最新Eye & Vision Screening：眼睛和视力筛查课件PPT.ppt

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1、Eye&VisionScreening：眼睛和视力筛查StevePrepasMDHOAGHOSPITALNewportBeach25humanitariantrips11countriesQuynhKieuMDUniversityofSaigon,classof1975VisioninPreschoolersPercentageVisionImpairment10Strabismus4Amblyopia3-4TotalStrabismus/Amblyopia5-7SignificantRefractiveErrors5-7WhyDoEye&VisionScreening?5

2、–7%ofchildrenhaveamblyopia/strabismus1–2%ofallchildrenhaveunsuspectedamblyopia/strabismusAnisometropia(differentrefractiveerrorsineacheye)andsmallanglestrabismusaretheleadingcausesofundetectedamblyopiaEye&VisionScreeningProblemscanpresentatanytimeduringinfancy&earlychildhoodLife-threatenin

3、gdiseasesRetinoblastoma(maybeautosomaldominant)VisionthreateningconditionsROPCataractsGlaucomaAmblyopiaStrabismusOtherChildhoodOcularConditionsPercentageCongenitalcataract           0.06Congenitalglaucoma        0.01Retinoblastoma                  0.005ROP (ininfants<750g)52.00CataractCong

4、enitalGlaucomaRetinoblastomaRefractiveErrorsHyperopia–far-sightednessNormalchildrenareslightlyfar-sightedNormalchildrenaccommodate(focus)itawayInchildrenexcessivefar-sightednesscausesstrabismus+/oramblyopiainchildrenMyopia–near-sightednessBlurrinessatdistanceAstigmatismBlurrinessatalldista

5、ncesRefractiveErrorsHyperopia–far-sightednessTheeyeballaxisisshortRefractiveErrorsMyopia–near-sightednessTheeyeballistoolongChildhoodRefractiveErrorsVisuallysignificantrefractiveerrorsPercentagePre-schoolchildren5–710yearolds10–1218yearolds25–30Theincreaseisduetothedevelopmentofmyopia(near

6、-sightedness)EyeglassesOpticalcorrectionshouldbeconsideredto:PreventamblyopiaTreatamblyopiaTreatstrabismusImprovevisualacuityImprovevisualdiscomfortStrabismusStrabismusOcularmisalignmentEsotropiaInwardlydeviatingeyes-“crossedeyes”ExotropiaOutwardlydeviatingeyes-“wall-eyed”EsotropiaEsotropi

7、aExotropiaAmblyopiaDevelopsincriticalperiodBirthto7yearsYoungchildrenneedtolearnhowtoseeAnycausethatinterfereswithlearninghowtoseecanleadtoamblyopiaVisionlossislifelong–ifnottreatedAmblyopiaNotaprimaryconditionbutsecondaryto:StrabismusNeedforglassesStructurala