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Axial biometry

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https://www.readbyqxmd.com/read/28639087/haigis-and-srkt-formulae-accuracy-for-intentional-myopic-overcorrection
#1
Rodrigo Faeda Dalto, Miriam A Ferreira, Wilian Queiroz, Roberto Pinto Coelho, Jayter Silva Paula, Andre Messias
PURPOSE: To investigate the influence of preoperative biometric parameters on the accuracy of Haigis and SRKT formulae in predicting postoperative target refraction. METHODS: Retrospective analysis of 108 eyes (70 patients) underwent uneventful phacoemulsification surgery with implant of Alcon-SN60WF intraocular lens (IOL). Forty-five eyes were intentionally targeted to myopia (-0.75 to -1.25 dpt), while the others targeted between 0 and -0.75 dpt. Preoperative axial length and keratometry (K) were measured with optical biometry (LENSTAR-Haag-Streit)...
June 21, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28622398/axial-length-variation-impacts-on-superficial-retinal-vessel-density-and-foveal-avascular-zone-area-measurements-using-optical-coherence-tomography-angiography
#2
Danuta M Sampson, Peijun Gong, Di An, Moreno Menghini, Alex Hansen, David A Mackey, David D Sampson, Fred K Chen
Purpose: To evaluate the impact of image magnification correction on superficial retinal vessel density (SRVD) and foveal avascular zone area (FAZA) measurements using optical coherence tomography angiography (OCTA). Methods: Participants with healthy retinas were recruited for ocular biometry, refraction, and RTVue XR Avanti OCTA imaging with the 3 × 3-mm protocol. The foveal and parafoveal SRVD and FAZA were quantified with custom software before and after correction for magnification error using the Littman and the modified Bennett formulae...
June 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28569566/ocular-biometry-and-determinants-of-refractive-error-in-a-founder-population-of-european-ancestry
#3
Sarah M Hilkert, Reut Parness-Yossifon, Rebecca Mets-Halgrimson, Marilyn B Mets
BACKGROUND: The prevalence of myopia is increasing worldwide. Previous studies have found a positive association between myopia, education, and near activities, while others have noted a negative association with outdoor exposure. This study reports refractive error and biometry in a founder population of European ancestry, the Hutterites, and discusses risk factors contributing to myopia. METHODS: Cross-sectional study, including complete eye exams with retinoscopy and biometry...
June 1, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28532936/intraoperative-aberrometry-versus-preoperative-biometry-for-intraocular-lens-power-selection-in-axial-myopia
#4
Darren C Hill, Shruti Sudhakar, Christopher S Hill, Tonya S King, Ingrid U Scott, Brett B Ernst, Seth M Pantanelli
PURPOSE: To compare the accuracy of intraoperative wavefront aberrometry (ORA) and the Hill-radial basis function (RBF) formula with other formulas based on preoperative biometry in predicting residual refractive error after cataract surgery in eyes with axial myopia. SETTING: Private practice, Harrisburg, Pennsylvania, USA. DESIGN: Retrospective consecutive case series. METHODS: Eyes with an axial length (AL) greater than 25...
April 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28464806/the-effect-of-ocular-biometric-factors-on-the-accuracy-of-various-iol-power-calculation-formulas
#5
Jinho Jeong, Han Song, Jimmy K Lee, Roy S Chuck, Ji-Won Kwon
BACKGROUND: To evaluate how differences in ocular biometry affects the Hoffer Q, Holladay 1, SRK/T, and Haigis intraocular lens power calculation formulae predictions. METHODS: This study was performed on 91 eyes of 91 patients who underwent uneventful cataract surgery. Ocular biometry values were measured using the IOL Master 500, and intraocular lens (IOL) power was calculated using the Haigis, Hoffer Q, Holladay 1, and SRK/T formulas. We calculated the expected difference (ED) of each 3rd generation formula from the Haigis formula by subtracting the predicted refraction of the Haigis formula from the predicted refraction of each 3rd generation formula...
