NCLE Test Questions with correct answers
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Assessment of the quality of the peripheral curves (blends of a
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rigid contact lens) is achieved by the use of the-
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a. profile analyzer
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b. shadow graph
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c. keratometer
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d. burton light - CORRECT ANSWERS ✔✔a. profile analyzer
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Contact lens power should be specified in-
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a. back vertex power
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b. sphero-cylinder power
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c. power in situ
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d. posterier apical radius - CORRECT ANSWERS ✔✔a. back vertex
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power
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The slit-lamp illumination that gives an overall view of the cornea
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but limits detail is-
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a. sclerotic scatter
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b. diffuse
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c. specular reflection
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d. oscilatory - CORRECT ANSWERS ✔✔b. diffuse
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,When a keratometric miers reflected off a soft contact lens are
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only clear when the wearer blinks, the lens fit is too-
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a. small
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b. large
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c. steep
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d. flat - CORRECT ANSWERS ✔✔c. steep
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Transient keratometric mier distortion is usually due to-
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a. pre-ocular tear film abnormalities
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b. prolonged rigid lens wear
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c. prolonged soft lens wear
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d. irregular corneal astigmatism - CORRECT ANSWERS ✔✔a. pre-
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ocular tear film abnormalities
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Epithelial edema which manifests itself clinically as central
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corneal haze, is verified by the slit lamp using sclerotic scatter
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illumination. What specific technique does the examiner use to
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see this condition?
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a. the naked eye and an angle between the slit lamp beam and
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the eye of 90˚
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b. the blue cobalt filter of the slit lamp and an angle of about 45˚
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c. the green filter of the slit lamp with high magnification
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d. high magnification and an angle between the beam and scope
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of 180˚ - CORRECT ANSWERS ✔✔a. the naked eye and an angle
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between the slit lamp beam and the eye of 90˚
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,With a rigid contact lens in place a flourescein pattern shows a
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narrow bend horizontally wih a concentration of flourescein
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inferiorly and superiorly under the lens. Which one of the
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following type of astigmatism is represented by this pattern?
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a. lenticular astigmatism
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b. residual astigmatism
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c. against the rule astigmatism
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d. with the rule astigmatism - CORRECT ANSWERS ✔✔d. with the
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rule astigmatism
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Refractive Rx -3.00 -1.00 x 170 |/ |/ |/ |/ |/
K's 42.00 @ 170/43.00 @ 80
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Given the above Rx and K's he following diagnostic toric soft lens
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was used:
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B.C. 8.8 |/
Power -3.00 -1.00 x 180 |/ |/ |/ |/
During dianostic evalutation, the above lens rotated 10
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clockwise. The lens ordered should have an axis of:
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a. 10|/
b. 180
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c. 170
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d. 160 - CORRECT ANSWERS ✔✔b. 180
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Given the same circumstances from the above question, once the
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correctly ordered lens has been dispensed, the rotational marks
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should settle at _______.
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a. 6 o clock
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, b. 10 clockwise rotation
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c. 10 counter clockwise rotation
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d. none of the above - CORRECT ANSWERS ✔✔b. 10 clockwise
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rotation
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An instrument that allows simultaneous verification of lens
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diameter, optic zone width, and peripheral curve width is:
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a. measuring magnifier
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b. ophthalmometer
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c. profile analyzer
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d. radiuscope - CORRECT ANSWERS ✔✔a. measuring magnifier
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(the book says d. radiuscope)
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The instrument used for magnification of the edge of a rigid CL is
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a _______.
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a. radiuscope
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b. shadowgraph
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c. profile analysis
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d. keratometer - CORRECT ANSWERS ✔✔b. shadowgraph
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Mary is wearing in her right eye RGP lens with a base curve of
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43.50 and a power of +2.75. The doctor refracts -0.75 sphere
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over this lens. If you wish to order her a new lens with a curve of
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43.00, what will the new power be?
