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NAO VOLUME 3 EXAM QUESTIONS WITH VERIFIED ANSWERS 2025/2026
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NAO VOLUME 3 EXAM QUESTIONS WITH VERIFIED ANSWERS 2025/2026...
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The correct transposed RX for -1.00-.50x37 is? - ANSWER -1.50 + 0.50 x 127The correct transposition for +2.00 -2.00 x 060 is? - ANSWER Plano +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: - ANSWER 60 mm
A +3.00 sphere lens has a front base curve of +6.25. What is the back surface
curve? - ANSWER -3.25
A -2.00 -1.00 x 045 lens has a front base curve of +6.25. What are the back
surface curves? - ANSWER -8.25 -1.00
Shifting the optical center of a plus lens inward from the correct PD induces
_____ - ANSWER Base in prism
The location the optical center will appear in a lensometer when neutralizing a
left lens for base in prism. - ANSWER To the left of the target center
Glazing is a term used to indicate _____ - ANSWER A defect that occurs
when an anti-reflective lens is tinted
, Bicentric grinding-slab-off-is often used to introduce prism in the reading field
as a method of correcting induced prism imbalance. The normal correction at
the time of fabrication is obtained by grinding prism in the following direction:
- ANSWER up
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: - ANSWER Angle the temples
upward from the end pieces
If the RX is +2.00 -4.00 x 135, it would be required to decenter the lens _____to
make 1.00 prism base in : - ANSWER not possible
Rewrite the RX below, prescribed for a patient suffering with double vision, to
have better balanced lenses:
OD -1.00 -0.50 x 090 5.00 BU
OS-1.25 - 0.50 x 090 1.00 BD -
OD-1.00 -0.50 x 090 3.00 prism BU
OS -1.25 -0.50x 090 3.00 prism BD
The following prescription is imbalanced to the point that the patient cannot
tolerate the glasses. Correct this imbalance with slab-off. Reading level is 10
mm:
OD +5.00 -2.00 x 090
OS +2.25 -3.00 x 090 - ANSWER 2.25 prism BU in OS
You are dispensing to a patient with a stock frame, 24 DBL, 44 eve size and 137
mm skull temples. The distance PD is only 62 mm. If by some unfortunate error
the lenses are not decentered at all, how much prism is created in each eye?
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