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Basement interface structural characteristics beneath Jiashi strong earthquake swarm area in Xinjiang, China

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Acta Seismologica Sinica(English Edition) 2007年第5期20卷 507-512页

作者：徐朝繁段永红田晓峰潘纪顺张建狮胡修奇 Geophysical Exploration center China Earthquake Administration Earthquake Administration of Henan Province

The seismic data obtained from high resolution seismic refraction profile in Jiashi strong earthquake swarm area in Xinjiang, China were further processed with ray hit analysis method and more complete basement interface structural characteristics beneath Jiashi strong earthquake swarm area were determined. The results show that there are two clear basement interfaces at the upper crust in Jiashi strong earthquake swarm area. The first one with buried depth ranging from 2.6 km to 3.3 km presents integral and continuous structure, and it appears an inclined plane interface and smoothly rises up toward Tianshan Mountain. The second basement interface with buried depth from 8.5 km to 11.8 km, is the antiquated crystalline basement of Tarim basin. Near the post number of 37 km, the buried depth of the crystalline basement changed abruptly by 2.5 km, which maybe result from an ultra crystalline basement fault. If taking this fault as a boundary, the crystalline basement could be divided into two parts, i.e. the southwestern segment with buried depth about 11.5 km, and the northeastern segment with buried depth approxi-mately from 8.5 km to 9.0 km. That is to say, in each segment, the buried depth changes not too much. The northeast segment rises up as a whole and upheaves slightly from southwest to northeast, which reflects the upper crustal deformation characteristics under the special tectonic background at the northwestern edge of Tarim basin.

关键词： Jiashi strong earthquake swarm area high resolution refraction survey ray hit analysis method basement interface structure, ultra crystalline basement fault

Analysis of the Prevalence and Situation of Myopia in Adolescents from South China

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Eye Science 2015年第2期30卷 53-55,74页

作者： Shuiming Yu Hongxing Diao Junwen Zeng Zhongshan Ophthalmic center Sun Yat-sen University

Purpose: To conduct dynamic detection of refraction changes in adolescents with myopia and analyze the correlation between different reexamination times and factors that included age of onset, initial refractive power, and rate of myopia ***: A total of 900 adolescents(aged 6-15 years) with myopia admitted to Zhongshan Ophthalmic center between2009 and 2013 were randomly selected in this *** participants underwent objective refraction measurement with an autorefractometer(Topcon 8900) or streak retinoscopy and subjective refraction detection with an autorefractor(Nidek).or minus-lens procedures at different time intervals(6months, 1, and 2 years). Accurate refractive power was obtained..All data were analyzed with SPSS 18.0 statistical ***:.The mean refractive power was increased by 0.56 ±0.37 diopters(D) after 6 months,.by 0.83±0.45 D after 1 year,.and by 1.50±0.70 D after 2 years..Among the 900 adolescents,.the most rapid increase in refractive power was observed at the age of 8 years at the 6-month reexamination, at the age of8 and 9 years at the 1-year reexamination,.and at the age of 7-9 years at the 2-year reexamination..The increase in index of refraction tended to diminish with aging..The different cycles of reexamination revealed a slowing of the rate of myopia progression along with the increase in the initial index of refraction..The highest rate of myopia progression was noted in low-myopic adolescents with initial refractive power ranging from-0.25 to 2.75 ***:.No positive correlation was documented between different cycles of reexamination and the refractive power. The increase in refractive power was associated with factors that included the reexamination cycle, age of onset, and initial refractive power.

关键词：青少年近视患病率中国动态检测时间间隔屈光度随机选择

Relationship between Refractive Error and Ocular Biometrics in Twin Children:the Guangzhou Twin Eye Study

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Eye Science 2014年第3期29卷 129-133页

作者： Decai Wang Bin Liu Shengsong Huang Wenyong Huang Mingguang He Zhongshan Ophthalmic center Sun Yat-sen University

Purpose:A cross-sectional study was conducted to explore the relationship between refractive error and ocular biometrics in children from the Guangzhou twin eye ***:.Twin participants aged 7-15 years were selected from Guangzhou Twin Eye Study..Ocular examinations included visual acuity measurement, ocular motility evaluation, autorefraction under cycloplegia, and anterior segment, media, and fundus examination...Axial length(AL),..anterior cham ber depth(ACD), and corneal curvature radius were measured using partial coherence laser interferometry. A multivariate linear regression model was used for statistical ***:.Twin children from Guangzhou city showed a decreased spherical equivalent with age,.whereas both AL and ACD were increased and corneal curvature radius remained unchanged. When adjusted by age and gender, the data from77% of twins presenting with spherical equivalent changes indicated that these were caused by predictable variables.(R2=0.77, Prefraction included axial length(β=-0.97,Prefraction(β=-0.01, P=0.25).Conclusion:.refraction is correlated with ocular *** status is largely determined by axial length as the major factor.

