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Eye biometry

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https://www.readbyqxmd.com/read/28192795/wide-field-en-face-swept-source-optical-coherence-tomography-features-of-extrafoveal-retinoschisis-in-highly-myopic-eyes
#1
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
#2
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
#3
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/28120576/correlations-between-preoperative-angle-parameters-and-postoperative-unpredicted-refractive-errors-after-cataract-surgery-in-open-angle-glaucoma-aod-500
#4
Wonseok Lee, Hyoung Won Bae, Si Hyung Lee, Chan Yun Kim, Gong Je Seong
PURPOSE: To assess the accuracy of intraocular lens (IOL) power prediction for cataract surgery with open angle glaucoma (OAG) and to identify preoperative angle parameters correlated with postoperative unpredicted refractive errors. MATERIALS AND METHODS: This study comprised 45 eyes from 45 OAG subjects and 63 eyes from 63 non-glaucomatous cataract subjects (controls). We investigated differences in preoperative predicted refractive errors and postoperative refractive errors for each group...
March 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28114313/the-relationship-between-crystalline-lens-power-and-refractive-error-in-older-chinese-adults-the-shanghai-eye-study
#5
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
#6
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/28107088/the-national-eye-survey-of-trinidad-and-tobago-nestt-rationale-objectives-and-methodology
#7
Tasanee Braithwaite, Neville Q Verlander, Debra Bartholomew, Petra Bridgemohan, Kevin McNally, Allana Roach, Subash Sharma, Deo Singh, Konrad Pesudovs, Surujpal Teelucksingh, Christine Carrington, Samuel Ramsewak, Rupert Bourne
PURPOSE: This paper describes the rationale, study design and procedures of the National Eye Survey of Trinidad and Tobago (NESTT). The main objective of this survey is to obtain prevalence estimates of vision impairment and blindness for planning and policy development. METHODS: A population-based, cross-sectional survey was undertaken using random multistage cluster sampling, with probability-proportionate-to-size methods. Eligible participants aged 5 years and older were sampled from the non-institutional population in each of 120 cluster segments...
January 20, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28007110/femtosecond-laser-assisted-cataract-surgery-versus-standard-phacoemulsification-cataract-surgery-study-from-the-european-registry-of-quality-outcomes-for-cataract-and-refractive-surgery
#8
Sonia Manning, Peter Barry, Ype Henry, Paul Rosen, Ulf Stenevi, David Young, Mats Lundström
PURPOSE: To compare the visual, refractive, and adverse outcomes of femtosecond laser-assisted cataract surgery and conventional phacoemulsification cataract surgery. SETTING: Cataract surgery clinics in 9 European countries and Australia (femtosecond-assisted) and 18 European countries and Australia (conventional). DESIGN: Multicenter case-control study. METHODS: Eyes having femtosecond laser-assisted cataract surgery were matched to eyes from the European Registry of Quality Outcomes for Cataract and Refractive Surgery phacoemulsification cataract surgery database for preoperative corrected distance visual acuity (CDVA), age, and preoperative risk factors...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28003784/pros-and-cons-of-immediately-sequential-bilateral-cataract-surgery-isbcs
#9
REVIEW
Andrzej Grzybowski, Weronika Wasinska-Borowiec, Charles Claoué
Immediately sequential bilateral cataract surgery (ISBCS) is currently a "hot topic" in ophthalmology. There are well-documented advantages in terms of quicker visual rehabilitation and reduced costs. The risk of bilateral simultaneous endophthalmitis and bilateral blindness is now recognized to be minuscule with the advent of intracameral antibiotics and modern management of endophthalmitis. Refractive surprises are rare for normal eyes and with the use of optical biometry. Where a general anesthetic is indicated for cataract surgery, the risk of death from a second anesthetic is much higher than the risk of blindness...
October 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28002851/prenatal-ultrasonographic-diagnosis-of-cataract-in-utero-manifestations-of-cryptic-disease
#10
Eran Ashwal, Asaf Achiron, Yinon Gilboa, Michal Berkenstadt, Mordecai Rosner, Reuven Achiron
Purpose To report and review our experience with antenatal evaluation for fetuses diagnosed with congenital cataract. Materials and Methods We retrospectively identified pregnancies diagnosed with fetal cataract during antenatal ultrasound. Evaluation of fetal eyes included intraocular anatomy and biometry. Data on fetal malformations, serology and fetal karyotype were collected. Results 8 cases, identified over the course of 10 years, were reviewed. Week 15 was the mean time for diagnosis (range 11 - 34)...
