检索结果-南通市图书馆

Two-year longitudinal change in choroidal and retinal thickness in school-aged myopic children:exploratory analysis of clinical trials for myopia progression

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Eye and Vision 2024年第4期10卷 1-10页

作者： Meiping Xu Xinping Yu Minghui Wan Kemi Feng Junxiao Zhang Meixiao Shen BjÖrn Drobe Hao Chen Jia Qu Jinhua Bao Eye Hospital and School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhouZhejiangChina National Clinical Research center for Ocular Diseases WenzhouZhejiangChina. WEiRC WMU-Essilor International Research CenterWenzhouZhejiangChina R&D Vision Sciences AMERA EssilorInternationalSingaporeSingapore

Background:With increasing axial length(AL)and myopia progression,the micro-structure of the retina and choroid gradually *** study describes the longitudinal changes in retinal and choroidal thickness in school-aged children with myopia and explores the relationship between changes in choroidal thickness and myopia ***:An exploratory analysis of a randomized trial was ***(n=168,aged 7 to 12 years)with myopia from-0.75 diopter(D)to-4.00 D were enrolled in this prospective longitudinal *** refraction,AL,retinal and choroidal thicknesses were measured at baseline and at 1-and 2-year follow-ups."Rapid progression myopia"was defined as increasing in myopia>1.00 D and'"stable progression myopia"was≤1.00 D during the 2-year *** affecting the changes in choroidal thickness were analysed using linear mixed ***:AL significantly increased by 0.67±0.24 mm with a myopic shift of-1.50±0.64 D over the 2 *** overall retinal thickness increased from 251.12±15.91μm at baseline to 253.47±15.74μm at the 2-year followup(F=23.785,P<0.001).The subfoveal choroidal thickness decreased from 231.03±54.04μm at baseline to 206.53±59.71μm at the 2-year follow-up(F=73.358,P<0.001).Choroidal thinning was significantly associated with AL elongation(β=-43.579μm/mm,P=0.002)and sex(β=-17.258,P=0.001).Choroidal thickness continued to decrease in subjects with rapid progression(F=92.06,P<0.001)but not in those with steady progression(F=2.23,P=0.119).Conclusion:Significant choroidal thinning was observed and was associated with rapid progression and *** findings indicate a need to understand the role of the choroid in eye growth and myopia ***/Precis:The macular choroidal thickness of myopic children is relevant to different degrees of myopic progression in this 2-year longitudinal *** findings suggest that control of choroidal thickness might work to regulate human ocular growth.

关键词： Axial length Choroidal thickness Children Myopia Spectral-domain optical coherence tomography

Ocular surface in patients with different degrees of myopia

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7期17卷 1313-1321页

作者： Yan-Yun Lyu Shuang Wang Xiao-Niao Chen Zhen-Yu Wang Shan-Shan Huang Yan Yuan Hong-Shuang Lu Wen-Li Yang Li-Ya Qiao Lei Tian Ying Jie Tongren Eye Care center Beijing Tongren HospitalCapital Medical UniversityBeijing 100730China Beijing Institute of Ophthalmology Beijing Tongren Eye CenterBeijing Tongren HospitalCapital Medical University and Beijing Ophthalmology and Visual Sciences Key LaboratoryBeijing 100730China Department of Ophthalmology the Third Medical Center of Chinese People’s Liberation Army General HospitalBeijing 100039China Department of Ophthalmology and Visual Science Tokyo Medical and Dental UniversityTokyo 113-8510Japan

AIM:To investigate the clinical features of the ocular surface in patients with different degrees of ***:A cross-sectional study was conducted involving 122 participants with myopia in Beijing Tongren Hospital from February to June,*** completing the Ocular Surface Disease Index(OSDI)score scale,measurements were taken for refraction,biometric parameters and ocular surface *** prevalence,severity and related parameters of the dry eye among different groups based on axial length(AL)were *** analysis was performed between ocular surface parameters and refraction/biometric measurement ***:Statistically significant differences were observed in refractive error,corneal thickness,anterior chamber depth,and subfoveal choroidal thickness among the groups(all P<0.05).With the increase in AL,the incidence and severity of dry eye increased significantly(P<0.05).Moreover,the tear film break-up time(BUT)shortened(P<0.05),and the corneal fluorescein staining(CFS)points increased significantly(P<0.05).OSDI scores were positively correlated with AL and spherical equivalent(SE;both P<0.05);BUT was negatively correlated with AL,SE,and corneal astigmatism(AST;all P<0.05);Schirmer I test(SIT)results were negatively correlated with AL and SE(both P<0.05).CONCLUSION:AL elongation is a risk factor for dry eye onset in myopic *** longer the AL,the more severe the dry eye is,with the increased CFS spots and tear film ***,SE and AST exhibit negative correlations with dry eye symptom scores and ocular surface parameters.

