilei G6) (new biometer) and a partial coherence interferometer biometer (IOLMaster 500) (reference biometer). SETTING: Private practice, Recife, Brazil. DESIGN: Retrospective comparative study. METHODS: Cataract patients who had biometric measurements with the new biometer and the reference biometer were included in the study...
January 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28294406/does-transient-increase-in-axial-length-during-accommodation-attenuate-with-age
#3
Deborah S Laughton, Amy L Sheppard, Edward A H Mallen, Scott A Read, Leon N Davies
BACKGROUND: The aim was to profile transient accommodative axial length changes from early adulthood to advanced presbyopia and to determine whether any differences exist between the responses of myopic and emmetropic individuals. METHODS: Ocular biometry was measured by the LenStar biometer (Haag-Streit, Switzerland) in response to zero, 3.00 and 4.50 D accommodative stimuli in 35 emmetropes and 37 myopes, aged 18 to 60 years. All results were corrected to reduce errors arising from the increase in crystalline lens thickness with accommodation...
March 12, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28292775/effectiveness-of-combined-macular-buckle-under-direct-vision-and-vitrectomy-with-ilm-peeling-in-refractory-macular-hole-retinal-detachment-with-extreme-high-axial-myopia-a-24-month-comparative-study
#4
Jin Ma, Honghui Li, Xiaohu Ding, Silvia Tanumiharjo, Lin Lu
PURPOSE: To evaluate the efficacy of a combined macular buckle under direct vision and 23-gauge pars plana vitrectomy (PPV) with internal limiting membrane (ILM) peeling in refractory macular hole retinal detachment (MHRD) with extreme high axial myopia. DESIGN: Prospective, randomised controlled study. PARTICIPANTS: The study included 98 eyes of 98 patients of MHRD with extreme high axial (>30 mm) myopia. INTERVENTION: Patients were randomly assigned to undergo PPV with ILM peeling (group 1, n=52) or PPV with ILM peeling combined with macular buckle under direct vision (group 2, n=46)...
March 14, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28277469/correlation-between-transperineal-3-dimensional-ultrasound-measurements-of-levator-hiatus-and-female-sexual-function
#5
Serdar Aydin, Rabia Zehra Bakar, Çağri Arioğlu Aydin, Seda Ateş
OBJECTIVE: The aim of this study is to investigate the association of sexual functions with levator hiatus biometry measurements and levator ani muscle defect. METHODS: In 62 heterosexual, sexually active premenopausal women without pelvic floor disorders or urinary incontinence, 3-dimensional transperineal ultrasound imaging was used. Two 3-dimensional volumes were recorded, one at rest and one on Valsalva maneuver. Levator biometry measurements and levator defect were evaluated in an axial plane...
March 9, 2017: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/28257833/biometry-characteristics-in-adults-and-children-with-marfan-syndrome-from-the-marfan-eye-consortium-of-chicago
#6
Michael Kinori, Sarah Wehrli, Iris S Kassem, Nathalie F Azar, Irene H Maumenee, Marilyn B Mets
PURPOSE: To report on the biometric findings of adults and children with Marfan syndrome (MFS) recruited from two Annual National Marfan Foundation Conferences (2012, 2015). DESIGN: Cross-sectional study METHODS: Subjects diagnosed as having MFS by Ghent 2 nosology were included for analysis. Subjects were divided into "adults" (≥16 years) and "children" (5-15 years). Biometric data included values for refractive error, axial length (AL), corneal curvature, anterior chamber depth, lens thickness and central corneal thickness...
February 28, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28237427/three-dimensional-eye-shape-myopic-maculopathy-and-visual-acuity-the-zhongshan-ophthalmic-center-brien-holden-vision-institute-high-myopia-cohort-study
#7
Xinxing Guo, Ou Xiao, Yanxian Chen, Huawang Wu, Linxing Chen, Ian G Morgan, Mingguang He
PURPOSE: To investigate the relationship among eye shape, myopic maculopathy, and visual acuity in highly myopic eyes using 3-dimensional (3D) magnetic resonance imaging (MRI). DESIGN: Observational case series. PARTICIPANTS: The study included 190 eyes of 95 participants with bilateral high myopia from the Zhongshan Ophthalmic Center-Brien Holden Vision Institute High Myopia Cohort Study, with spherical power ≤-6.00 diopters (D) in both eyes...
February 22, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28231267/accuracy-of-optical-biometry-combined-with-placido-disc-corneal-topography-for-intraocular-lens-power-calculation
#8
Giacomo Savini, Kenneth J Hoffer, Piero Barboni, Nicole Balducci, Domenico Schiano-Lomoriello, Pietro Ducoli
PURPOSE: To investigate the accuracy of a new optical biometer for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery. METHODS: Consecutive eyes of patients undergoing cataract surgery with the same IOL model were enrolled in a prospective cohort study. Axial length (AL) and corneal power were measured with an optical biometer based on optical low-coherence interferometry and Placido-disc corneal topography. IOL power was calculated with the Hoffer Q, Holladay 1 and SRK/T formulas...
