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ABO Practical exam question with complete solutions 2024
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ABO Practical exam question with complete solutions 2024
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ABO Practical exam question withcomplete solutions 2024
Single jVision j- jANSWER✓✓-corrects jfor jone jdistance
Multifocal j- jANSWER✓✓-Corrects jwith jtwo jor jmore jprescriptions j(or j'powers')
Bifocal j- jANSWER✓✓-lens jhaving jtwo jfocus jstrengths
Trifocal j- jANSWER✓✓-pertaining jto jhaving jthree jfocus jstrengths
Calculating jPrismatic jEffects j- jANSWER✓✓-obtained jat jthe jcenter jof jan joptical
jlens jby jproducing ja jdifference jin jedge jthickness, jeither jby jgrinding jthe jback
jsurface jat jan jangle jto jthe jfront jsurface jduring jlens jsurfacing jor, jif jthe jlens jhas
jsufficient jpower, jde-centering jthe joptical jcenter jof jthe jlens
Compounding jPrism j- jANSWER✓✓-BI j& jBI
BO j& jBO
BU j& jBD
Cancelling jPrism j- jANSWER✓✓-BI j& jBO
BD j& jBD
BU j& jBU
Prentice's jRule j- jANSWER✓✓-P=hcm jx jD
P=amount jof jprism jcreated
h= jnumber jof jcm jOC jmoved
cm= jcentimeters j(convert jto jmm, jdivide jby j10)
D= jpower jin jmeridian jwith jerror
Vertical jImbalance j- jANSWER✓✓-The jdifference jin jvertical jprism jpower jat jthe
jreading jlevel jin ja jpair jof jlenses.
OC jHeight's jby jlens j- jANSWER✓✓-SV j= j1/2 jof jB
Progressive j= jFitting jcross
FT j= j5mm jabove jsegment
Vertex jCompensation j- jANSWER✓✓-A jplus jlens jwhen jmoved jfarther jfrom jthe
jeye jgains jin jplus jpower
Distance jis j0 jwith jCL jbecause jthey jare jon jthe jeye
Vertex jcompensation jFormula j- jANSWER✓✓-De= jDl/(1 j+ jd jxDl)
, De= jdiopter jeffective jvalue jof jerror jcreated
D/= jlens jpower j(given jpower)
d= jamount jin jMETERS jlens jmoved jfrom jrefracted jposition jto jposition jlens jis
jworn
Keep jsign jfor jwhat jit jis j(+/-)
- jto jd jmeans jmoves jaway
Horizontal jCentration j- jANSWER✓✓-PD
Vertical jCentration j- jANSWER✓✓-OC
Horizontal j& jVertical jCentration jFormula j- jANSWER✓✓-Given jPD/OC j- jHuman
jPD/OC= jmm jmoved
Frame jPD jis jfound jby jadding jA+DBL
Power jin jOblique jMeridians j- jANSWER✓✓-Dt= j(sina)²x jDc j+Ds
Dt= jTotal jPower jwe jneed
(sina)²= jdegree jwe jhave jdegree jwe jneed
Dc= jcylinder jpower
Ds= jsphere jpower
Lensmeter j- jANSWER✓✓-is jan jophthalmic jinstrument. jIt jis jmainly jused jby
joptometrists jand jopticians jto jverify jthe jcorrect jprescription jin ja jpair jof
jeyeglasses, jto jproperly jorient jand jmark juncut jlenses, jand jto jconfirm jthe jcorrect
jmounting jof jlenses jin jspectacle jframes. j(also jknown jas ja jfocimeter jor
jvertometer)
Lens jMeasurement jDevices j- jANSWER✓✓-lens jclock, jcalipers, jmillimeter jruler,
jcircumference jgauge
Lens jClock j- jANSWER✓✓-is jused jto jmeasure jthe jsurface jpowers jbase jcurve jof ja
jlens
Lens jCalipers j- jANSWER✓✓-Measures jthickness jof jlenses jin jmm
Millimeter jruler j- jANSWER✓✓-measures jinterpupillary jdistance, jor jseg jheights,
jor jOC jheights
Circumference jgauge j- jANSWER✓✓-For jquick jand jaccurate jmeasurements jof
jlenses jor jpatterns.
Corneal jreflex jPupilometer j- jANSWER✓✓-for jprecisely jmeasuring jand jdigitally
jrecording jpupillary jdistances. jUsed jfor jmeasuring jof jmonocular jand jbinocular
Hand jTools j- jANSWER✓✓-Screwdrivers, jneedle-nose jpliers, jtweezers, jfiles
scratchless jscrewdriver j- jANSWER✓✓-for jworking jon jdrill jmount jor jfacetted
jlenses
pickup jscrewdriver j- jANSWER✓✓-jaws jwith jspring jtension jto jhold jscrews jwhile
jyou jput jthem jin jplace, javailable jwith jeither jtype jblade
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