followingslidescontaindetailedinstructionscapturethemodifiedfieldseitherforcolourphotosfluoresceinangiographyThisexamplebeentogetherusingSpectraliswithlenssimplyforeaseproducingthistutorialThistutor ID: 955669
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7 Modified Field Digital Fundus PhotographyCapture TutorialVittorio Silvestri followingslidescontaindetailedinstructionscapturethemodifiedfields,eitherforcolourphotosfluoresceinangiographyThisexam
plebeentogetherusingSpectraliswithlens,simplyforeaseproducingthistutorialThistutorialsimplyshowsthecorrectpositioningtheopticdisctheframeforeachthefieldsThesetechniquescanappliedsystem,stillscamer
aSpectralis Introduction studieswherethefinalfieldsaremontagedproduceonelargecomposite,importantthattheregoodreferencepointthreemajorvesselseachimagehelpwiththealignmentwiderfieldlenses,suchthethe
SpectralisincludingopticdiscacceptablebestpracticeWhenusingthelenstheSpectralistheopticdiscpositionedthefield(asFigureThiswillthesameforothercamerasusinglenses The Fields Overview, 30/35 ° Lens
Figure 1 Positioning the fields cameraswithtiltpivotcapabilitiesandthepatientablefixatewiththefelloweye,roughlypositionfieldusingtheexternalfixatorthefineadjustmentsusingtiltpivotYoumayhaveuseanot
herfixationmethodforfieldtheinferiorfields,thepatientwilllookingdown,eyelashesproblemYoumayholdtheeyelidjustyoutaketheshotSuperiorfieldsareeasierthepatientlooking The Fields, Detailed Explanation,
55 ° Lens thenextslidesyouwillseedetailedexplanationhowpositioneachthefieldsimagethefieldcorrectlyplacedFORLENSPleasebaremindthatforlenstheareacapturedwillless,approximatelywherethewhitecirclesa
retheimagesWhenusingstillscamerasuchtheTopconTRCDX,youcanusethefieldviewinstead Field 1M: Optic Disc Askingthepatientlooktheexternalfixator,centrethetemporaledgetheopticdiscthefieldusingfunduscame
ra,thiswilltheintersectiontheocularcrosshairs Field 2: Macula SimplypivotthecameratowardsthetemporalareafromwithoutanyverticaladjustmentThefoveashouldpositionedjustbelowthecentrethefieldThishelpsa
voidpossiblecentralgreyartefactscreatedsomecameras Field 3M: Temporal to the macula Pivotthecamerafurthertowardthetemporalareapositionthemaculamidwaybetweenthecentrethefieldandthenasaledgethefield
,againwithoutverticaladjustmentYoumayusetheinternalfixatorachievethis Field 4: Superior temporal Centreopticdiscinframe,tiltcameradownwardsuntilopticdisciso’clockposition,pivotcameratowardste
mporalareapositiondiscinlowerrightcornerthefieldusinglens,positiondiscjustoutsideframe,makingsureifit’sallvisible,threecloselyarrangedretinalvesselsareshowing,inimagebelow Field 5: Inferior t
emporal Centreopticdiscinframe,tiltcameraupwardsuntiltheopticdisciso’clockposition,pivotcameratowardstemporalareapositiondiscinrightcornerthefieldusinglens,positiondiscjustoutsideframe,making
sureifit’sallvisible,threecloselyarrangedretinalvesselsareshowing,inimagebelow Field 6: Superior nasal Centreopticdiscinframe,tiltcameradownwardsuntilopticdisciso’clockposition,pivotcame
ratowardsnasalareapositiondiscinlowerleftcornerfieldusinglens,positiondiscjustoutsideframe,makingsurethatifit’sallvisible,threecloselyarrangedretinalvesselsareshowing,inimagebelow Field 7: In
ferior nasal Centreopticdiscinframe,tiltcameraupwardsuntiltheopticdisciso’clockposition,pivotcameratowardsnasalareapositiondiscinleftcornerfieldusinglens,positiondiscjustoutsideframe,makingsu
rethatifit’sallvisible,threecloselyarrangedretinalvesselsareshowing,inimagebelow Montaged Image Other Sample Montages thenextfewslidestherearesomeexamplespoorlycapturedfieldsetsExamplerequire
dmanualbestguessalignmentexamplesthecaptureextrafields,superiorinferiortheopticdiscwouldfillthosetheperipheralfieldsExamplesarewellcaptured,usingcamerawithcamera Example 1: Poor example, the 4 per
ipheral fields were manually positioned as best guess Example 2: Better example, all the fields montaged automatically, but the gap between the two superior and two inferior fields is unacceptable
Example 3: Fair example, the superior and inferior gap has closed but is still visible Example 4: Good example, taken with a 35field of view camera Example 5: Good example, taken with a 50field o