2017: PloS One
https://www.readbyqxmd.com/read/28192795/wide-field-en-face-swept-source-optical-coherence-tomography-features-of-extrafoveal-retinoschisis-in-highly-myopic-eyes
#9
Wei Xiao, Zhuoting Zhu, Capucine Odouard, Ou Xiao, Xinxing Guo, Mingguang He
Purpose: To evaluate the features of extrafoveal retinoschisis (EFRS) in highly myopic eyes detected by swept-source optical coherence tomography (SS-OCT). Methods: In this retrospective case series, 89 eyes of 65 patients with high myopia and coexisting EFRS were included. The participants underwent a comprehensive ophthalmologic examination, including visual acuity, ocular biometry, refraction, and perimetry. Three-dimensional wide-field scans were obtained with SS-OCT, and en face images were reconstructed with custom software...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28182148/retina-and-optic-disc-characteristics-in-amblyopic-and-non-amblyopic-eyes-of-patients-with-myopic-or-hyperopic-anisometropia
#10
Arzu Taşkıran Çömez, Elif Şanal Ulu, Yeliz Ekim
OBJECTIVES: To compare retinal and optic disc characteristics between amblyopic and non-amblyopic eyes in patients with myopic and hyperopic anisometropia measured with optical coherence tomography (OCT). MATERIALS AND METHODS: Patients with myopic (25 patients: 17 female, 8 male; median age 27 years, range 16-40 years) and hyperopic (31 patients: 19 female, 12 male; median age 20 years, range 13-41 years) anisometropic amblyopia were included. Eye examination included determination of best-corrected visual acuity (BCVA) with a Snellen chart, measurement of manifest and cycloplegic refraction after pupillary dilation, alternate cover testing, globe movement evaluation, A-scan biometry for axial length, biomicroscopy, fundus examination, and OCT scanning...
January 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28130351/repeatability-and-agreement-of-ocular-biometry-measurements-aladdin-versus-lenstar
#11
Colm McAlinden, Rongrong Gao, Ayong Yu, Xiaorui Wang, Jing Yang, Ye Yu, Hao Chen, Qinmei Wang, Jinhai Huang
OBJECTIVE: To assess the repeatability and agreement between the Aladdin and Lenstar biometers. METHODS: Three consecutive measurements of the right eye of 102 subjects were acquired by the Aladdin (V.1.1.3) and the Lenstar (V.1.0.3), respectively, with a random order of which biometer to use first. Parameters compared included axial length (AL), anterior chamber depth (ACD), flat keratometry (Kf), steep keratometry (Ks), mean keratometry (Km), J0, J45 and white-to-white (WTW) distance...
January 27, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28114313/the-relationship-between-crystalline-lens-power-and-refractive-error-in-older-chinese-adults-the-shanghai-eye-study
#12
Jiangnan He, Lina Lu, Xiangui He, Xian Xu, Xuan Du, Bo Zhang, Huijuan Zhao, Jida Sha, Jianfeng Zhu, Haidong Zou, Xun Xu
PURPOSE: To report calculated crystalline lens power and describe the distribution of ocular biometry and its association with refractive error in older Chinese adults. METHODS: Random clustering sampling was used to identify adults aged 50 years and above in Xuhui and Baoshan districts of Shanghai. Refraction was determined by subjective refraction that achieved the best corrected vision based on monocular measurement. Ocular biometry was measured by IOL Master...
2017: PloS One
https://www.readbyqxmd.com/read/28107389/effect-of-axial-eye-length-on-retinal-vessel-parameters-in-6-to-12-year-old-malay-girls
#13
Evelyn Li Min Tai, Ling-Jun Li, Wan Hitam Wan-Hazabbah, Tien-Yin Wong, Ismail Shatriah
PURPOSE: Retinal vessel analysis is affected by both systemic and ocular factors. Malays are the major ethnicity in South East Asia. Data on the retinal microvasculature in Malays is limited, especially among children. We aim to evaluate the influence of ocular biometry on retinal vessel parameters in young Malay girls. METHODS: This was a cross-sectional, hospital-based study involving 86 Malay girls aged 6 to 12 years old in Hospital Universiti Sains Malaysia from 2015-2016...
2017: PloS One
https://www.readbyqxmd.com/read/27993483/lens-power-axial-length-to-corneal-radius-ratio-and-association-with-diabetic-retinopathy-in-the-adult-population-with%C3%A2-type-2-diabetes
#14
Jiangnan He, Xian Xu, Jianfeng Zhu, Bijun Zhu, Bo Zhang, Lina Lu, Xiangui He, Xuelin Bai, Xun Xu, Haidong Zou
PURPOSE: To calculate crystalline lens power and to determine the relationship between ocular biometry and diabetic retinopathy (DR) in an adult population with type 2 diabetes mellitus (T2DM). DESIGN: Cross-sectional, population-based study. PARTICIPANTS: Patients with T2DM from the Beixinjing community, Changning district, Shanghai. METHODS: Random clustering sampling was used to identify adults with T2DM in the Beixinjing community...
