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NAO (Physics) BOOK TEST REVIEW QUESTIONS AND ANSWERS
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NAO (Physics) BOOK TEST REVIEW QUESTIONS AND ANSWERS
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NAO (Physics) BOOK TEST REVIEWQUESTIONS AND ANSWERS.
An excellent material for a patient with keratoconus would be:
Verified Answer -Fluor Silicone Acrylate
A prism ballast RGP lens requires how much prism for proper orientation?
Verified Answer -0.75 to 1.50 D
Which of the following could be considered in the fitting of a keratoconus
patient?
1.) Aspheric
2.) McGuire
3.) Soper
4.) Tangent Streak
Verified Answer -1, 2, & 3
The following soft lens is placed on patient's eye: 8.4 -2.00 14.2
An over-refraction is performed with the following results:
-1.00 -0.50 x 174
which of the following lens parameters would you order for the patients?
Verified Answer -8.4 -3.25 14.2
,Given the following information: K's 45.00 @ .00 @ 90 Rx -3.00 +1.00
x 180
Upper lid positioned at the superior limbus
Which of the following set of lens specifications would best simulate an
intrapalpebral rigid lens fitting?
Verified Answer -44.50 -2.5 8.5
Given the following information, which of the following set of lens
specifications would best simulate a lid attachment rigid lens fitting?
K's 42.00 @ .00 @ 90
Rx -2.00 -0.87 X 180
Upper lid positioned 2 mm below the superior limbus
Verified Answer -41.50 -1.50 9.5
which of the following bifocal designs represents a translating design?
Verified Answer -crescent design
What Rx would be ordered for a rigid gas permeable lens fit "on K"?
K's 43.00 @ .00 @ 90
Rx -3.00 +1.00 x 90
Verified Answer --2.00 D
,To aid in the positioning of a rigid prism ballast lens riding too low and
slipping underneath the lower lid, which of the following might be helpful?
Verified Answer -Truncation
The following rigid gas permeable diagnostic lens is placed on a patient's
eye: 43.50 -2.00 9.2
An over-reaction is performed with the following results: plano +1.50 x 95
Which of following lens parameters would you order for the patients?
Verified Answer -43.50 -0.50 -1.50 x 5 9.2
The following soft lens is placed on a patient's eye: 8.8 -4.00 14.0
An over-refraction is performed resulting in -0.75 D sphere. Which of the
following lens parameters would you order for the patient?
Verified Answer -8.8 -4.75 14.0
In an RGP lens, a poorly finished transitional zone between the optic zone
and the lens edge can be evaluated by:
Verified Answer -Profile analyzer
During the diagnostic evaluation of the following patient, the lens rotates 10
degrees to the right. Which of following lens parameters would you order for
the patient?
Patient's refraction -2.50 -1.00 x 170
, Diagnostic lens 8.7 -2.50 -1.00 x 170
Verified Answer -8.7 -2.50 -1.00 x 160
Which of the following lens designs would not provide a good visual result
for this patient?
K's 42.50 @ .00 @ 90
Rx -2.50 +1.50 x 90
Verified Answer -Soft spherical lens
Application of fluorescein should be used in which of the following
situations?
Verified Answer -Evaluation of a rigid gas permeable lens fit
If the diagnostic rigid gas permeable lens placed on the eye results in
minimal movement, which of the following will increase the movement on
the lens ordered for the patients?
Verified Answer -Decreasing overall lens diameter
If a soft contact lens decenters laterally, exposing a portion of the patient's
limbus, what change in parameter would improve this situation?
Verified Answer -increasing lens diameter
When evaluating a diagnostic soft lens a patient, you notice that movement
is sluggish after only a few minutes. Which of following changes would you
make to the lenses that are ordered for patient?
Verified Answer -Flatten base curve
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