关键词：屈光不正生物识别广州市儿童科研多元线性回归模型曲率半径 ACD

The associations of lens power with age,axial length and type 2 diabetes mellitus in Chinese adults aged 50 and above

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Eye and Vision 2020年第6期7卷 563-570页

作者： Luyao Ye Jiangnan He Xinji Zhang Yi Xu Qiuying Chen Yao Yin Ying Fan Lina Lu Jianfeng Zhu Haidong Zou Xun Xu Department of Preventative Ophthalmology Shanghai Eye Disease Prevention and Treatment CenterShanghai Eye HospitalNo.380 Kangding RoadShanghai 200040China Department of Ophthalmology Shanghai General HospitalShanghai Jiao Tong UniversityNational Clinical Research Center for Eye DiseasesShanghai Key Laboratory of Ocular Fundus DiseasesShanghai Engineering Center for Visual Science and PhotomedicineShanghai Engineering Center for Precise Diagnosis and Treatment of Eye DiseasesNo.100 Haining RoadShanghai 200080China Department of Health Statistics Naval Military Medical UniversityNo.800 Xiangyin RoadShanghai 200433China

Background:To investigate the associations of lens power with age,axial length(AL),and Type 2 diabetes mellitus(DM)in Chinese adults aged 50 and ***:Random clustering sampling was used to identify adults aged 50 years and above in urban regions of *** participants underwent a comprehensive ophthalmic examination including subjective refraction,autorefraction,and *** crystalline lens power was calculated using Bennett’s ***:A total of 4177 adults were included.A linear decrease in lens power was observed both with age and with AL,followed by a stop of lens power loss after the age of 70 or when AL≥25 mm,*** with Type 2 DM presented higher lens power(0.43 diopter(D),p<0.001)and thicker lens thickness(0.06 mm,p<0.001).In multivariate regression models,there was a positive correlation between lens power and Type 2 DM when age<75 years(p<0.001)or AL<25 mm(p<0.001)after adjusting for other factors,while no significant association was found in participants aged≥75 years(p=0.122)or with AL≥25 mm(p=0.172).Conclusions:The lens power in adults aged 50 and above exhibited two stages with age and with *** 2 DM caused an increase in lens power,which was not seen in participants aged≥75 years or with AL≥25 mm.

关键词： Lens power Type 2 diabetes mellitus Chinese adults Cross-sectional study

Negative Goos-Hanchen Effect in Thin-Film Fabry-Perot Filter

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Chinese Physics Letters 2007年第7期24卷 2091-2093页

作者：李明宇刘旭马欣厉以宇顾培夫 State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 National center for Nanoscience and Technology Ueijing 100080

We investigate the Goos-Hgnchen effect of a Gaussian light beam reflected by the thin-film Fabry-Perot filter. It is shown that the Goos-Hanchen shift can be either negative or positive, The Gaussian-beam analysis and stationary phase method are introduced to calculate the lateral shift between the incident beam and the reflected beam at different wavelengths and to analyse the Goos-Hgnchen effect in the thin-film Fabry-Perot filter, The effect of the incident beam diameter is also discussed,

关键词： PHOTONIC CRYSTALS LATERAL DISPLACEMENT refraction BEAM SLAB PERMITTIVITY PERMEABILITY INCIDENT EPSILON MU

Relative peripheral refraction and its role in myopia onset in teenage students

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International Journal of Ophthalmology(English edition) 2022年第7期15卷 1108-1115页

作者： Lin-Song Qi Lu Yao Xue-Feng Wang Jin Zhao Yong Liu Teng-Yun Wu Qing-Hong Yang Chen Zhao Zhi-Kang Zou Department of Ophthalmology Air Force Medical CenterBeijing 100142China Department of Physical Examination Cadet Bureau of PLA Air ForceBeijing 100195China Department of Clinic and Research Air Force Medical CenterBeijing 100142China

AIM:To characterize peripheral refraction and its relationship with myopia development in a selected group of male teenage Chinese ***:This 2-year prospective cohort study randomly enrolled 85 non-myopic boys(age,14-16 y)from the Experimental Class of Air Force in *** peripheral refraction was examined at 0°,±10°,and±20°along the horizontal visual field in the right eye at the baseline and 2-year ***:The incidence of myopia at the 2-year followup was 15.29%(13/85).The baseline central refraction(CR)and peripheral refraction at±10°were significantly lower in students who developed myopia than in those who did not(Prefraction(RPR)did not differ between students with and without myopia(P>0.05).At the 2-year follow-up,the RPR at±10°and 20°nasal was significantly more hyperopic in the myopic group than in the non-myopic *** linear regression analysis indicated that the change in CR was significantly correlated with the changes in RPR at 20°nasal,10°nasal,and 20°*** Logistic regression analysis indicated that the baseline CR[odds ratio(OR):0.092,95%confidence interval(CI):0.012-0.688,P=0.020]and the baseline RPR at 10°nasal(OR:0.182,95%CI:0.042-0.799,P=0.024)were significantly correlated with incident myopia(Omnibus test,χ=10.20,P=0.006).CONCLUSION:CR change is significantly correlated with changes in RPR,and students who develop myopia have more relative peripheral *** baseline CR and relative peripheral hyperopia at 10°nasal are protective of myopia onset.

