检索结果-南通市图书馆

Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Eye and Vision 2021年第1期8卷 454-461页

作者： António Queirós Alejandro Cerviño JoséManuel González‑Méijome Clinical&Experimental Optometry Research Lab(CEORLab) Center of Physics(Optometry)University of MinhoCampus de Gualtar4710‑057 BragaPortugal Optometry Research Group Department of Optics and Optometry and Vision SciencesUniversity of ValenciaValenciaSpain

Purpose:To measure axial and off-axis refraction patterns in myopic eyes with spectacle lenses correction and lens free emmetropes in young healthy subjects at different target distances from 2.00 m(0.50 D)to 0.20 m(5.00 D)in terms of sphere,astigmatism,and spherical equivalent ***:Refraction was measured at the center,20 and 40 degrees from the line of sight both nasally and temporally in 15 emmetropic and 25 myopic young healthy subjects with an open field,binocular,infrared autorefractor(Grand Seiko WAM-5500,Hiroshima,Japan).Fixation target was a Maltese cross set at 2.00,0.50,0.33 and 0.20 m from the corneal *** in off-axis refraction with accommodation level were normalized with respect to distance axial values and compared between myopic eyes with spectacle lenses correction and lens free ***:Off-axis refraction in myopic eyes with spectacle lenses correction was significantly more myopic in the temporal retina compared to lens free emmetropes except for the closest target *** off-axis refractive error changed significantly with accommodation when compared to axial refraction particularly in the myopic *** change in the negative direction was due to changes in the spherical component of refraction that became more myopic relative to the center at the 0.20 m distance as the J0 component of astigmatism was significantly reduced in both emmetropes and myopes for the closest ***:Accommodation to very near targets(up to 0.20 m)makes the off-axis refraction of myopes wearing their spectacle correction similar to that of lens free emmetropes.A significant reduction in off-axis astigmatism was also observed for the 0.20 m distance.

关键词： Off-axis refraction Refractive error Accommodation myopia progression

Relative peripheral refraction across 4 meridians after orthokeratology and LASIK surgery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Eye and Vision 2018年第1期5卷 118-125页

作者： António Queirós Ana Amorim-de-Sousa Daniela Lopes-Ferreira César Villa-Collar Ángel Ramón Gutiérrez JoséManuel González-Méijome Clinical&Experimental Optometry Research Lab-CEORLab Center of Physics(Optometry)University of MinhoBragaPortugal Department of Optics and Optometry European University of MadridMadridSpain. Department of Ophthalmology University of MurciaMurciaSpain

Background:To characterize the axial and off-axis refraction across four meridians of the retina in myopic eyes before and after Orthokeratology(OK)and LASIK ***:Sixty right eyes with a spherical equivalent(M)between−0.75 to−5.25 D(cylinder0.05)from the post-treatment RPRE within 30°and 20°of the central visual field after LASIK and OK,*** results demonstrated that the treatment zone warrants an optimal central field of ***:The present study gives an overview of RPRE after refractive corneal reshaping treatments(OK and LASIK)across vertical,horizontal and two oblique meridians *** allows a 3D representation of RPRE at the retina and shows that the myopic shift induced by both treatments is more relevant in horizontal directions.

关键词： LASIK surgery Orthokeratology Peripheral refraction myopia progression

A machine learning-based algorithm used to estimate the physiological elongation of ocular axial length in myopic children

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Eye and Vision 2020年第1期7卷 485-496页

作者： Tao Tang Zekuan Yu Qiong Xu Zisu Peng Yuzhuo Fan Kai Wang Qiushi Ren Jia Qu Mingwei Zhao Department of Ophthalmology&Clinical Centre of Optometry Peking University People’s HospitalBeijing 100044China College of Optometry Peking University Health Science CenterBeijingChina Eye Disease and Optometry Institute Peking University People’s HospitalBeijingChina Beijing Key Laboratory of the Diagnosis and Therapy of Retinal and Choroid Diseases BeijingChina Academy for Engineering&Technology Fudan UniversityShanghaiChina Department of Biomedical Engineering College of EngineeringPeking UniversityBeijing 100871China School of Ophthalmology and Optometry and Eye Hospital Wenzhou Medical UniversityWenzhouZhejiangChina