关键词： myopia axial length ocular surface dry eye

Age-specific distribution of oculometric parameters and myopia in children aged 8-12y

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10期17卷 1887-1897页

作者： Tao Tang Si-Tong Chen Heng Zhao Kai Wang Ming-Wei Zhao Department of Ophthalmology&Clinical Centre of Optometry Peking University People’s HospitalBeijing 100044China Institute of Medical Technology Peking University Health Science CenterBeijing 100083China College of Optometry Peking University Health Science CenterBeijing 100083China Eye Disease and Optometry Institute Peking University People’s HospitalBeijing 100044China Beijing Key Laboratory of the Diagnosis and Therapy of Retinal and Choroid Diseases Beijing 100044China National Clinical Research center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina

AIM:To describe the distribution of ocular biometrics and to evaluate its associations with refractive error and to assess the contribution from ocular parameters to refractive error among Chinese myopic ***:This cross-sectional study evaluated subjects aged ***,ocular biometry,and cycloplegic autorefraction were performed on each *** equivalent refraction(SER)and ocular biometrics were assessed as a function of age and *** Pearson correlation analysis between SER and ocular biometrics was carried *** linear regression was performed to analyze the association between SER and ocular ***:A total of 689 out of 735 participants(321 boys,48.1%)were analyzed,with a mean SER of-2.98±1.47 diopter(D).Axial length(AL),anterior chamber depth(ACD),corneal radius of curvature(CR),horizontal visible iris diameter(HVID),central corneal thickness(CCT)and lens power(LP)showed normal *** AL,AL/CR ratio,ACD and CR increased from 8 to 12y of age,while SER and LP decreased,HVID and CCT remained *** was no difference in *** decreased by 0.929 D for every 1 mm increase in AL and decreased by 1.144 D for every 0.1 increase in AL/CR *** Pearson correlation coefficient between SER and AL was-0.538(P<0.01)and-0.747(P<0.01)between SER and AL/CR *** the SER variance,AL explained 29.0%,AL/CR ratio explained 55.7%,while AL,CR,ACD and LP explained 99.3%after adjusting for age and ***:The AL,CR,ACD and LP are the most important determinants of myopic refractive error during myopia progression.

关键词： myopia ocular biometry refractive error population-based study

Ten-year observation of corneal densitometry and associated factors following small incision lenticule extraction

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3期17卷 485-490页

作者： Xiao-Song Han Fei Xia Zhuo-Yi Chen Pei-Jun Yao Dong-Mei Yang Jing Zhao Xing-Tao Zhou Eye Institute and Department of Ophthalmology Eye&ENT HospitalFudan UniversityShanghai 200031China NHC Key Laboratory of Myopia(Fudan University) Key Laboratory of MyopiaChinese Academy of Medical SciencesShanghai 200031China Shanghai Research center of Ophthalmology and Optometry Shanghai 200031China Shanghai Engineering Research center of Laser and Autostereoscopic 3D for Vision Care(20DZ2255000) Shanghai 200031China

●AIM:To investigate the long-term changes of corneal densitometry(CD)and its contributing elements after small incision lenticule extraction(SMILE).●METHODS:Totally 31 eyes of 31 patients with mean spherical equivalent of-6.46±1.50 D and mean age 28.23±7.38y were ***-scale examinations were conducted on all patients preoperatively and during *** acuity,manifest refraction,axial length,corneal thickness,corneal higher-order aberrations,and CD were evaluated.●RESULTS:All surgeries were completed successfully without complications or adverse ***-year safety index was 1.17±0.20 and efficacy 1.04±*** value of 0–6 mm zones in central layer was statistically significantly lower 10y postoperatively,compared with preoperative values(0–2 mmΔ=-1.62,2–6 mmΔ=-1.24,P<0.01).There were no correlations between CD values and factors evaluated.●CONCLUSION:SMILE is a safe and efficient procedure for myopia on a long-term *** values get lower 10y postoperatively,whose mechanism is to be further discussed.

