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https://www.readbyqxmd.com/read/29770644/comparative-efficacy-of-the-new-optical-biometer-on-intraocular-lens-power-calculation-al-scan-versus-iolmaster
#1
Ahnul Ha, Won Ryang Wee, Mee Kum Kim
PURPOSE: To evaluate the agreement in axial length (AL), keratometry, and anterior chamber depth measurements between AL-Scan and IOLMaster biometers and to compare the efficacy of the AL-Scan on intraocular lens (IOL) power calculations and refractive outcomes with those obtained by the IOLMaster. METHODS: Medical records of 48 eyes from 48 patients who underwent uneventful phacoemulsification and IOL insertion were retrospectively reviewed. One of the two types of monofocal aspheric IOLs were implanted (Tecnis ZCB00 [Tecnis, n = 34] or CT Asphina 509M [Asphina, n = 14])...
May 15, 2018: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/29765196/optical-coherence-tomography-retinal-nerve-fiber-layer-analysis-in-eyes-with-long-axial-lengths
#2
Sagar B Patel, Nisha Reddy, Xihui Lin, Jess T Whitson
Purpose: To evaluate the relationship between axial length (AL) and retinal nerve fiber layer (RNFL) profile and to characterize differences in optical coherence tomography RNFL of myopic glaucomatous eyes compared to nonglaucomatous eyes. Methods: Retrospective chart review of 170 eyes of 89 subjects with optical biometry and optical coherence tomography RNFL assessment was conducted. Results: Temporal RNFL thickness showed no association with AL in either glaucomatous or nonglaucomatous eyes...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29736407/investigating-the-impact-of-preoperative-corneal-astigmatism-orientation-on-the-postoperative-spherical-equivalent-refraction-following-intraocular-lens-implantation
#3
Richard N McNeely, Salissou Moutari, Eric Pazo, Jonathan E Moore
Background: To investigate the impact of the orientation of preoperative corneal astigmatism on achieving the postoperative target refraction following monofocal intraocular lens (IOL) implantation. Methods: This study enrolled 339 eyes who had uneventful cataract surgery or refractive lens exchange (RLE) with subsequent monofocal IOL implantation. Eyes were initially categorized dependent upon axial length and then on the orientation of preoperative anterior corneal astigmatism...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29700651/comparison-of-anterior-segment-parameters-and-axial-length-measurements-performed-on-a-scheimpflug-device-with-biometry-function-and-a-reference-optical-biometer
#4
Maria Muzyka-Woźniak, Adam Oleszko
PURPOSE: To compare measurements of axial length (AL), corneal curvature (K), anterior chamber depth (ACD) and white-to-white (WTW) distance on a new device combining Scheimpflug camera and partial coherence interferometry (Pentacam AXL) with a reference optical biometer (IOL Master 500). To evaluate differences between IOL power calculations based on the two biometers. METHODS: Ninety-seven eyes of 97 consecutive cataract or refractive lens exchange patients were examined preoperatively on IOL Master 500 and Pentacam AXL units...
April 26, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29692930/refraction-and-ocular-biometry-of-preschool-children-in-shanghai-china
#5
Luoli Zhang, Xiangui He, Xiaomei Qu, Xiaofang You, Bingjie Wang, Huijing Shi, Hui Tan, Haidong Zou, Jianfeng Zhu
Purpose: To investigate the refraction and ocular biometry characteristics and to examine the prevalence of refractive errors in preschool children aged 3 to 6 years in Shanghai, China. Methods: A school-based cross-sectional study was conducted in Jiading and Xuhui District, Shanghai, in 2013. We randomly selected 7 kindergartens in Jiading District and 10 kindergartens in Xuhui District, with a probability proportionate to size. The children underwent comprehensive eye examinations, including cycloplegic refraction and biometric measurements...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29691923/the-interaction-between-homatropine-and-optical-blur-on-choroidal-thickness
#6
Beata P Sander, Michael J Collins, Scott A Read
PURPOSE: To analyse the short-term interaction between a short period of myopic and hyperopic defocus and the muscarinic antagonist homatropine upon the choroidal thickness and ocular biometrics of healthy subjects. METHODS: Thirty young adults (15 myopes and 15 emmetropes) aged 18-35 years had subfoveal choroidal thickness (ChT) and ocular biometry measurements taken before, 30 min, and 60 min following the introduction of monocular optical blur (0.00 D, +3...
May 2018: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/29665792/ocular-biometric-characteristics-of-cataract-patients-in-western-china
#7
Qing Huang, Yongzhi Huang, Qu Luo, Wei Fan
BACKGROUND: We aimed to measure ocular biometric characteristics in older cataract patients from western China. METHODS: Ocular biometry records were retrospectively analyzed for 6933 patients with cataracts (6933 eyes) at least 50 years old who were treated at West China Hospital of Sichuan University. RESULTS: Partial coherence laser interferometry gave the following population averages: axial length (AL), 24.32 ± 2.42 mm; anterior chamber depth (ACD), 3...