关键词： relative peripheral hyperopia peripheral refraction incident myopia schoolchildren

Dellen-like keratopathy associated with glaucoma drainage devices

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World Journal of Clinical Cases 2014年第1期2卷 1-4页

作者： Carlton Robert Fenzl Majid Moshirfar Adam John Gess Valliammai Muthappan Jason Goldsmith Department of Ophthalmology Jamaica Hospital Medical Center/NYMC Jamaica NY 11418 United States Moran Eye center University of UtahSalt Lake CityUT 84132United States

To report the first case of dellen-like keratopathy with superior corneal thinning associated with implantation of glaucoma drainage devices. A 70-year-old male with a history of primary open angle glaucoma and dry eye disease underwent placement of glaucoma drainage devices with antimetabolite application in both eyes. Prior to placement, minimal refractive error was noted on manifest refraction. Several years later, the patient was referred for decreased vision and corneal irregularity. Examination showed pathologic corneal curvature, superior corneal thinning, and epithelial demarcation lines immediately anterior to the glaucoma drainage devices in both eyes. The epithelium remained intact with no evidence of limbal stem cell deficiency. Manifest refraction revealed a large change in both eyes. Topography was used to confirm the presence of irregular corneal curvature anterior to the glaucoma drainage devices. Dellen-like keratopathy with superior thinning is a rare sequela after implantation of a glaucoma drainage device that must be considered in elderly patients who undergo glaucoma surgery. It is likely related to a combination of tear film alteration related to previously large anterior blebs, antimetabolite application, and aqueous humor flow patterns around the drainage devices. Treatment should focus on lubrication.

关键词： Dellen-like keratopathy Delle Glaucoma drainage device Corneal thinning

Ray hit analysis method and its application to complex upper crustal structure survey

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Acta Seismologica Sinica(English Edition) 2006年第2期19卷 173-182页

作者：徐朝繁张先康张建狮胡修奇 Geophysical Exploration center China Earthquake AdministrationZhengzhou 450002 China Earthquake Administration of Henan Province Zhengzhou 450000 China

Based on the results obtained from Pg wavefront imaging in active source deep seismic sounding, we propose a new ray hit analysis method for high-resolution seismic refraction profile data processing. This method can be used to further determine possible refraction interface, especially spatial location of basement and its pattern characteristics in complex upper crustal structure region, making data processing for high-resolution refraction profiles more fine. We use this method to study the crystalline basement structure of east part of A＇nyemaqên suite zone at northeast side of Qinghai-Xizang Plateau and the basement patterns as well as its spreading features at the east part of Anemaqen suite zone and its adjacent region were determined.

关键词： high-resolution refraction ray hit analysis A'nyemaqên suite zone basement structure

Residual refractive errors in pseudophakic eyes and related factors:a population-based study

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International Journal of Ophthalmology(English edition) 2023年第5期16卷 778-786页

作者： Hassan Hashemi Alireza Jamali Farhad Rezavn Alireza Hashemi Mehdi Khabazkhoob Noor Research center for Ophthalmic Epidemiology Noor Eye HospitalTehran ***Iran Noor Ophthalmology Research center Noor Eye HospitalTehran ***Iran Department of Basic Sciences School of Nursing and MidwiferyShahid Beheshti University of Medical SciencesTehran ***Iran

AIM: To determine residual refractive error after cataract surgery in pseudophakic eyes and its relationship with age, sex, and axial length(AL).METHODS: In this population-based cross-sectional study, the sampling was performed on individuals aged 60y and above in Tehran, Iran using a multi-stage stratified random cluster sampling method. Pseudophakic eyes with a best-corrected visual acuity of 20/32 or better were analyzed and their refractive results were ***: The mean spherical equivalent(SE) refraction was-0.34±0.97 diopters(D) and the mean absolute SE was 0.72±0.74 D with a median of 0.5 D. Moreover, 32.68%(n=546, 95%CI: 30.27%-35.08%), 53.67%(n=900, 95%CI: 51.23%-56.1%), 68.99%(n=1157, 95%CI: 66.96%-71.02%), and 79.73%(n=1337, 95%CI: 77.69%-81.76%) of the eyes had a residual SE within ±0.25, ±0.50, ±0.75, and ±1.00 D of emmetropia, respectively. According to the multiple logistic regression model, increasing age was associated with a statistically significant decrease in predictability for all cut points. Moreover, the predictability based on all cut points was significantly lower in individuals with an AL longer than 24.5 mm than in those with an AL between 22 to 24.5 ***: Based on the results, the accuracy of intraocular lens(IOL) power calculation is lower for those who underwent cataract surgery during the last 5y in Tehran, Iran. Among the most important influential factors, the choice of IOL or it's power disproportionate to eye conditions and age can be mentioned.

关键词： cataract surgery pseudophakic axial length residual refractive errors