关键词： myopia small incision lenticule extraction corneal densitometry

Optimal distance from high power laser diode to cylindrical microlens in a coupling system

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2003年第2期1卷 96-98页

作者：王晓薇马骁宇肖建伟方高瞻冯小明刘媛媛刘斌 National Research center for Optoelectronic Engineering Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 National Research center for Optoelectronic Engineering Institute of Semiconductors Chinese Academy of Sciences Beijing 100083n a practical coupling system a cylindrical microlens is used to collimate the emission of a high power laser diode (LD) in the dimension perpendicular to the junction plane. Using passive alignment the LD is placed in the focus of the cylindrical microlens generally regardless of the performance of the multimode optical fiber and the LD. In this paper a more complete analysis is arrived at by ray-tracing technique by which the angle 9 of the ray after refraction is computed as a function of the angle θo of the ray before refraction. The focus of the cylindrical microlens is not always the optimal position of the LD. In fact in order to achieve a higher coupling efficiency the optimal distance from the LD to the cylindrical microlens is dependent on not only the radius R and the index of refraction n of the cylindrical microlens but also the divergence angle of the LD in the dimension perpendicular to the junction plane and the numerical aperture (NA) of the multimode optical fiber. The results of this discussion are in good agreement with experimental results.

In a practical coupling system, a cylindrical microlens is used to collimate the emission of a high power laser diode (LD) in the dimension perpendicular to the junction plane. Using passive alignment, the LD is placed in the focus of the cylindrical microlens generally, regardless of the performance of the multimode optical fiber and the LD. In this paper, a more complete analysis is arrived at by ray-tracing technique, by which the angle 9 of the ray after refraction is computed as a function of the angle θo of the ray before refraction. The focus of the cylindrical microlens is not always the optimal position of the LD. In fact, in order to achieve a higher coupling efficiency, the optimal distance from the LD to the cylindrical microlens is dependent on not only the radius R and the index of refraction n of the cylindrical microlens, but also the divergence angle of the LD in the dimension perpendicular to the junction plane and the numerical aperture (NA) of the multimode optical fiber. The results of this discussion are in good agreement with experimental results.

关键词： refraction Refractive index Semiconductor lasers

Bilateral retrocorneal hyaline scrolls secondary to asymptomatic congenital syphilis: A case report

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第10期9卷 2274-2280页

作者： Yu-Qi Jin Yong-Ping Hu Qi Dai Shuang-Qing Wu Department of Ophthalmology Hangzhou First People’s HospitalZhejiang University School of MedicineHangzhou 310006Zhejiang ProvinceChina The center of Cornea and refraction The Eye Hospital of Wenzhou Medical UniversityHangzhou 325027Zhejiang ProvinceChina Department of Ophthalmology Zhejiang Provincial Integrated Chinese and Western Medicine HospitalHangzhou 310003Zhejiang ProvinceChina

BACKGROUND Retrocorneal hyaline scrolls are a rare *** report a case of bilateral retrocorneal hyaline scrolls that were likely induced by asymptomatic congenital *** SUMMARY A 71-year-old woman presented with blurred vision due to ***-lamp microscopy revealed bilateral hyaline scrolls with a dichotomous branching pattern extending to the anterior chamber or rods attaching to the rough posterior surface of the *** patient was positive for syphilis-specific antibodies,with no ocular or systemic evidence of congenital or acquired *** cataract,retrocorneal scroll,and corneal endothelial gutta were *** scroll of the right eye was removed during cataract surgery and further observed using hematoxylin–eosin staining and scanning electron *** cornea of the right eye remained transparent,and the residual scroll seemed stable,however,the corneal endothelial density declined at 13 mo after *** vivo confocal microscopy revealed coalescence of corneal guttae at the level of the corneal endothelium or adhesion to the posterior surface of the endothelium,with enlarged endothelial cells in both *** keratocytes in the stroma and a highly reflective acellular structure at the level of the Descemet’s membrane were *** removed scroll had a cartilage-like hardness and a circularly arranged fiber-like acellular *** Occult congenital syphilis could induce corneal endothelial gutta and theformation of retrocorneal scrolls without other signs of ocular syphilis.

关键词： Scroll Corneal endothelium Congenital syphilis Syphilitic interstitial keratitis In vivo confocal microscopy Case report

Establishing and Validating Refractive Error Reference Values for Myopia Prediction Among Children Aged 6–12 Years-Jiangsu Province,China,2018-2023

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2024年第32期6卷 804-810页

作者： Xiyan Zhang Chen-Wei Pan Wei Du Yonglin Zhou Jie Yang Yan Wang Yiliang Xin Wei Lu Hongxia Ma School of Public Health Nanjing Medical UniversityNanjing CityJiangsu ProvinceChina Jiangsu Provincial center for Disease Control and Prevention Nanjing CityJiangsu ProvinceChina School of Public Health Suzhou Medical College of Soochow UniversitySuzhou CityJiangsu ProvinceChina School of Public Health Southeast UniversityNanjing CityJiangsu ProvinceChina

