NAO VOLUME 3 Exam Questions & Answers 100% Correct!!
The correct transposed RX for -1.00-.50x37 is? - ANSWERS-1.50 + 0.50 x 127
The correct transposition for +2.00 -2.00 x 060 is? - ANSWERSPlano +2.00 x 150
An uncut lens must be at least _______ mm in diameter to allow the edging of a 54 m...
The correct transposed RX for -1.00-.50x37 is? - ANSWERS-1.50 + 0.50 x 127
The correct transposition for +2.00 -2.00 x 060 is? - ANSWERSPlano +2.00 x 150
An uncut lens must be at least _______ mm in diameter to allow the edging of a 54 mm round lens
decentered 3 mm in: - ANSWERS60 mm
A +3.00 sphere lens has a front base curve of +6.25. What is the back surface curve? - ANSWERS-3.25
A -2.00 -1.00 x 045 lens has a front base curve of +6.25. What are the back surface curves? - ANSWERS-
8.25 -1.00
Moving the optical center of a plus lens inward from the correct PD results in _____ - ANSWERSBase in
prism
Where will the optical center appear in a lensometer when neutralizing a left lens for base in prism? -
ANSWERSTo the left of the target center
Glazing is a term used to indicate _____ - ANSWERSA defect that occurs when an anti-reflective lens is
tinted
Frequently, bicentric grinding (slab-off) is used as a means of obtaining prism in the reading field to
correct induced prism imbalance. The usual correction during the fabrication process is achieved by
grinding prism in the following direction: - ANSWERSup
, A patient stops in to see you for adjustment of his glasses. After careful inspection you find the only thing
wrong that there is too much pantoscopic tilt. To make the necessary adjustment you will: -
ANSWERSAngle the temples upward from the end pieces
If the RX is +2.00 -4.00 x 135, it would be necessary to decenter the lens _____to create 1.00 prism base
in : - ANSWERSnot possible
Rewrite the RX below, which is prescribed for a patient afflicted with double vision, so as to make better
balanced lenses:
OD -1.00 -0.50 x 090 5.00 BU
OS -1.25 - 0.50 x 090 1.00 BD - ANSWERSOD -1.00 -0.50 x 090 3.00 prism BU
OS -1.25 -0.50x 090 3.00 prism BD
Correct the imbalance in the following prescription by use of slab-off. Reading level is 10 mm:
OD +5.00 -2.00 x 090
OS +2.25 -3.00 x 090 - ANSWERS2.25 prism BU in OS
The lens aberration that produces a shorter focal length for rays near the edge of the lens than rays near
the optical axis is called: - ANSWERSSpherical aberration
The aberration affecting image shape when wearing high minus lenses is called: - ANSWERSbarrel
distortion
What type of prismatic effect is easiest to tolerate at the near point? - ANSWERSBase in
You can eliminate the effects of pantoscopic angle by: - ANSWERSRaising the optical center by 1/2 the
amount of tilt
1 base up ad 2 base in for a left eye would be found in which quadrant? - ANSWERSII
2 base down and 2 base out for left eye would be found in which quadrant? - ANSWERSIV
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