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https://www.readbyqxmd.com/read/28606071/the-increasing-prevalence-of-myopia-in-junior-high-school-students-in-the-haidian-district-of-beijing-china-a-10-year-population-based-survey
#1
Yan Li, Jia Liu, Pengcheng Qi
BACKGROUND: Myopia is a leading cause of preventable blindness. Although, multiple cross-sectional epidemiological studies have confirmed that there is a high prevalence of myopia in high school-aged students in China. However, few longitudinal studies have been performed to assess junior high school students. In the present study, we investigate changes in the prevalence of myopia in third year junior high school (grade 9) students in the Haidian District of Beijing, China, from 2006 to 2015...
June 12, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28569566/ocular-biometry-and-determinants-of-refractive-error-in-a-founder-population-of-european-ancestry
#2
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/28515427/pediatric-vision-screening-using-the-plusoptix-a12c-photoscreener-in-chinese-preschool-children-aged-3-to-4-years
#3
Dan Huang, Xuejuan Chen, Xiaohan Zhang, Yue Wang, Hui Zhu, Hui Ding, Jing Bai, Ji Chen, Zhujun Fu, Zijin Wang, Hu Liu
This study evaluated the performance of plusoptiX A12C in detecting amblyopia risk factors (ARFs) in Chinese children aged 3-to-4-year. PlusoptiX examination was successfully conducted among 1,766 subjects without cycloplegia to detect refractive error, asymmetry and media opacity. Cycloplegic retinoscopy (CR) was conducted on 357 children suspected of having vision abnormalities. Statistical differences between CR and the device were confirmed using the mean spherical value (+1.41 ± 0.87 D versus +1.14 ± 0...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28510771/inability-of-open-field-autorefraction-to-eliminate-accommodation-in-preschoolers
#4
Caner Kara, İkbal Seza Petriçli
PURPOSE: To evaluate the effectiveness of the Shin-Nippon NVision-K 5001 autorefractometer (Rexxam Co. Ltd., Osaka, Japan) (also branded as the Grand Seiko WR-5100K; Grand Seiko Co. Ltd., Hiroshima, Japan) based on the open-field refractometry principle in refractive measurements of preschool children and to determine its ability to eliminate accommodation adequately. METHODS: The refractive results of 114 preschool children who presented to the ophthalmology outpatient department for screening were evaluated...
May 15, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28471102/cycloplegic-refraction-in-hyperopic-children-effectiveness-of-a-0-5-tropicamide-and-0-5-phenylephrine-addition-to-1-cyclopentolate-regimen
#5
Seul Gi Yoo, Myung Jin Cho, Ungsoo Samuel Kim, Seung Hee Baek
PURPOSE: To evaluate the effectiveness of a cycloplegic regimen using 0.5% tropicamide and 0.5% phenylephrine (Tropherine, Hanmi Pharm), in addition to 1% cyclopentolate, in hyperopic children. METHODS: The medical records of hyperopic patients below the age of 14 years who had undergone cycloplegic retinoscopy were retrospectively reviewed. Cycloplegic refractions were performed using one of two cycloplegic regimens. Regimen 1 was a Tropherine-added regimen comprising the administration of one drop of 1% cyclopentolate followed by two to three drops of Tropherine added at 15-minute intervals...
April 24, 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28390411/prediction-accuracy-of-intraocular-lens-power-calculation-methods-after-laser-refractive-surgery
#6
Yubo Wu, Songyu Liu, Rongfeng Liao
BACKGROUND: This study aimed to evaluate the prediction accuracy of postoperative refractions using partial coherence interferometry (IOL-Master) and applanation ultrasound (AL-3000) assisted with corneal topography (TMS-4) in eyes that had undergone myopic laser-assisted in situ keratomileusis (LASIK). METHODS: Haigis-L formula, Koch-Maloney method using Haigis formula, Shammas clinically derived K-value (simulated keratometric value) correction (Shammas c.d.) using Haigis formula, and Shammas post-LASIK (Shammas-PL) formula were used in eyes with myopic LASIK...
April 8, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28332896/the-distribution-of-macular-thickness-and-its-determinants-in-a-healthy-population
#7
Hassan Hashemi, Mehdi Khabazkhoob, AbbasAli Yekta, Mohammad Hassan Emamian, Payam Nabovati, Akbar Fotouhi
PURPOSE: To determine the distribution of macular thickness in a healthy Iranian population aged 45-69 years and its association with certain determinants. METHODS: All participants underwent optometric examinations including measurement of uncorrected and corrected visual acuity, objective refraction by retinoscopy, and subjective refraction. Subsequently, all participants underwent slit-lamp biomicroscopy followed by fundus examination through direct and indirect ophthalmoscopy, and optical coherence tomography (OCT) imaging under pupil dilation...
