Certified Ophthalmic Technician Exam Review - Cot Ophthalmology Chapter 4 Visual Fields Questions with Correct Answers 2025

Certified Ophthalmic Technician Exam Review -
Cot Ophthalmology Chapter 4 Visual Fields
Questions with Correct Answers 2025
EachRmmRonRtheRretinaRisRequalRtoRhowRmanyRdegreesRonRtheRvisualRfield?R-RCORRECTRANSWERR-
5Rdegrees



TheRlightRreceptorRcellsRofRtheRretinaRareRthe:R-RCORRECTRANSWERR-RodsRandRcones



AnRobjectRonRtheRpatient'sRrightRwillRbeRperceivedRbyRtheRpatient's:R-RCORRECTRANSWERR-
temporalRretinaROSRandRnasalRretinaROD



TheRnerveRfibersRareRaxonRextensionsRofRthe:R-RCORRECTRANSWERR-GanglionRcells



TheRautonomicRpatternRofRtheRnerveRfibersRproducesRvisualRfieldRdefects:R-RCORRECTRANSWERR-
ThatRcorrespondRtoRtheRlocationRofRtheRnerveRfibers



TheR"blindRspot"RasRplottedRonRaRvisualRfieldRtestRcorrespondsRto:R-RCORRECTRANSWERR-
TheRopticRdisc



TheRsizeRofRtheRaverageRblindRspotRis:R-RCORRECTRANSWERR-
5.5RdegreesRwideRandR7.5RdegreesRhigh



OnRtheRvisualRfield,RtheRaverageRblindRspotRisRlocated:R-RCORRECTRANSWERR-
15RdegreesRtemporalRtoRfixation



IfRyouRincreaseRtheRvisualRfieldRtestingRdistance,RtheRblindRspotRwill:R-RCORRECTRANSWERR-
GetRlargerRinRcmRbutRremainRtheRsameRinRdegrees

,whatRhappensRatRtheRopticRchasm?R-RCORRECTRANSWERR-
nasalRnerveRfibersRfromReachReyeRcrossRoverRtoRtheRoppositeRside



TheRglandRthatRliesRinRtheRchiasmRregionRandRcanRhaveRaRdirectRimpactRonRtheRvisualRfieldRisRthe:R-
RCORRECTRANSWERR-pituitaryRgland




TheRcharacteristicRvisualRfieldRdefectRdueRtoRaRlesionRatRtheRchiasmRis:R-RCORRECTRANSWERR-
biRtemporalRhemianopsiaR(partialRblindnessRinRhalfRtheRvisualRfield)



AfterRnerveRfibersRcrossRatRtheRchiasm,RtheyRpassRnextRthroughRthe:R-RCORRECTRANSWERR-
OpticRtract



AsRtheRnerveRfibersRpassRthroughRtheRopticRtract,Rthey:R-RCORRECTRANSWERR-
Rotate,RthusRchangingRposition



AfterRleavingRtheRopticRtract,RtheRnerveRfibersRbundleRtogetherRatRaR"relayRstation"RknownRasRthe:R-
RCORRECTRANSWERR-LateralRgeniculateRbody




TheRlayersRofRtheRlateralRgeniculateRbodyRnucleusRareRdividedRsoRthatRhalfRofRtheRlayersRareRmadeR
upRofRcrossedRfibers,RandRhalfRareRmadeRupRofRuncrossedRfibers.RHowRmanyRlayersRareRthere?R-
RCORRECTRANSWERR-Six




WhichRisRnotRtrueRregardingRtheRnerveRfibersRonceRtheyRexitRtheRlateralRgeniculateRbody?R-
RCORRECTRANSWERR-theRtractRcontinuesRtoRrotate




VisualRnerveRfibersRterminateRatRthe:R-RCORRECTRANSWERR-occipitalRcortex

, VisualRfieldRdefectsRbecomeRmoreRcongruous:R-RCORRECTRANSWERR-
TheRcloserRtheRlesionRisRtoRtheRoccipitalRcortex



SensoryRinputR(lightRimpulses)RonRtheRpatient'sRleftRisRtransmittedRtoRthe:R-RCORRECTRANSWERR-
RightRsideRofRtheRbrain



TheRboundaryRofRanRareaRthatRrespondsRtoRtheRsameRstimulusRintensityRisRcalledRan(n):R-
RCORRECTRANSWERR-Isopter




AnRareaRinsideRaRvisualRfieldRisopterRthatRdoesRnotRrespondRtoRanyRofRtheRtargetsRavailableRonRthatR
particularRmachineRisRtermedRa:R-RCORRECTRANSWERR-Scotoma



"AtRthreshold"RmeansRthatRtheRpatientRrespondsRtoRaRgivenRstimulusRinRtheRsameRarea:R-
RCORRECTRANSWERR-50%RofRtheRtime




AnRapostilbR(obsoleteRmeasureRofRillumination)RisRaRmeasurementRof:R-RCORRECTRANSWERR-
LightRintensity



TheRarbitraryRdecibelRunitRisRusedRtoRdenoteRstimulusRintensityRin:R-RCORRECTRANSWERR-
AutomatedRperimetry



TheRdecibelRunitRisRconsideredRarbitraryRbecause:R-RCORRECTRANSWERR-
ItRmayRdifferRfromRoneRmachineRtoRanother



TheRdecibelRscaleRisRdependentRon:R-RCORRECTRANSWERR-
TheRmaximumRintensityRofRtheRmachine'sRstimulus



TheRhigherRtheRdecibelRrating:R-RCORRECTRANSWERR-TheRdimmerRtheRlightRintensity