NAO VOLUME 3 Exam Questions With
Verified Solutions
The ccorrect ctransposed cRX cfor c-1.00-.50x37 cis? c- ccorrect canswers✔✔-1.50 c+ c0.50
cx c127
The ccorrect ctransposition cfor c+2.00 c-2.00 cx c060 cis? c- ccorrect canswers✔✔Plano
c+2.00 cx c150
An cuncut clens cmust cbe cat cleast c_______ cmm cin cdiameter cto callow cthe cedging cof
ca c54 cmm cround clens cdecentered c3 cmm cin: c- ccorrect canswers✔✔60 cmm
A c+3.00 csphere clens chas ca cfront cbase ccurve cof c+6.25. cWhat cis cthe cback csurface
ccurve? c- ccorrect canswers✔✔-3.25
A c-2.00 c-1.00 cx c045 clens chas ca cfront cbase ccurve cof c+6.25. cWhat care cthe cback
csurface ccurves? c- ccorrect canswers✔✔-8.25 c-1.00
Moving cthe coptical ccenter cof ca cplus clens cinward cfrom cthe ccorrect cPD cresults cin
c_____ c- ccorrect canswers✔✔Base cin cprism
Where cwill cthe coptical ccenter cappear cin ca clensometer cwhen cneutralizing ca cleft clens
cfor cbase cin cprism? c- ccorrect canswers✔✔To cthe cleft cof cthe ctarget ccenter
Glazing cis ca cterm cused cto cindicate c_____ c- ccorrect canswers✔✔A cdefect cthat
coccurs cwhen can canti-reflective clens cis ctinted
Frequently, cbicentric cgrinding c(slab-off) cis cused cas ca cmeans cof cobtaining cprism cin
cthe creading cfield cto ccorrect cinduced cprism cimbalance. cThe cusual ccorrection cduring
cthe cfabrication cprocess cis cachieved cby cgrinding cprism cin cthe cfollowing cdirection: c-
ccorrect canswers✔✔up
A cpatient cstops cin cto csee cyou cfor cadjustment cof chis cglasses. cAfter ccareful
cinspection cyou cfind cthe conly cthing cwrong cthat cthere cis ctoo cmuch cpantoscopic ctilt.
cTo cmake cthe cnecessary cadjustment cyou cwill: c- ccorrect canswers✔✔Angle cthe
ctemples cupward cfrom cthe cend cpieces
If cthe cRX cis c+2.00 c-4.00 cx c135, cit cwould cbe cnecessary cto cdecenter cthe clens
c_____to ccreate c1.00 cprism cbase cin c: c- ccorrect canswers✔✔not cpossible
, Rewrite cthe cRX cbelow, cwhich cis cprescribed cfor ca cpatient cafflicted cwith cdouble
cvision, cso cas cto cmake cbetter cbalanced clenses:
OD c-1.00 c-0.50 cx c090 c5.00 cBU
OS c-1.25 c- c0.50 cx c090 c1.00 cBD c- ccorrect canswers✔✔OD c-1.00 c-0.50 cx c090 c3.00
cprism cBU
OS c-1.25 c-0.50x c090 c3.00 cprism cBD
Correct cthe cimbalance cin cthe cfollowing cprescription cby cuse cof cslab-off. cReading
clevel cis c10 cmm:
OD c+5.00 c-2.00 cx c090
OS c+2.25 c-3.00 cx c090 c- ccorrect canswers✔✔2.25 cprism cBU cin cOS
You care cfitting ca cpatient cwith ca cstock cframe, c24 cDBL, c44 ceve csize cand c137 cmm
cskull ctemples. cThe cdistance cPD cis conly c62 cmm. cIf cby csome cunfortunate cerror cthe
clenses care cnot cdecentered cat call, chow cmuch cprism cis ccreated cin ceach ceye?
RX: cOU c-2.25 c-1.50 cx c045 c- ccorrect canswers✔✔0.5 cprism cBI
A csituation cwhere cthe cframe cfront cis csomewhat ctwisted, cwith cthe cplanes cof cthe ctwo
clenses cbeing cout cof cline cwith cone canother, cis ccalled: c- ccorrect canswers✔✔Skewed
cbridge
When ca cframe cis csaid cto chave ca cparabolic ccurve c(or cpositive cface cform), cthe
cfollowing ccondition cis cmeant: c- ccorrect canswers✔✔The cbridge cof cthe cframe cis cout
cfurther cthan cthen cend cpieces
If cthe clenses cof ca cpatient cwearing c-8.00 cspheres care cbrought ccloser cor chis/her
ceyes, cwhat cif cany ceffect cwill cthis chave con cthe clenses? c- ccorrect
canswers✔✔Increase cminus cpower ceffect
Slab-off cis cground con cthe clens cthat chas cthe c_____in cthe c090 cmeridian: c- ccorrect
canswers✔✔Weaker cplus
Which cof cthe cfollowing careas cis cnot ca cfactor cin cdetermining cvertical cimbalance? c-
ccorrect canswers✔✔Add cpower
A clens cdispersing cwhite clight cinto cits ccomponent ccolors cis can cexample cof c: c-
ccorrect canswers✔✔Chromatic caberration
The clens caberration cthat cproduces ca cshorter cfocal clength cfor crays cnear cthe cedge
cof cthe clens cthan crays cnear cthe coptical caxis cis ccalled: c- ccorrect
canswers✔✔Spherical caberration
The caberration caffecting cimage cshape cwhen cwearing chigh cminus clenses cis ccalled: c-
ccorrect canswers✔✔barrel cdistortion
