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NAO VOLUME 3 Questions with
Correct Answers for Specific Exam
Mail
The correct transposed RX for -1.00-.50x37 is?
Ans: -1.50 + 0.50 x 127
The correct transposition for +2.00 -2.00 x 060 is?
Ans: 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:
Ans: 60 mm
A +3.00 sphere lens has a front base curve of +6.25. What
is the back surface curve?
Ans: -3.25
A -2.00 -1.00 x 045 lens has a front base curve of +6.25.
What are the back surface curves?
Pretest - Stuvia US
,2
Ans: -8.25 -1.00
Moving the optical center of a plus lens inward from the
correct PD results in _____
Ans: Base in prism
Where will the optical center appear in a lensometer
when neutralizing a left lens for base in prism?
Ans: To the left of the target center
Glazing is a term used to indicate _____
Ans: 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:
Pretest - Stuvia US
, 3
Ans: 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:
Ans: 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 :
Ans: 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
Ans: OD -1.00 -0.50 x 090 3.00 prism BU
OS -1.25 -0.50x 090 3.00 prism BD
Pretest - Stuvia US
NAO VOLUME 3 Questions with
Correct Answers for Specific Exam
The correct transposed RX for -1.00-.50x37 is?
Ans: -1.50 + 0.50 x 127
The correct transposition for +2.00 -2.00 x 060 is?
Ans: 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:
Ans: 60 mm
A +3.00 sphere lens has a front base curve of +6.25. What
is the back surface curve?
Ans: -3.25
A -2.00 -1.00 x 045 lens has a front base curve of +6.25.
What are the back surface curves?
Pretest - Stuvia US
,2
Ans: -8.25 -1.00
Moving the optical center of a plus lens inward from the
correct PD results in _____
Ans: Base in prism
Where will the optical center appear in a lensometer
when neutralizing a left lens for base in prism?
Ans: To the left of the target center
Glazing is a term used to indicate _____
Ans: 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:
Pretest - Stuvia US
, 3
Ans: 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:
Ans: 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 :
Ans: 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
Ans: OD -1.00 -0.50 x 090 3.00 prism BU
OS -1.25 -0.50x 090 3.00 prism BD
Pretest - Stuvia US
