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NAO VOLUME 3 questions well answered to pass
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NAO VOLUME 3 questions well answered to pass
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NAO VOLUME 3 questions wellanswered to pass
The correct transposed RX for -1.00-.50x37 is? - correct answer ✔✔-1.50 + 0.50 x 127
The correct transposition for +2.00 -2.00 x 060 is? - correct 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: - correct answer ✔✔60 mm
A +3.00 sphere lens has a front base curve of +6.25. What is the back surface curve? - correct 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? - correct
answer ✔✔-8.25 -1.00
Moving the optical center of a plus lens inward from the correct PD results in _____ - correct answer
✔✔Base in prism
Where will the optical center appear in a lensometer when neutralizing a left lens for base in prism? -
correct answer ✔✔To the left of the target center
Glazing is a term used to indicate _____ - correct answer ✔✔A 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: - correct 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: - correct
answer ✔✔Angle 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 : - correct answer ✔✔not 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 - correct answer ✔✔OD -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 - correct answer ✔✔2.25 prism BU in OS
You are fitting 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?
RX: OU -2.25 -1.50 x 045 - correct answer ✔✔0.5 prism BI
A situation where the frame front is somewhat twisted, with the planes of the two lenses being out of
line with one another, is called: - correct answer ✔✔Skewed bridge
When a frame is said to have a parabolic curve (or positive face form), the following condition is meant: -
correct answer ✔✔The bridge of the frame is out further than then end pieces
If the lenses of a patient wearing -8.00 spheres are brought closer or his/her eyes, what if any effect will
this have on the lenses? - correct answer ✔✔Increase minus power effect
Slab-off is ground on the lens that has the _____in the 090 meridian: - correct answer ✔✔Weaker plus
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