学科分类
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162 个结果
  • 简介:AIM:Totestthehypothesisthatamblyopicneuroretinamayhaveanalteredthicknesswhencomparedtothenormal.·METHODS:Twenty-fiveamblyopic,youngpatientsbetweentheagesof7and11yearsoldwerestudied.Theinterestedneuroretinaareasaredefinedinto10sub-regionsaccordingtosuperior-inferior,nasal-temoral,andperi-paraaxis,whichcrossthefovelastructure.Thethicknessesoften,definedmacularregionswereseparatelymeasuredbyopticalcoherencetomography(OCT)andanalyzedbyt-test.·RESULTS:Theaveragethicknessofneuroretinaintheexactfoveolaoftheamblyopiceyesislargerthanthatofnormaleyes(P<0.05),buttheothernineregionshavenosignificantdifference.Interestingly,inboththenormalandamblyopiceyes,thetemporalarealooksthinnerthanotherquadrants(P<0.05).·CONCLUSION:Thicknessalterationmaybeassociatedwithamblyopicdisordersinyoungpatients.Studyingalargervolumeofsubjectsofsimilarageisrequiredtoconfirmthisobservation.

  • 标签: AMBLYOPIA MACULA flava optical COHERENCE TOMOGRAPHY
  • 简介:使用德国脉冲电离室测氡仪,在海口已知全新世活断层上进行了一条剖面土壤氡试验测量,测量点距为10m,异常点附近加密为5m,测量结果显示高值异常点位与断层位置相吻合,说明仪器测量质量和效果较高,测量装置合理,为今后工作积累了经验。

  • 标签: 土壤氡测量 活断层试验 海口市
  • 简介:摘要本文就4317综采工作面回采期间揭露的顶板逆断层,提出对顶板支护的方法和解决方案,制定了有针对性的施工措施,有效的控制了顶板,为工作面顺利推采奠定了基础。

  • 标签: 过构造 逆断层 开采分析
  • 简介:AIM:Tofindouttheoutcomeoflaserphotocoagulationinclinicallysignificantmacularedema(CSME)byopticalcoherencetomography(OCT).·METHODS:Itwasaprospective,non-controlled,caseseriesstudyenrolling81eyesof64patientswithCSMEbetweenAugust2008andJanuary2010.AllpatientsreceivedmodifiedgridphotocoagulationwithfrequencydoubledNd:YAGlaser.Eachpatientwasevaluatedintermsofbest-correctedvisualacuity(BCVA)andregressionorprogressionofmaculopathyafterlasertherapyat1,3and6months.Spearman’scorrelationtestwasusedtoshowthecorrelationbetweenBCVAandtotalmacularvolume(TMV).Analysisofvariance(ANOVA)wasusedtocompareamonggroupsandindependentt-testwasusedtocompareineachgroup.·RESULTS:ThereishighcorrelationbetweenBCVAandTMV(P≤0.001).BCVAimprovedin50.6%,remainedstaticin39.5%anddeterioratedin9.9%patientsafter6monthoftreatment.TheBaselineTMV(meanandSD)were9.26±1.83,10.4±2.38,11.5±3.05,8.89±0.75and9.47±1.98mm3fordifferentOCTpatterns,ST(spongelikethickening),CMO(cystoidmacularedema),SFD(subfovealdetachment),VMIA(Vitreomacularinterfaceabnormality)andaverageTMVrespectively(P=0.04).After6monthsoflasertreatment,themeanTMVdecreasedfrom9.47±1.98mm3to8.77±1.31mm3(P=0.01).InSTtherewassignificantdecreaseinTMV,P=0.01,Furtherwithinthesegroupsat6months,theyweresignificantlydifferent,P=0.01.·CONCLUSION:OCTshowedthedifferentmorphologicalvariantofCSMEwhiletheresponseoftreatmentisdifferent.TMVdecreasedthemostandhenceshowedtheimprovementinvisionafter6monthsoflasertreatment.IntheeraofAntivascularendothelialgrowthfactors(VEGFs),efficacyoflaserseemstobeinshadowbutitisstillfirstlineoftreatmentindevelopingnationlikeNepalwhereantiVEGFsmaynotbeeasilyavailableandaffordable.

  • 标签: Clinically SIGNIFICANT MACULAR EDEMA Grid laser
  • 简介:当越来越多的人涌向摄影这道门槛时,以摄影为职业求得生存的这扇大门却吝啬地难为每个人打开,令多少摄影者铩羽而归难入堂奥。摄影作品的价值怎么体现?摄影人怎样为自己求得生存空间?美国一位收藏家无意中以区区几十美元买进的一批底片竟价值2亿元.成为摄影界一笔最大买单而引发争议,也为上述问题作了注释。

  • 标签: 作品价值 摄影者 几何 摄影作品 摄影人 摄影界
  • 简介:冒险主义摄影师泰勒·罗伊默久负盛名,曾经为攀岩、冲浪、徒步户外旅行拍摄快照,可是相比于今天我们所见到的。前面描述的可真是小巫见大巫。也许再无其他事情能比这件事情更疯狂。

  • 标签: 摄影师 非典型 冒险主义 户外旅行 拍摄
  • 简介:六、生态摄影造型技法之三感本期,我们漫谈生态景物的基本特征造型——形态感、立体感和质感。形态感形态是生态景物基本特征的外部表现,是区别生态环境、物种类别、动物行为的基础,是物种在时空中的视觉印象,

  • 标签: 生态环境 空间立体感 表现形态 摄影 特征造型 造型手段