May 2, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28448513/outdoor-activity-and-myopia-progression-in-4-year-follow-up-of-chinese-primary-school-children-the-beijing-children-eye-study
#6
Yin Guo, Li Juan Liu, Ping Tang, Yan Yun Lv, Yi Feng, Liang Xu, Jost B Jonas
PURPOSE: To investigate factors associated with ocular axial elongation and myopia progression during a 4-year follow-up in primary school children in Beijing. METHODS: This school-based study included 382 grade-1 children at baseline in 2011 (age:6.3±0.4 years) with 305 (79.8%) returning for the follow-up examination in 2015. At baseline and in yearly follow-up examinations, the children underwent a comprehensive eye examination including auto-refractometry, ocular biometry with measurement of axial length, and fundus photography...
2017: PloS One
https://www.readbyqxmd.com/read/28446167/evaluation-of-biometry-and-corneal-astigmatism-in-cataract-surgery-patients-from-central-china
#7
Ji-Guo Yu, Jie Zhong, Zhong-Ming Mei, Fang Zhao, Na Tao, Yi Xiang
BACKGROUND: To evaluate the distribution of biometric parameters and corneal astigmatism using the IOLMaster device before phacoemulsification in cataract patients in Central China. METHODS: Consecutive cataract patients were recruited at the Central Hospital of Wuhan between January 2015 and June 2016. Ocular axial length (AL), keratometry values, anterior chamber depth (ACD) and horizontal corneal diameter (white to white [WTW]) of each cataract-affected eye were measured with the IOLMaster device...
April 26, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28402713/optical-biometry-derived-axial-length-measurements-following-intravitreal-anti-vascular-endothelial-growth-factor-treatment-for-macular-edema
#8
George D Kymionis, Athanassios Giarmoukakis, Ioanna K Apostolidi, Styliani V Blazaki, Konstantinos I Tsoulnaras, Joanna Moschandrea, Sofia Panagopoulou, Miltiadis K Tsilimbaris
PURPOSE: To evaluate axial length (AL) alterations in patients with macular disease over the course of intravitreal anti-vascular endothelial growth factor (anti-VEGF) treatment. METHODS: In this prospective, comparative study, 33 patients with macular edema underwent unilaterally intravitreal anti-VEGF therapy and were followed for two months; the contralateral eyes were considered as controls. Central retinal thickness (CRT) was measured with spectral-domain optical coherence tomography and AL with an IOL-Master optical biometer...
April 12, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/28366366/clinical-and-biometric-determinants-of-actual-lens-position-after-cataract-surgery
#9
Julien Plat, Didier Hoa, Frederic Mura, Timothe Busetto, Christelle Schneider, Arnaud Payerols, Max Villain, Vincent Daien
PURPOSE: To evaluate the preoperative clinical and biometric determinants associated with the actual lens position after cataract surgery. SETTING: Department of Ophthalmology, University Hospital of Montpellier, France. DESIGN: Prospective longitudinal cohort study. METHODS: The data collected included clinical factors (age, sex, history of vitrectomy) and biometry factors (axial length [AL], anterior chamber depth [ACD], lens thickness, white-to-white [WTW] distance) that might affect actual lens position...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28357135/circumferential-silicone-sponge-scleral-buckling-induced-axial-length-changes-case-series-and-comparison-to-literature
#10
Shira Sheen Ophir, Asaf Friehmann, Alexander Rubowitz
BACKGROUND: This study compared axial length changes induced by circumferential scleral buckling using a silicone sponge with literature reports for solid silicone rubber. METHODS: Records of patients treated with scleral buckling in 2009-2013 using a silicone sponge, with preoperative axial length biometry measurements were reviewed. Additional information included age, type of surgery, additional surgeries, phakic status and anatomical success of reattachment...
2017: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/28342729/repeatability-and-agreement-of-scheimpflug-based-and-swept-source-optical-biometry-measurements
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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 2 annual National Marfan Foundation conferences (2012 and 2015). DESIGN: Cross-sectional study. METHODS: Subjects diagnosed with MFS by Ghent 2 nosology were included for analysis. Subjects were divided into "adults" (≥16 years of age) and "children" (5-15 years of age). Biometric data included values for refractive error, axial length (AL), corneal curvature, anterior chamber depth, lens thickness, and central corneal thickness...
May 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
#17
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...
May 2017: Ophthalmology
https://www.readbyqxmd.com/read/28231267/accuracy-of-optical-biometry-combined-with-placido-disc-corneal-topography-for-intraocular-lens-power-calculation
#18
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
#19
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
#20
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
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