December 16, 2016: Ophthalmology
https://www.readbyqxmd.com/read/27960581/distribution-of-ocular-component-measures-and-refraction-in-brazilian-school-children
#15
Rodrigo Pessoa Cavalcanti Lira, Carlos Eduardo Leite Arieta, Thaís Helena Moreira Passos, Diana Maziero, Gustavo Lima do Valle Astur, Ítalo Fernandes do Espírito Santo, Ana Cláudia Bertolani, Luis Fernando Pozzi, Rosane Silvestre de Castro, Álvaro Antônio Bandeira Ferraz
PURPOSE: To describe ocular component values and refraction in 6-17-year-old school children in Campinas, Brazil. METHODS: To obtain a representative sample, a total of 1100 6-17-year-old public school students in Campinas, Brazil, were randomly selected and divided into groups according to median ages 6 years (range 5-7 years), 10 years (range 9-11 years), 14 years (range 13-15 years), and 17 years (range 16-18 years). Cycloplegic autorefraction and ocular biometry were performed on each child...
February 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27939559/posterior-vault-distance-of-ciliary-sulcus-implanted-three-piece-intraocular-lenses-according-to-ciliary-sulcus-diameter
#16
Youngsub Eom, Ho Sik Hwang, Jin Young Hwang, Jong Suk Song, Hyo Myung Kim
PURPOSE: To investigate the correlation among preoperative biometry data, postoperative ciliary sulcus diameter, posterior vault distance, and effective lens position of ciliary sulcus-implanted intraocular lenses (IOLs). DESIGN: Retrospective interventional case series. METHODS: Twenty-six eyes of 26 patients underwent phacoemulsification with implantation of a ZA9003 IOL (Abbott Medical Optics Inc, Santa Ana, California, USA) in the ciliary sulcus...
March 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27900479/evaluation-of-the-repeatability-of-a-swept-source-ocular-biometer-for-measuring-ocular-biometric-parameters
#17
Teresa Ferrer-Blasco, Alberto Domínguez-Vicent, José J Esteve-Taboada, Miguel A Aloy, Jose E Adsuara, Robert Montés-Micó
PURPOSE: The purpose was to evaluate the repeatability of a new swept-source optical biometer for measuring ocular biometric parameters. METHODS: Thirty subjects with healthy and phakic eyes were included in this study, and only one eye per participant was analysed. Each eye was measured five times with the IOLMaster 700 swept-source optical biometer (Carl Zeiss Meditec, Jena, Germany). Axial length (AL), anterior chamber depth (ACD), central corneal thickness (CCT), lens thickness (LT), white-to-white (WTW), and K1 and K2 keratometric readings were evaluated...
February 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27898517/comparision-of-optical-low-coherence-reflectometry-versus-ultrasonic-biometry-in-high-hypermetropia
#18
Rukiye Aydin, Sevil Karaman Erdur, Kubra Serefoglu Cabuk, Eyyup Karahan, Suleyman Kaynak
PURPOSE: To compare anterior chamber depth (ACD), axial length (AL), and lens thickness (LT) measurements obtained by the Lenstar LS 900 (Haag-Streit AG) optical low-coherence reflectometry with those obtained by the A-scan contact ultrasound among patients with moderate and high hypermetropia. METHODS: Fifty-two eyes of 52 patients with moderate and high hypermetropia (spherical equivalent of +4 D or more) were examined in this study measurements of ACD, AL, and LT obtained by Lenstar were compared with those obtained by applanation A-scan ultrasound...
November 24, 2016: Eye & Contact Lens
https://www.readbyqxmd.com/read/27863894/precise-measurement-of-scleral-radius-using-anterior-eye-profilometry
#19
Danilo A Jesus, Renata Kedzia, D Robert Iskander
PURPOSE: To develop a new and precise methodology to measure the scleral radius based on anterior eye surface. METHODS: Eye Surface Profiler (ESP, Eaglet-Eye, Netherlands) was used to acquire the anterior eye surface of 23 emmetropic subjects aged 28.1±6.6years (mean±standard deviation) ranging from 20 to 45. Scleral radius was obtained based on the approximation of the topographical scleral data to a sphere using least squares fitting and considering the axial length as a reference point...
February 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/27834467/relation-of-anthropometric-measurements-to-ocular-biometric-changes-and-refractive-error-in-children-with-thalassemia
#20
Rania S Elkitkat, Amany A El-Shazly, Weam M Ebeid, Marwa R Deghedy
PURPOSE: To evaluate and correlate anthropometric, biometric, and refractive error changes in thalassemia major (TM). METHODS: One hundred children with TM and another hundred healthy controls were recruited. Height, weight, body mass index (BMI), and occipitofrontal circumference (OFC) were the anthropometric parameters recorded. Full ophthalmologic examination was performed, including best-corrected visual acuity, cycloplegic refraction, slit-lamp examination, Goldmann applanation tonometry, indirect ophthalmoscopy, keratometry (K readings), and ocular biometry...
November 5, 2016: European Journal of Ophthalmology
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