December 21, 2016: Ultraschall in der Medizin
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
#11
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/27990622/refractive-outcome-of-combined-phacoemulsification-and-endoscopic-cyclophotocoagulation
#12
S Kang, S Luk, H Han, M F Cordeiro, F Ahmed, P Bloom, L Crawley
PURPOSE: To compare the refractive outcome of eyes that underwent phacoemulsification combined with endoscopic cyclophotocoagulation (phaco-ECP) with the eyes that underwent phacoemulsification alone. METHODS: A retrospective case series review of 103 consecutive eyes that underwent phaco-ECP and 62 eyes that underwent phacoemulsification between January 2006 and August 2012 was conducted. Post-operative refractive outcomes were obtained by subjective refraction or autorefraction...
December 19, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27956289/pterygium-size-and-effect-on-intraocular-lens-power-calculation
#13
Mustafa Koc, Mehmet Murat Uzel, Emre Aydemir, Fuat Yavrum, Pinar Kosekahya, Pelin Yılmazbaş
PURPOSE: To evaluate the effects of pterygium on biometry measurements and the relationship between these effects and pterygium size. SETTING: Ulucanlar Eye Hospital, Ankara, Turkey. DESIGN: Prospective comparative study. METHODS: Patients who had unilateral primary pterygium excision were included in the study group. Anterior segment photographed images were taken of eyes with pterygia to calculate the pterygium length and area using the ImageJ program...
November 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/27939559/posterior-vault-distance-of-ciliary-sulcus-implanted-three-piece-intraocular-lenses-according-to-ciliary-sulcus-diameter
#14
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 who underwent phacoemulsification with implantation of a ZA9003 IOL (Abbott Medical Optics Inc., Santa Ana, CA, USA) in the ciliary sulcus. We analyzed correlations among preoperative biometry data and ultrasound biomicroscopy measurements, ciliary sulcus diameter, posterior vault distance, and effective lens position...
December 6, 2016: 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
#15
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
#16
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
#17
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/27862797/ocular-biometry-by-computed-tomography-in-different-dog-breeds
#18
Carolin L H Chiwitt, Stephen J Baines, Paul Mahoney, Andrew Tanner, Christine L Heinrich, Michael Rhodes, Heidi J Featherstone
OBJECTIVE: To (i) correlate B-mode ocular ultrasound (US) and computed tomography (CT) (prospective pilot study), (ii) establish a reliable method to measure the normal canine eye using CT, (iii) establish a reference guide for some dog breeds, (iv) compare eye size between different breeds and breed groups, and (v) investigate the correlation between eye dimensions and body weight, gender, and skull type (retrospective study). PROCEDURE: B-mode US and CT were performed on ten sheep cadaveric eyes...
November 11, 2016: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/27843285/clinical-outcomes-with-toric-intraocular-lenses-planned-using-an-optical-low-coherence-reflectometry-ocular-biometer-with-a-new-toric-calculator
#19
Kjell G Gundersen, Richard Potvin
PURPOSE: To prospectively evaluate postoperative clinical outcomes with implantation of toric intraocular lenses (IOLs) using preoperative keratometry from an optical low coherence reflectometry (OLCR) ocular biometer (Lenstar(®) LS900) and the built-in Barrett toric calculator. PATIENTS AND METHODS: A prospective observational study recruited one or both eyes of subjects who underwent uncomplicated cataract surgery with toric IOL implantation using OLCR biometery data and the Barrett toric IOL calculator for toric IOL planning...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27833928/comparison-of-a-new-optical-biometer-and-a-standard-biometer-in-cataract-patients
#20
Pipat Kongsap
BACKGROUND: Cataract surgery is the most common surgical procedure in ophthalmology. Biometry data and accurate intraocular lens (IOL) calculations are very important in achieving the desired refractive outcomes. The aim of this study was to compare measurements using a new optical low coherence reflectometry (OLCR) biometer (OA-2000) and the gold standard partial coherence interferometry (PCI) optical biometer (IOLMaster 500). METHODS: Ocular biometry of cataract patients were measured by the OA-2000 and IOLMaster 500 to compare keratometry (K), axial length (AL), anterior chamber depth (ACD), white-to-white (WTW) diameter, and IOL power using the SRK/T formula...
2016: Eye and Vision (London, England)
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