March 23, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28251078/vasoactive-intestinal-peptide-a-promising-agent-for-myopia
#8
Ayse Idil Cakmak, Hikmet Basmak, Huseyin Gursoy, Mete Ozkurt, Nilgun Yildirim, Nilufer Erkasap, Mustafa Deger Bilgec, Nese Tuncel, Ertugrul Colak
AIM: To investigate the role of vasoactive intestinal peptide (VIP) in form-deprivation myopia (FDM). METHODS: FDM was created in three groups of eight chicks by placing a translucent diffuser on their right eyes. Intravitreal injections of saline and VIP were applied once a day into the occluded eyes of groups 2 and 3, respectively. Retinoscopy and axial length (AL) measurements were performed on the first and 8(th) days of diffuser wear. The retina mRNA levels of the VIP receptors and the ZENK protein in right eyes of the three groups and left eyes of the first group on day 8 were determined using real time polymerase chain reaction (PCR)...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28060058/corneal-collagen-cross-linking-for-keratoconus-in-pediatric-patients-long-term-results
#9
Prema Padmanabhan, Sudhir Rachapalle Reddi, Rama Rajagopal, Radhika Natarajan, Geetha Iyer, Bhaskar Srinivasan, Niveditha Narayanan, Meena Lakshmipathy, Shweta Agarwal
PURPOSE: To report the long-term outcome of corneal collagen cross-linking (CXL) for progressive keratoconus in pediatric patients. METHODS: "Epithelium-off" CXL was performed in pediatric eyes with progressive keratoconus. Spectacle-corrected distance visual acuity (CDVA), retinoscopy, topography, and tomography were documented preoperatively and postoperatively at 3 months, 6 months, 1 year, and annually thereafter. RESULTS: A total of 377 eyes of 336 pediatric patients aged 8 to 18 years with progressive keratoconus underwent CXL...
February 2017: Cornea
https://www.readbyqxmd.com/read/28032802/risk-factors-for-developing-myopia-among-schoolchildren-in-yerevan-and-gegharkunik-province-armenia
#10
Aida Giloyan, Tsovinar Harutyunyan, Varduhi Petrosyan
PURPOSE: Myopia is a complex condition leading to visual impairment and blindness. This study assessed the prevalence of and risk factors for myopia among schoolchildren in urban and rural areas of Armenia. METHODS: A cross-sectional interviewer-administered survey together with eye screenings was conducted among schoolchildren in the capital Yerevan and in Gegharkunik Province. The study used multi-stage random sampling to obtain the sample of 1260 schoolchildren...
April 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28030881/intra-and-inter-examiner-repeatability-of-cycloplegic-retinoscopy-among-young-children
#11
Sara J McCullough, Lesley Doyle, Kathryn J Saunders
PURPOSE: To evaluate the intra- and inter-examiner repeatability of cycloplegic retinoscopy in young children aged 4-5 years old. METHODS: Examiner 1 refracted all children in the first sample (n = 108); firstly with masked loose lenses, then using unmasked loose lenses (intra-examiner repeatability). Examiners 1 and 2 refracted all children in the second sample (n = 97) using unmasked loose lenses, blind to the child's refractive error, presence/magnitude of habitual spectacle correction and to each other's findings (inter-examiner repeatability)...
January 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28001106/evaluation-of-potential-risk-factors-for-development-of-primary-angle-closure-glaucoma-in-bouviers-des-flandres
#12
Alexis J Dubin, Ellison Bentley, Kevin A Buhr, Paul E Miller
OBJECTIVE To evaluate potential risk factors for development of primary angle-closure glaucoma (PACG) in Bouviers des Flandres. DESIGN Prospective, observational study. ANIMALS 98 Bouviers des Flandres. PROCEDURES All dogs underwent slit-lamp biomicroscopy, indirect ophthalmoscopy, gonioscopy, applanation tonometry, streak retinoscopy, and A-scan, B-scan, and high-resolution ultrasonography. Iridocorneal angles and degree of pectinate ligament dysplasia sheeting were graded, and an angle index was mathematically derived for each eye on the basis of these values...
January 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27968870/developmental-profile-of-ocular-refraction-in-patients-with-congenital-cataract-a-prospective-cohort-study
#13
Zhenzhen Liu, Erping Long, Jingjing Chen, Zhuoling Lin, Duoru Lin, Xiaohang Wu, Qianzhong Cao, Xiaoyan Li, Dongni Wang, Lixia Luo, Bo Qu, Runzhong Liu, Xiaopin Liu, Haotian Lin, Weirong Chen, Yizhi Liu
BACKGROUND: Refractive status is crucial to visual function and can change throughout life. For patients with congenital cataract, the developmental profile of refraction is complicated owing to the potential influence of diverse clinical manifestations and various treatments, and has not yet been fully characterised. METHODS: In this prospective cohort study, we enrolled patients with congenital cataract from the Childhood Cataract Program of the Chinese Ministry of Health (CCPMOH)...
October 2016: Lancet
https://www.readbyqxmd.com/read/27960580/prevalence-and-causes-of-visual-impairment-and-blindness-among-cocoa-farmers-in-ghana
#14
Samuel Bert Boadi-Kusi, Rekha Hansraj, Khathutshelo Percy Mashige, Alfred Osafo-Kwaako, Alex Azuka Ilechie, Samuel Abokyi
PURPOSE: To determine the prevalence and causes of visual impairment and blindness among cocoa farmers in Ghana in order to formulate early intervention strategies. METHODS: A cross-sectional study using multistage random sampling from four cocoa growing districts in Ghana was conducted from November 2013 to April 2014. A total of 512 cocoa farmers aged 40 years and older were interviewed and examined. The brief interview questionnaire was administered to elicit information on the demographics and socioeconomic details of participants...
