and National Contact Lens
Examiners (ABO-NCLE)
Questions with Correct Answers
fibrousAtunicA-AAnswerAconsistsAofAtheAscleraAandAtheAcornea
vascularAtunicA-AAnswerAconsistsAofAtheAiris,Achoroid,AciliaryAbody,AresponsibleAforAnourishment
nervousAtunicA-
AAnswerAtheAinnerAlayerAofAphotoreceptorsAandAneuronsAwhichAconsistsAofAtheAretina
rodsAandAconesA-
AAnswerAnervousAtunicAorAneuralAlayerAcontainsAtheAspecialAphotoA(light)AreceptorsAknownAas
maculaA-
AAnswerAapproximatelyA120AmillionArodsAspreadAtowardsAtheAoutsideAofAtheAretinaAandAabout
A6AmillionAconesAconcentratedAnearAtheAcenter.AwhereAlightAwillAfocusAinAaAhealthyAeye
foveaA-AAnswerAeAhighestAconcentrationAofAconesAisAfoundAat,AcenterAofAtheAmacula
anteriorAchamberA-AAnswerAbetweenAtheAcorneaAandAtheAiris
posteriorAchamberA-AAnswerAbetweenAtheAirisAandAtheAlens
vitreousAchamberA-
AAnswerAfoundAbetweenAtheAretinaAandAtheAlensAandAisAfilledAwithAaAthickerAgel-
likeAsubstanceAcalledAvitreousAhumorAwhichAmaintainsAtheAshapeAofAtheAeye
corneaA-AAnswerALightAentersAtheAeyeAthroughAtheAtransparent,Adome
epitheliumA-
AAnswerATheAcorneaAconsistsAofAfiveAdistinctAlayers:A1.ATheAouterAmostAlayer,ArestsAonABowm
an'sAmembrane
, Bowman'sAMembraneA-AAnswerA2.ATheAnextAlayer,AwhichAactsAasAaAprotectiveAbarrier
stromaA-
AAnswerA3.AbetweenAtheAtwoAmembranesAmakesAupA90%AofAtheAthicknessAofAtheAcornea
Descemet'sAMembraneA-AAnswerA4.AseparatesAtheAstromaAandAtheAendothelium
endotheliumA-
AAnswerA5.ATheAinnerAmostAlayer,AremovesAwaterAfromAcornea,AhelpingAtoAkeepAtheAcorneaAcl
ear.
irisA-
AAnswerAamountAofAlightAallowedAthroughAtheApupilAisAcontrolledAby,AcoloredApartAofAtheAeye
TheAirisAhasAtwoAmuscles:A1.ATheAdilatorAmuscleA-
AAnswerAopensAtheAirisAallowingAmoreAlightAin
2.ATheAsphincterAmuscleA-AAnswerAclosesAtheAiris
crystallineAlensA-
AAnswerAJustAbehindAtheApupil,ApurposeAofAtheAlensAisAtoAfocusAlightAonAtheAretina
accommodationA-AAnswerATheAprocessAofAfocusingAonAobjectsAbasedAonAtheirAdistance
ciliaryAbodyA-AAnswerAlensAachievesAaccommodationAwithAtheAhelpAofAthe
zonulesA-AAnswerATheAciliaryAbodyAisAattachedAtoAlensAviaAfibrousAstrandsAcalled
PalpebraeA-AAnswerAAnotherAtermAforAtheAeyelid
MedialACanthusA-
AAnswerAThisAisAtheApointAwhereAtheAupperAandAlowerAeyelidsAmeetAnearAtheAnose.AInAlaym
anAterms,A"theAcornerAofAyourAeye."
LateralACanthusA-
AAnswerAThisAisAtheApointAwhereAtheAupperAandAlowerAeyelidsAmeetAtowardsAyourAear.