April 17, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29625487/parapapillary-gamma-zone-and-progression-of-myopia-in-school-children-the-beijing-children-eye-study
#8
Yin Guo, Li Juan Liu, Ping Tang, Yi Feng, Yan Yun Lv, Min Wu, Liang Xu, Jost B Jonas
Purpose: To assess the development and enlargement of the parapapillary gamma zone in school children. Methods: This school-based prospective longitudinal study included Chinese children attending grade 1 in 2011 and returning for yearly follow-up examinations until 2016. These examinations consisted of a comprehensive ocular examination with biometry and color fundus photographs. The parents underwent a standardized interview. The parapapillary gamma zone was defined as the area with visible sclera at the temporal optic disc margin, and the optic disc itself was measured on fundus photographs...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29615113/intraocular-lens-power-calculation-for-the-equine-eye
#9
Ulrike Meister, Christiane Görig, Christopher J Murphy, Hubertus Haan, Bernhard Ohnesorge, Michael H Boevé
BACKGROUND: Phacoemulsification and intraocular lens (IOL) implantation during cataract surgery in horses occur with increasing frequency. To reduce the postoperative refractive error it is necessary to determine the proper IOL power. In the present study retinoscopy, keratometry and ultrasonographic biometry were performed on 98 healthy equine eyes from 49 horses. The refractive state, corneal curvature (keratometry) and the axial location of all optical interfaces (biometry) were measured...
April 3, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29561500/optic-disc-features-in-highly-myopic-eyes-the-zoc-bhvi-high-myopia-cohort-study
#10
Zhixi Li, Xinxing Guo, Ou Xiao, Pei Ying Lee, Ran Liu, Decai Wang, Padmaja Sankaridurg, Mingguang He
SIGNIFICANCE: Some studies reported that optic disc tilt and rotation might be risk factors for the susceptibility of high myopic eyes to develop glaucoma. However, data regarding optic disc manifestations in high myopia participants are few. It is crucial to characterize the features of optic disc manifestations among high myopes. PURPOSE: To describe optic disc characteristics of Chinese highly myopic eyes and to investigate associated factors. METHODS: This cross-sectional, observational study included 890 Chinese with bilateral high myopia (defined as ≤-6...
March 21, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29557836/glaucoma-with-crouzon-syndrome
#11
Abdulaziz Anazi Alshamrani, Sami Al-Shahwan
BACKGROUND: Crouzon syndrome is the most common form of craniosynostosis, and mutations in the fibroblast growth factor receptor 2 and 3 (FGFR2 and FGFR3) genes are implicated in its pathogenesis. OBSERVATION: A 10-year-old female patient with Crouzon syndrome and congenital glaucoma treated with trabeculectomy and ocular hypotensive medications was examined. The patient had proptosis, exposure keratopathy, megalocornea, thin central corneal thickness, a shallow anterior chamber, mild anterior subcapsular cataract, and a cup-to-disc ratio of 0...
March 19, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29527012/accuracy-of-intraocular-lens-power-calculation-using-three-optical-biometry-measurement-devices-the-oa-2000-lenstar-ls900-and-iolmaster-500
#12
Olga Reitblat, Adi Levy, Guy Kleinmann, Ehud I Assia
PURPOSE: To compare ocular measurements of three optical biometry devices and their application in intraocular lens (IOL) power calculations. METHODS: One hundred and forty eyes which had undergone cataract extraction surgery with preoperative biometry with OA--2000, IOLMaster-500, and Lenstar-LS900 were enrolled. Biometry measurements of the three devices were compared. The deviation of the postoperative refraction from the preoperative refractive target was calculated with different formulas (Barrett Universal II, Hoffer Q, Holladay I, and SRK/T)...
March 12, 2018: Eye
https://www.readbyqxmd.com/read/29523441/visual-and-refractive-outcomes-in-manual-versus-femtosecond-laser-assisted-cataract-surgery-a-single-center-retrospective-cohort-analysis-of-1838-eyes
#13
Thomas A Berk, Matthew B Schlenker, Xavier Campos-Möller, Austin M Pereira, Iqbal Ike K Ahmed
PURPOSE: Femtosecond laser-assisted cataract surgery (FLACS) has emerged as an alternative to manual cataract surgery (MCS) for corneal incision and capsulorhexis creation, as well as nuclear fragmentation. This study compares postoperative refractive and visual outcomes in eyes receiving MCS or FLACS. DESIGN: Single-center, comparative, retrospective cohort analysis. PARTICIPANTS: Consecutive eyes receiving FLACS and MCS from July 1, 2012, to July 31, 2015, at a single tertiary care center...
