视光学理论与方法：裂隙灯和前房角镜.pdf

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1、2015/9/22Biomicroscopy&GonioscopyJingjingXuSchoolofOphthalmology&Optometry2015-09-221Ocularexams•Externalexam•Biomicroscopy•Gonio-lensexam•IOPmeasurement•Opthalmoscopy212015/9/22Externalobservation•ObservationEyelid,Conj.,sclera,lacrimalsystem,orbitetal.

2、AnatomicabnormityClueofdiagnosis•Checking322015/9/22Eg.132015/9/22Eg.17二、BiomicroscopyStructure•Illuminationarm•Observationarm•Mechanicalsupportsystem842015/9/22Illuminationarm9Illuminationarm•Lamp-house•Slitheight/widthcontrol,slitrotationWidth：0-8mmDia

3、phragm：0.2、2、3、5、8mm•FiltersRed-freefilter,cobalt-bluefilter,meutraldensityetal.1052015/9/22ObservationarmBinocularmicroscopeAdjustablemagnification•6X-10Xgeneralstructure•16X-25Xlayers•40Xdetails11MechanicalsupportsystemPatientsupportInstrumentstage1262

4、015/9/22Biomicroscopy•Uses–Healthofanteriorsegment–anteriorchamberangledepth–Contactlensfits–Posteriorsegmentwithadditionofhighpluslens–intraocularpressurewithGoldmanntonometer–Recordtheabnormitywithphotoorvideo13Biomicroscopy•Desire–Highmagnification–Bi

5、nocularviewing(depth)–Easyabilitytochangeangleofincidence–Slitoflightwouldallowcrosssectionalviews(cornea/lens)1472015/9/221582015/9/22Anteriorsegmentexam•Eyelid•Conjunctiva•Sclera•Tearfilm•Cornea•Anteriorchamber•Iris•Lens•Anteriorvitreousbody17Biomicros

6、copySet-up•Washhands•AdjusteyepiecesandPD•Checkslitcontrols,magnificationadjustment,filters•Checkthecoaxalsystemandfocusetheoculars1892015/9/22Focusingtheoculars•Placefocusingrodinwell19Focusingtheoculars•Lowormediummagnification--6-16x•Narrowslitwidth•A

7、ddplustorightocular(counterclockwise)•Decreaseplusuntilfirstfocus•Repeatwithothereye20102015/9/22Illuminations•Directfocal–Parallelepiped–Opticsection–Conicalbeam•DiffuseIlluminations•Indirect–DirectRetro–IndirectRetro–SpecularReflection–ScleroticScatter

8、112015/9/22Illuminations•Parfocal–Scopeandlightarefocusedinsameplace23Howcanyoumakethescopenon-parfocal?A.Changewheretheilluminationsystemisfocused–Takethemirroroutofclickstop24122015/9/22Howcanyoumakethescopenon-parfocal?