Summary What is already known about this topic?Previously,it has been proved that a simplified model that uses refraction error value provides a robust and efficient means of predicting myopia for non-myopic *** targeting non-myopic children with alert refraction errors(or insufficient hyperopia reserve)holds significant importance in reducing the incidence rate of *** is added by this report?This study,comprising two phases(surveillance and cohort studies),was aiming to pinpoint the precise refractive error value for the onset of myopia prediction among non-myopic children in Jiangsu *** are the implications for public health practice?First,when conducting myopia screenings using pupil dilation for non-myopic populations:the cycloplegic 50th percentile refractive error emerges as a more precise predictive ***,when conducting myopia screenings without pupil dilation:this study advocates for the incorporation of axial length(AL)and corneal curvature(CC)values as supplementary indicators in screenings.

关键词： precise dating holds

First-Arrival Picking Method for Active Source Data with Ocean Bottom Seismometers Based on Spatial Waveform Variation Characteristics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2024年第4期23卷 970-980页

作者： LIU Hongwei XING Lei ZHU Henghua ZHANG Jin ZHANG Jing LIU Huaishan Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationCollege of Marine GeosciencesOcean University of ChinaQingdao 266100China Laboratory for Marine Mineral Resources Qingdao Marine Science and Technology CenterQingdao 266071China College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001China Shandong Institute of Geological Survey Jinan 250014China

The precision and reliability of first-arrival picking are crucial for determining the accuracy of geological structure inversion using active source ocean bottom seismometer(OBS)refraction *** methods for first-arrival picking based on sample points are characterized by theoretical errors,especially in low-sampling-frequency OBS data because the travel time of seismic waves is not an integer multiple of the sampling *** this paper,a first-arrival picking method that utilizes the spatial waveform variation characteristics of active source OBS data is ***,the distribution law of theoretical error is examined;adjacent traces exhibit variation characteristics in their ***,a label cross-correlation superposition method for extracting highfrequency signals is presented to enhance the first-arrival picking *** from synthetic and field data verify that the proposed approach is robust,successfully overcomes the limitations of low sampling frequency,and achieves precise outcomes that are comparable with those of high-sampling-frequency data.

关键词： first-arrival picking spatial waveform variation label cross-correlation superposition method

Distribution and correlation of refractive parameters in children with different corneal curvatures in southeast China

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2024年第4期17卷 713-720页

作者： Si-Yuan He Ting He Meng-Yue Xu Ying-Jie Ni Chao-Yang Hong Ting Shen The Second Clinical College Zhejiang Chinese Medical UniversityHangzhou 310053Zhejiang ProvinceChina Department of Ophthalmology Zhejiang Provincial People’s HospitalAffiliated People’s HospitalHangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina Eye center the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina

AIM:To analyze the distribution of refractive status in school-age children with different corneal curvatures(CC)and the correlation between CC and refractive ***:A total of 2214 school-aged children of grade 4 in Hangzhou who were screened for school myopia were *** distance visual acuity(UCDVA),non-cycloplegic refraction,axial length(AL),horizontal and vertical corneal curvature(K1,K2)were measured and spherical equivalent(SE),corneal curvature radius(CCR)and axial length/corneal radius of curvature ratio(AL/CR)were ***<5.0 and SE≤-0.50 D were classified as school-screening *** to the different CCRs,the patients were divided into the lower corneal curvature(LCC)group(CCR≥7.92)and the higher corneal curvature(HCC)group(CCR<7.92).Each group was further divided into the normal AL subgroup and the long AL *** refractive parameters were compared to identify any differences between the two ***:Both SE and AL were greater in the LCC group(P=0.013,P<0.001).The prevalence of myopia was 38% in the LCC group and 44% in the HCC group(P<0.001).The proportion of children without screening myopia was higher in the LCC group(62%)than in the HCC group(56%).Among these children without screening myopia,the proportion of long AL in the LCC group(24%)was significantly higher than that in the HCC group(0.012%;P<0.001).The change of SE in the LCC group was less affected by the increase of AL than that in the HCC ***:School-aged children in the LCC group have a lower incidence of screening myopia and longer *** CC can mask SE reduction and AL growth to some extent,and the change of AL growth change more in children with low CC than high *** the onset of myopia,its growth rate is even faster than that after the onset of myopia.

关键词： school-aged children corneal curvature axial length spherical equivalent myopia screening