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Exam (elaborations)

COMPREHENSIVE REVIEW FABRICATION WITH CORRECT QUESTIONS AND ANSWERS

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COMPREHENSIVE REVIEW FABRICATION WITH CORRECT QUESTIONS AND ANSWERS

Institution
CR 39
Course
CR 39

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COMPREHENSIVE REVIEW
FABRICATION WITH CORRECT
QUESTIONS AND ANSWERS
how4much4decentration4per4lens4is4required4to4correctly4mark4these4lenses4for4e
dging:
R4+1.004-1.004x70
L4-1.004-1.004x100
A=524B=494DBL=164PD=704-4answer-1mm4out

for4the4following4frame4and4wearer4PD4what4is4the4minimum4blank4size4required
4if42mm4is4allowed4for4lens4chipping

A=494B=404C=474ED=544DBL=204PD=614-4answer-64

how4much4decentration4per4lens4is4required4for4the4following4RX4if4it4is4to4be4us
ed4for4reading4glasses4only?
R4+3.254-0.504x90
L4+3.004-0.254x90
a=524b=474ed=574dbl=204pd=65/614-4answer-4.0mm

a4bifocal4for4the4right4eye4is4placed4convex4side4up4on4the4centration4device4so
4it4may4be4blocked4directly.4if4a=474dbl=164and4pd=61/574where4is4the4centre4of
4the4segment4in4reference4to4the4centre4of4the4grid4-4answer-to4the4right

in4lens4layout4a4blended4bifocal4lens4is4centered4in4a4manner4most4similar4to4a4
-4answer-round4segment4lens

if4a42.5mm4variation4in4near4PD4is4considered4to4be4within4accepted4standards4
what4are4the4largest4and4smallest4near4pds4that4will4fall4within4these4standards4f
or4a4wearer4with4a4pd=59/654-4answer-58.54/453.5

which4bifocal4can4be4marked4for4blocking4without4having4been4spotted4-4answer-
flat4top4and4curve4top

a4frame4has4the4following4measurements
a=484b=384dbl=204ed=48
the4px4pd4is464
if4the4lens4is4minus4where4will4it4be4thcker4-4answer-temporally
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Institution
CR 39
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Uploaded on
April 2, 2026
Number of pages
2
Written in
2025/2026
Type
Exam (elaborations)
Contains
Questions & answers

Subjects

  • comprehensive review fabrication with correct ques
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