Verified Solutions
The ccorrect ctransposed cRX cfor c-1.00-.50x37 cis? c- ccorrect canswers✔✔-1.50 c+ c0.50
cx c127
The ccorrect ctransposition cfor c+2.00 c-2.00 cx c060 cis? c- ccorrect canswers✔✔Plano
c+2.00 cx c150
An cuncut clens cmust cbe cat cleast c_______ cmm cin cdiameter cto callow cthe cedging cof
ca c54 cmm cround clens cdecentered c3 cmm cin: c- ccorrect canswers✔✔60 cmm
A c+3.00 csphere clens chas ca cfront cbase ccurve cof c+6.25. cWhat cis cthe cback csurface
ccurve? c- ccorrect canswers✔✔-3.25
A c-2.00 c-1.00 cx c045 clens chas ca cfront cbase ccurve cof c+6.25. cWhat care cthe cback
csurface ccurves? c- ccorrect canswers✔✔-8.25 c-1.00
Moving cthe coptical ccenter cof ca cplus clens cinward cfrom cthe ccorrect cPD cresults cin
c_____ c- ccorrect canswers✔✔Base cin cprism
Where cwill cthe coptical ccenter cappear cin ca clensometer cwhen cneutralizing ca cleft clens
cfor cbase cin cprism? c- ccorrect canswers✔✔To cthe cleft cof cthe ctarget ccenter
Glazing cis ca cterm cused cto cindicate c_____ c- ccorrect canswers✔✔A cdefect cthat
coccurs cwhen can canti-reflective clens cis ctinted
Frequently, cbicentric cgrinding c(slab-off) cis cused cas ca cmeans cof cobtaining cprism cin
cthe creading cfield cto ccorrect cinduced cprism cimbalance. cThe cusual ccorrection cduring
cthe cfabrication cprocess cis cachieved cby cgrinding cprism cin cthe cfollowing cdirection: c-
ccorrect canswers✔✔up
A cpatient cstops cin cto csee cyou cfor cadjustment cof chis cglasses. cAfter ccareful
cinspection cyou cfind cthe conly cthing cwrong cthat cthere cis ctoo cmuch cpantoscopic ctilt.
cTo cmake cthe cnecessary cadjustment cyou cwill: c- ccorrect canswers✔✔Angle cthe
ctemples cupward cfrom cthe cend cpieces
If cthe cRX cis c+2.00 c-4.00 cx c135, cit cwould cbe cnecessary cto cdecenter cthe clens
c_____to ccreate c1.00 cprism cbase cin c: c- ccorrect canswers✔✔not cpossible
, Rewrite cthe cRX cbelow, cwhich cis cprescribed cfor ca cpatient cafflicted cwith cdouble
cvision, cso cas cto cmake cbetter cbalanced clenses:
OD c-1.00 c-0.50 cx c090 c5.00 cBU
OS c-1.25 c- c0.50 cx c090 c1.00 cBD c- ccorrect canswers✔✔OD c-1.00 c-0.50 cx c090 c3.00
cprism cBU
OS c-1.25 c-0.50x c090 c3.00 cprism cBD
Correct cthe cimbalance cin cthe cfollowing cprescription cby cuse cof cslab-off. cReading
clevel cis c10 cmm:
OD c+5.00 c-2.00 cx c090
OS c+2.25 c-3.00 cx c090 c- ccorrect canswers✔✔2.25 cprism cBU cin cOS
You care cfitting ca cpatient cwith ca cstock cframe, c24 cDBL, c44 ceve csize cand c137 cmm
cskull ctemples. cThe cdistance cPD cis conly c62 cmm. cIf cby csome cunfortunate cerror cthe
clenses care cnot cdecentered cat call, chow cmuch cprism cis ccreated cin ceach ceye?
RX: cOU c-2.25 c-1.50 cx c045 c- ccorrect canswers✔✔0.5 cprism cBI
A csituation cwhere cthe cframe cfront cis csomewhat ctwisted, cwith cthe cplanes cof cthe ctwo
clenses cbeing cout cof cline cwith cone canother, cis ccalled: c- ccorrect canswers✔✔Skewed
cbridge
When ca cframe cis csaid cto chave ca cparabolic ccurve c(or cpositive cface cform), cthe
cfollowing ccondition cis cmeant: c- ccorrect canswers✔✔The cbridge cof cthe cframe cis cout
cfurther cthan cthen cend cpieces
If cthe clenses cof ca cpatient cwearing c-8.00 cspheres care cbrought ccloser cor chis/her
ceyes, cwhat cif cany ceffect cwill cthis chave con cthe clenses? c- ccorrect
canswers✔✔Increase cminus cpower ceffect
Slab-off cis cground con cthe clens cthat chas cthe c_____in cthe c090 cmeridian: c- ccorrect
canswers✔✔Weaker cplus
Which cof cthe cfollowing careas cis cnot ca cfactor cin cdetermining cvertical cimbalance? c-
ccorrect canswers✔✔Add cpower
A clens cdispersing cwhite clight cinto cits ccomponent ccolors cis can cexample cof c: c-
ccorrect canswers✔✔Chromatic caberration
The clens caberration cthat cproduces ca cshorter cfocal clength cfor crays cnear cthe cedge
cof cthe clens cthan crays cnear cthe coptical caxis cis ccalled: c- ccorrect
canswers✔✔Spherical caberration
The caberration caffecting cimage cshape cwhen cwearing chigh cminus clenses cis ccalled: c-
ccorrect canswers✔✔barrel cdistortion
