NCLE TEST EXAM QUESTIONS AND ANSWERS
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 ANSWER✅✅a. profile analyzer
Contact lens power should be specified in-
a. back vertex power
b. sphero-cylinder power
c. power in situ
d. posterier apical radius - CORRECT ANSWER✅✅a. back vertex power
The slit-lamp illumination that gives an overall view of the cornea but limits detail is-
a. sclerotic scatter
b. diffuse
c. specular reflection
d. oscilatory - CORRECT ANSWER✅✅b. diffuse
When a keratometric miers reflected off a soft contact lens are only clear when the wearer blinks, the
lens fit is too-
a. small
b. large
c. steep
d. flat - CORRECT ANSWER✅✅c. steep
Transient keratometric mier distortion is usually due to-
a. pre-ocular tear film abnormalities
,b. prolonged rigid lens wear
c. prolonged soft lens wear
d. irregular corneal astigmatism - CORRECT ANSWER✅✅a. pre-ocular tear film abnormalities
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
d. high magnification and an angle between the beam and scope of 180˚ - CORRECT ANSWER✅✅a. the
naked eye and an angle 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
d. with the rule astigmatism - CORRECT ANSWER✅✅d. with the rule astigmatism
Refractive Rx -3.00 -1.00 x 170
K's 42.00 @ 170/43.00 @ 80
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 clockwise. The lens ordered should have an axis
of:
a. 10
b. 180
c. 170
, d. 160 - CORRECT ANSWER✅✅b. 180
Given the same circumstances from the above question, once the correctly ordered lens has been
dispensed, the rotational marks should settle at _______.
a. 6 o clock
b. 10 clockwise rotation
c. 10 counter clockwise rotation
d. none of the above - CORRECT ANSWER✅✅b. 10 clockwise rotation
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 ANSWER✅✅a. measuring magnifier
(the book says d. radiuscope)
The instrument used for magnification of the edge of a rigid CL is a _______.
a. radiuscope
b. shadowgraph
c. profile analysis
d. keratometer - CORRECT ANSWER✅✅b. shadowgraph
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
b. +2.00
c. +2.50
d. +3.00 - CORRECT ANSWER✅✅c. +250
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 ANSWER✅✅a. profile analyzer
Contact lens power should be specified in-
a. back vertex power
b. sphero-cylinder power
c. power in situ
d. posterier apical radius - CORRECT ANSWER✅✅a. back vertex power
The slit-lamp illumination that gives an overall view of the cornea but limits detail is-
a. sclerotic scatter
b. diffuse
c. specular reflection
d. oscilatory - CORRECT ANSWER✅✅b. diffuse
When a keratometric miers reflected off a soft contact lens are only clear when the wearer blinks, the
lens fit is too-
a. small
b. large
c. steep
d. flat - CORRECT ANSWER✅✅c. steep
Transient keratometric mier distortion is usually due to-
a. pre-ocular tear film abnormalities
,b. prolonged rigid lens wear
c. prolonged soft lens wear
d. irregular corneal astigmatism - CORRECT ANSWER✅✅a. pre-ocular tear film abnormalities
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
d. high magnification and an angle between the beam and scope of 180˚ - CORRECT ANSWER✅✅a. the
naked eye and an angle 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
d. with the rule astigmatism - CORRECT ANSWER✅✅d. with the rule astigmatism
Refractive Rx -3.00 -1.00 x 170
K's 42.00 @ 170/43.00 @ 80
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 clockwise. The lens ordered should have an axis
of:
a. 10
b. 180
c. 170
, d. 160 - CORRECT ANSWER✅✅b. 180
Given the same circumstances from the above question, once the correctly ordered lens has been
dispensed, the rotational marks should settle at _______.
a. 6 o clock
b. 10 clockwise rotation
c. 10 counter clockwise rotation
d. none of the above - CORRECT ANSWER✅✅b. 10 clockwise rotation
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 ANSWER✅✅a. measuring magnifier
(the book says d. radiuscope)
The instrument used for magnification of the edge of a rigid CL is a _______.
a. radiuscope
b. shadowgraph
c. profile analysis
d. keratometer - CORRECT ANSWER✅✅b. shadowgraph
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
b. +2.00
c. +2.50
d. +3.00 - CORRECT ANSWER✅✅c. +250
