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1、BinocularVisionSchoolofoptometryandophthalmologyThemechanismofaccommodation為什么我們有兩只眼睛?SpareeyeBetterPerceptionRichervisionBiggerVFstereopsis(binocularsummation)Spareeye外傷的可能性;眼科疾病老年性黃斑變性3600visualfield1200300300為什么我們只有兩只眼睛EPrinciplevisualdirectionSecondaryvisualdirection視網(wǎng)膜對(duì)應(yīng)點(diǎn)ABPabmb’a’m’ODOG一對(duì)眼
2、睛可能帶來的問題斜視弱視/抑制復(fù)視雙眼視覺功能異?;A(chǔ)知識(shí)復(fù)習(xí):臨床基本測(cè)量或基本參數(shù)調(diào)節(jié)視標(biāo)target視標(biāo)距離和調(diào)節(jié)量amountofaccommodation調(diào)節(jié)幅度amplitudeofaccommodation調(diào)節(jié)幅度與年齡Amp.Acc.vsAge單眼調(diào)節(jié)時(shí),另一眼的調(diào)節(jié)量binocularacc.調(diào)節(jié)靈活度acc.facility視標(biāo)>最小可見視標(biāo)上一、兩行;距離和調(diào)節(jié)的倒數(shù)關(guān)系調(diào)節(jié)幅度vs.年齡調(diào)節(jié)幅度的最小公式15-0.25xage舒適閱讀和調(diào)節(jié)儲(chǔ)備的關(guān)系:調(diào)節(jié)需求>=1/2調(diào)節(jié)幅度舉例:調(diào)節(jié)幅度=5D舉例近物遠(yuǎn)物調(diào)節(jié)靈活度acc.facility近物遠(yuǎn)物調(diào)節(jié)刺激和調(diào)
3、節(jié)反應(yīng)Acc.Stimulusvs.Acc.response總結(jié):調(diào)節(jié)功能調(diào)節(jié)視標(biāo)距離和調(diào)節(jié)量調(diào)節(jié)幅度調(diào)節(jié)幅度與年齡單眼調(diào)節(jié)時(shí),另一眼的調(diào)節(jié)量調(diào)節(jié)靈活度調(diào)節(jié)刺激和調(diào)節(jié)反應(yīng)復(fù)習(xí):輻輳功能/融像功能復(fù)習(xí):輻輳功能測(cè)量和基本數(shù)據(jù)NPC測(cè)量方式基本參數(shù)眼球輻輳量的表達(dá)?1m1cm復(fù)習(xí):計(jì)算輻輳度復(fù)習(xí):計(jì)算輻輳度1cm/1m140cmPd=60mmAnswer:15生理性復(fù)視生理性復(fù)視什么是隱斜?隱斜和斜視的區(qū)別斜視?úD±íaD±é?D±??D±無隱斜(ortho)cachesêó?áêó?áODOGODOG內(nèi)隱斜cachesêó?áODOGODOG如何測(cè)量隱斜?如何測(cè)量隱斜?最常用的方法Ma
4、ddox法VonGraefe法Maddox桿Maddox桿Maddox桿Maddox桿M-1Maddox桿M-2Maddox桿M-3ODOSODOSODOS隱斜的測(cè)量方法之一VonGraefe方法ODOS12BI6BUDoctor’sviewEESeenbyODSeenbyOSdecreasethe12BIontheOD;LookatthelowerE,feeltheupEmovinguntilitisalittlebitover,movebackEESeenbyODSeenbyOSdecreasethe12BIontheOD;LookatthelowerE,feeltheupEmov
5、inguntilitisalittlebitover,movebackEESeenbyODSeenbyOSdecreasethe6BUontheOS;LookattheupperE,feelthelowerEmovinguntilitisalittlebitover,movebackEESeenbyODSeenbyOSdecreasethe6BUontheOS;LookattheupperE,feelthelowerEmovinguntilitisalittlebitover,movebackffffNegativefusionalvergenceBI:負(fù)融像測(cè)量Positivefus
6、ionalvergenceBO:正融像測(cè)量ffffVergencemeasurementBaseInfornegativefusionalvergenceBaseoutforpositivefusionalvergenceHorizontalvergencesaremeasuredbothatdistanceandnearVergencemeasurementLookthetarget,report:BlurpointBreakpointRecoverypointRecord:DistBO9/19/10要點(diǎn)雙眼的最大優(yōu)點(diǎn)?調(diào)節(jié)調(diào)節(jié)和距離的關(guān)系調(diào)節(jié)刺激和調(diào)節(jié)反應(yīng)調(diào)節(jié)靈活度輻輳輻輳量的計(jì)算
7、隱斜和斜視隱斜測(cè)量隱斜的正常值BI/BO提問一近視患者(OU:-1.00D),配戴全矯眼鏡,注視25cm的視標(biāo),調(diào)節(jié)多少?一近視患者(OU:-1.00D),未配戴全矯眼鏡,注視25cm的視標(biāo),調(diào)節(jié)多少?提問一近視患者(OD:-2.00D,OS:-1.00D),全矯下,遮蓋左眼,右眼注視25cm的視標(biāo),右眼調(diào)節(jié)量?,左眼調(diào)節(jié)量?提問瞳距60mm,正視、正位,兩眼注視40cm的視標(biāo),問此時(shí)輻輳量為多少?此時(shí),遮蓋右眼,注視距離不變,輻輳量多少?若該