March 6, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29498015/enhanced-penetration-for-axial-length-measurement-of-eyes-with-dense-cataracts-using-swept-source-optical-coherence-tomography-a-consecutive-observational-study
#14
Nino Hirnschall, Ralph Varsits, Birgit Doeller, Oliver Findl
INTRODUCTION: The aim of this study was to find cases in which the axial eye length could not be measured with partial coherence interferometry (PCI) technology and to assess if it could be measured using swept source optical coherence tomography (ss-OCT) technology. METHODS: All patients were measured at their pre-assessment visit 1 week prior to cataract surgery using conventional optical biometry (PCI technology, IOLMaster 500, Carl Zeiss Meditec AG, Jena, Germany)...
March 1, 2018: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/29487819/comparison-of-peripapillary-retinal-nerve-fiber-layer-thickness-between-myopia-severity-groups-and-controls
#15
Evelyn Li Min Tai, Jiunn Loong Ling, Eng Hui Gan, Hussein Adil, Wan-Hitam Wan-Hazabbah
AIM: To compare the peripapillary retinal nerve fiber layer (RNFL) thickness measured via optical coherence tomography (OCT) between different groups of myopia severity and controls. METHODS: This was a prospective cross-sectional study. All subjects underwent a full ophthalmic examination, refraction, visual field analysis and A-scan biometry. Myopic patients were classified as low myopia (LM) [spherical equivalent (SE) from greater than -0.5 D, up to -3.0 D], moderate myopia (MM; SE greater than -3...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29459040/interocular-axial-length-and-corneal-power-differences-as-predictors-of-postoperative-refractive-outcomes-after-cataract-surgery
#16
Vinay Kansal, Matthew Schlenker, Iqbal Ike K Ahmed
PURPOSE: To determine whether differences between eyes in axial length (AL) and corneal power (K) on optical biometry are predictive of refractive outcomes. DESIGN: Retrospective cohort study. PARTICIPANTS: A total of 729 patients (1458 eyes) who underwent bilateral phacoemulsification at TLC (Mississauga, Ontario, Canada) from September 2013 to August 2015. METHODS: We compared the proportion of patients having >0...
February 16, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29439700/ocular-dimensions-of-the-chinese-adolescents-with-keratoconus
#17
Weijun Jian, Yang Shen, Yingjun Chen, Mi Tian, Xingtao Zhou
BACKGROUND: Adolescent KC is a special segment of the general KC population because an adolescents's eyes are still susceptible to blurred vision and optical defocus during the sensitive period of ocular and visual development. In the present study, we evaluated the ocular dimensions of 53 KC adolescents. METHODS: One hundred and six KC eyes of 53 (42 boys and 11 girls) KC adolescents (age 15.5 ± 1.7 years, range 11 to 18) were involved in this retrospective study...
February 13, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29395595/toric-intraocular-lens-outcomes-with-a-new-protocol-for-iol-selection-and-implantation
#18
K D Clark
INTRODUCTION: The published literature on toric intraocular lenses (IOL) reports postoperative refractive cylinder less than or equal to 0.5 D in anywhere from 25% to 100% of implantations with both the Acrysof® Toric and Tecnis® Toric IOL, depending upon the article. However, the majority of articles tend to cite rates between 70% and 80%. PURPOSE: The purpose was to evaluate my personal outcomes for both models of toric IOL, in terms of one-month postoperative refractive cylinder, after implementation of new methods of IOL selection, calculation and implantation...
February 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29392397/efficiency-and-measurements-agreement-between-swept-source-oct-and-low-coherence-interferometry-biometry-systems
#19
Jorge A Calvo-Sanz, Alejandro Portero-Benito, Alfonso Arias-Puente
PURPOSE: To compare and evaluate the agreement between the measurements obtained with a swept-source optical coherence tomography (OCT)-based biometer, the IOLMaster® 700 (IOLM), and those obtained by an optical biometer based on optical low-coherence interferometry (OLCI), the Aladdin (ALD); To evaluate the ability to perform biometric measurements in those eyes with transparency alterations. METHODS: Fifty-five eyes of 55 subjects were included in this study...
March 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29391573/myopia-prevalence-in-canadian-school-children-a-pilot-study
#20
Mike Yang, Doerte Luensmann, Desmond Fonn, Jill Woods, Debbie Jones, Keith Gordon, Lyndon Jones
PURPOSE: A pilot study to determine the prevalence of myopia, proportion of uncorrected myopia and pertinent environmental factors among children in a suburban region in Canada. METHODS: Refraction with cycloplegia and ocular biometry were measured in children of two age groups. Myopia was considered at a spherical equivalent refraction (SER) ≤-0.50 D in at least one eye. Parents completed a questionnaire that captured the child's daily activities. RESULTS: A total of 166 children completed the study (83 aged 6-8 and 83 aged 11-13)...
February 2, 2018: Eye
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