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a. +1.50
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b. +2.00
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Assessment of the quality of the peripheral curves (blends of a
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
rigid contact lens) is achieved by the use of the-
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
a. profile analyzer
|/ |/
b. shadow graph
|/ |/
c. keratometer
|/
d. burton light - CORRECT ANSWERS ✔✔a. profile analyzer
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Contact lens power should be specified in-
|/ |/ |/ |/ |/ |/
a. back vertex power
|/ |/ |/
b. sphero-cylinder power
|/ |/
c. power in situ
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d. posterier apical radius - CORRECT ANSWERS ✔✔a. back vertex
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power
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The slit-lamp illumination that gives an overall view of the cornea
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
but limits detail is-
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a. sclerotic scatter
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b. diffuse
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c. specular reflection
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d. oscilatory - CORRECT ANSWERS ✔✔b. diffuse
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,When a keratometric miers reflected off a soft contact lens are
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only clear when the wearer blinks, the lens fit is too-
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a. small
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b. large
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c. steep
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d. flat - CORRECT ANSWERS ✔✔c. steep
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Transient keratometric mier distortion is usually due to-
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a. pre-ocular tear film abnormalities
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b. prolonged rigid lens wear
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c. prolonged soft lens wear
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d. irregular corneal astigmatism - CORRECT ANSWERS ✔✔a. pre-
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ocular tear film abnormalities
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Epithelial edema which manifests itself clinically as central
|/ |/ |/ |/ |/ |/ |/
corneal haze, is verified by the slit lamp using sclerotic scatter
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
illumination. What specific technique does the examiner use to
|/ |/ |/ |/ |/ |/ |/ |/ |/
see this condition?
|/ |/ |/
a. the naked eye and an angle between the slit lamp beam and
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
the eye of 90˚
|/ |/ |/ |/
b. the blue cobalt filter of the slit lamp and an angle of about 45˚
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
c. the green filter of the slit lamp with high magnification
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d. high magnification and an angle between the beam and scope
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of 180˚ - CORRECT ANSWERS ✔✔a. the naked eye and an angle
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between the slit lamp beam and the eye of 90˚
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
,With a rigid contact lens in place a flourescein pattern shows a
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
narrow bend horizontally wih a concentration of flourescein
|/ |/ |/ |/ |/ |/ |/ |/
inferiorly and superiorly under the lens. Which one of the
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
following type of astigmatism is represented by this pattern?
|/ |/ |/ |/ |/ |/ |/ |/ |/
a. lenticular astigmatism
|/ |/
b. residual astigmatism
|/ |/
c. against the rule astigmatism
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d. with the rule astigmatism - CORRECT ANSWERS ✔✔d. with the
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rule astigmatism
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Refractive Rx -3.00 -1.00 x 170 |/ |/ |/ |/ |/
K's 42.00 @ 170/43.00 @ 80
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Given the above Rx and K's he following diagnostic toric soft lens
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
was used:
|/ |/
B.C. 8.8 |/
Power -3.00 -1.00 x 180 |/ |/ |/ |/
During dianostic evalutation, the above lens rotated 10
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clockwise. The lens ordered should have an axis of:
|/ |/ |/ |/ |/ |/ |/ |/ |/
a. 10|/
b. 180
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c. 170
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d. 160 - CORRECT ANSWERS ✔✔b. 180
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Given the same circumstances from the above question, once the
|/ |/ |/ |/ |/ |/ |/ |/ |/
correctly ordered lens has been dispensed, the rotational marks
|/ |/ |/ |/ |/ |/ |/ |/ |/
should settle at _______.
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a. 6 o clock
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, b. 10 clockwise rotation
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c. 10 counter clockwise rotation
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d. none of the above - CORRECT ANSWERS ✔✔b. 10 clockwise
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rotation
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An instrument that allows simultaneous verification of lens
|/ |/ |/ |/ |/ |/ |/
diameter, optic zone width, and peripheral curve width is:
|/ |/ |/ |/ |/ |/ |/ |/ |/
a. measuring magnifier
|/ |/
b. ophthalmometer
|/
c. profile analyzer
|/ |/
d. radiuscope - CORRECT ANSWERS ✔✔a. measuring magnifier
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(the book says d. radiuscope)
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The instrument used for magnification of the edge of a rigid CL is
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
a _______.
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a. radiuscope
|/
b. shadowgraph
|/
c. profile analysis
|/ |/
d. keratometer - CORRECT ANSWERS ✔✔b. shadowgraph
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Mary is wearing in her right eye RGP lens with a base curve of
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
43.50 and a power of +2.75. The doctor refracts -0.75 sphere
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
over this lens. If you wish to order her a new lens with a curve of
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
43.00, what will the new power be?
|/ |/ |/ |/ |/ |/ |/
a. +1.50
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b. +2.00
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