Background:Axial myopia is the most common type of ***,due to the high incidence of myopia in Chinese children,few studies estimating the physiological elongation of the ocular axial length(AL),which does not cause myopia progression and differs from the non-physiological elongation of AL,have been *** purpose of our study was to construct a machine learning(ML)-based model for estimating the physiological elongation of AL in a sample of Chinese school-aged myopic ***:In total,1011 myopic children aged 6 to 18 years participated in this ***-sectional datasets were used to optimize the ML *** input variables included age,sex,central corneal thickness(CCT),spherical equivalent refractive error(SER),mean K reading(K-mean),and white-to-white corneal diameter(WTW).The output variable was AL.A 5-fold cross-validation scheme was used to randomly divide all data into 5 groups,including 4 groups used as training data and one group used as validation *** types of ML algorithms were implemented in our *** best-performing algorithm was applied to predict AL,and estimates of the physiological elongation of AL were obtained as the partial derivatives of AL_(predicted)-age curves based on an unchanged SER value with increasing ***:Among the six algorithms,the robust linear regression model was the best model for predicting AL,with a R^(2) value of 0.87 and relatively minimal averaged errors between the predicted AL and true *** on the partial derivatives of the AL_(predicted)-age curves,the estimated physiological AL elongation varied from 0.010 to 0.116 mm/year in male subjects and 0.003 to 0.110 mm/year in female subjects and was influenced by age,SER and *** to the model,the physiological elongation of AL linearly decreased with increasing age and was negatively correlated with the SER and the ***:The physiological elongation of the AL is rarely recorded in clinical data in

关键词： myopia myopia progression Machine learning Ocular axial length Physiological elongation Orthokeratology

Elementary school comprehensive intervention and myopia development:the Wenzhou Epidemiology of Refraction Error Study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2022年第8期15卷 1363-1369页

作者： Dan-Dan Jiang Jie Chen Frank Thorn Guang-Yun Mao Chun-Chun Li Zhong Lin Balamurali Vasudevan Xiao-Qiong Huang Yan-Yan Chen The Eye Hospital of Wenzhou Medical University Wenzhou 325000Zhejiang ProvinceChina Deptartment of Brain&Cognitive Sciences MIT CambridgeCambridgeMA 02139USA School of Public Health Wenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina College of Optometry MidWestern UniversityGlendaleAZ 84729USA

AIM:To investigate the effects of school-basedcomprehensive intervention on myopia development inelementary school ***:As a part of the Wenzhou Epidemiologyof Refraction Error Study,there were 1524 participatingelementary students(730 girls,47.9%)in grades 1 to3 from three campuses of one school,aged 7.3±0.9y,who were examined twice every year for a 2.5y follow *** intervention and other reminderswere given at school every semester for the *** control group did not receive comprehensiveintervention and did not have reminders of ***:There were 651 students in the interventiongroup[mean age 7.3±0.9y;294(45.2%)girls]and 737students in the control group[mean age 7.2±0.9y;346(46.9%)girls].Overall mean myopia progression duringthe 2.5y follow-up was-0.49±1.04 diopters(D)in theintervention group and-0.65±1.08 D in the control group(P=0.004).The majority that not get myopia at baselinespherical equivalent(SE≤-1.0 D).Their mean myopiaprogression during the 2.5y follow-up was-0.37±0.89 Din the intervention group and-0.51±0.93 D in the controlgroup(27.5%reduction,P=0.009);Overall,mean axiallength elongation was less in the intervention group(0.56±0.32 mm)than in the control group(0.61±0.38 mm,10.5%reduction,P=0.009).The percentage of close reading distance(myopia progression for children during the 2.5y follow-up,especially for those non-myopia at baseline.

关键词： myopia progression axial length comprehensive intervention school children

Retardation of myopia by atropine regimes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2024年第11期17卷 2129-2140页

作者： Qin Zhu Li Chen Jia-Rui Liang Min Hu Li-Ping Xue Guang-Long Zhou Yuan Zhou Jie-Ying Zhang David Fernandez-Hazoury Allison Helman Ying-Ting Zhu Xiao-Fan Zhang Department of Pediatric Ophthalmology Affiliated Hospital of Yunnan UniversityKunming 650021Yunnan ProvinceChina BioTissue(Tissue Tech Inc) MiamiFlorida 33032USA

myopia is a huge health problem due to its high frequency,vision losses and public health *** to the World Health Organization,at least 2.2 billion people have vision *** myopia can be controlled at its early and middle stages,unfortunately,no cure can be achieved so *** the methods to control myopia,atropine,a muscarinic receptor antagonist,is the oldest but still the most effective for retardation of myopia *** such a fact,standard protocols have not been established for clinicians to use atropine for treatment of *** this article,a concise and up to date summary of myopia epidemiology and pathogenesis and summarized therapeutic effects and side effects,possible mechanisms and application methods of atropine were provided in hope for clinical doctors to effectively control this problematic *** present,the protocol is recommend:use higher dose(1%)of atropine intermittently to effectively slowdown myopia progression in schoolchildren for 2y,and to significantly reduce side effects of atropine by decrease of atropine frequency for 1y and inhibit myopic rebound by withdrawal of topical atropine gradually for *** of a lower dose(0.05%)atropine regime should also be considered due to its effectiveness and application at regular basis.

关键词： myopia myopia progression atropine schoolchildren