February 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27932859/central-corneal-thickness-of-iraqi-population-in-relation-to-age-gender-refractive-errors-and-corneal-curvature-a-hospital-based-cross-sectional-study
#15
Yasir Jawad Kadhim, Qasim K Farhood
BACKGROUND: Central corneal thickness (CCT) is an important indicator of corneal status. Its measurement provides valid information about corneal physiological condition and possible changes associated with diseases, traumas, and hypoxia. It is an integral part for interpretation of intraocular pressure and glaucoma patient management and in prerefractive procedure assessment. OBJECTIVE: The aim of this study is to determine the mean CCT among a normal Iraqi population and to correlate between CCT and age, gender, refraction, and corneal curvature...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27921328/comprehensive-profile-of-bilateral-astigmatism-rule-similarity-and-symmetry-patterns-of-the-axes-in-the-fellow-eyes
#16
Amir Asharlous, Mehdi Khabazkhoob, Abbasali Yekta, Hassan Hashemi
PURPOSE: To study rule similarity (isorule or anisorule) and symmetry patterns of axes (direct and mirror) in bilateral astigmatism. METHODS: Six years of data were collected from four ophthalmology clinics in Tehran. After applying the exclusion criteria (having eye disease or history of ocular surgery), final analyses were performed on data of 160 608 cases whose mean age was 39.2 ± 15.4 years (10-80 years) and 53.7% female. All subjects had autorefraction, retinoscopy, and subjective refraction data...
January 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/27918352/corneal-collagen-cross-linking-for-keratoconus-in-pediatric-patients-long-term-results
#17
Prema Padmanabhan, Sudhir Rachapalle Reddi, Rama Rajagopal, Radhika Natarajan, Geetha Iyer, Bhaskar Srinivasan, Niveditha Narayanan, Meena Lakshmipathy, Shweta Agarwal
PURPOSE: To report the long-term outcome of corneal collagen cross-linking (CXL) for progressive keratoconus in pediatric patients. METHODS: "Epithelium-off" CXL was performed in pediatric eyes with progressive keratoconus. Spectacle-corrected distance visual acuity (CDVA), retinoscopy, topography, and tomography were documented preoperatively and postoperatively at 3 months, 6 months, 1 year, and annually thereafter. RESULTS: A total of 377 eyes of 336 pediatric patients aged 8 to 18 years with progressive keratoconus underwent CXL...
December 1, 2016: Cornea
https://www.readbyqxmd.com/read/27891365/visual-function-and-ocular-status-in-children-with-disabilities-in-special-schools-of-northern-india
#18
Gurvinder Kaur, Satish Thomas, Mahesh Jindal, S M Bhatti
INTRODUCTION: Children with disabilities (other than visual impairment) are at a higher risk of visual impairment as compared to normal population. Majority of the ocular disorders, like refractive errors and strabismus, are easily treatable. As these children depend on their visual inputs for social and academic activities, an early detection and prompt treatment of even a minor visual problem is of utmost importance for them. AIM: To assess the visual function and ocular status of children with disabilities other than visual impairment and to identify the preventable and treatable causes of visual impairment...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27852399/-analysis-of-the-influence-factors-of-school-age-children-s-refractive-status
#19
Z G Chen, M C Chen, J Y Zhang, D Q Cai, Q Wang, S S Lin, J W Chen, H L Zhong
Objective: To analyze the influence of the eye biological parameters, height, and weight on the school-age children's refractive status. Methods: Cross-sectional study. A total of 1 656 children (1 656 eyes), aged from 7 to 14 years, were selected from 8 schools in Wenzhou during June 2012 and June 2013. The height and weight of each child were measured, and the body mass index (BMI) was calculated. The eye biological parameters, including axial length (AL), corneal power (C=1/CR), anterior chamber depth (ACD), and white to white (WTW), were measured by IOLMaster (version 5...
November 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27829051/scleral-cross-linking-using-riboflavin-uva-irradiation-for-the-prevention-of-myopia-progression-in-a-guinea-pig-model-blocked-axial-extension-and-altered-scleral-microstructure
#20
Shuai Liu, Shengjie Li, Bingjie Wang, Xiao Lin, Yi Wu, Hong Liu, Xiaomei Qu, Jinhui Dai, Xingtao Zhou, Hao Zhou
PURPOSE: To develop methods of collagen cross-linking (CXL) in the sclera for the treatment of progressive myopia and to investigate the biomechanical and histological changes that occur in as a result. METHODS: Twenty 14-day-old guinea pigs were divided into 3 groups: the cross-linking group (CL, n = 8), non cross-linking group (NCL, n = 8), and control group (n = 4). The scleras of the right eyes of the guinea pigs in the CL group were surgically exposed and riboflavin was dropped onto the irradiation zone for 20 seconds prior to ultraviolet-A (UVA) irradiation...
2016: PloS One
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