NCLE TEST QUESTIONS
AND ANSWERS ALL
CORRECT
The FDA has recommended that extended wear contact lenses be worn for a maximum
of:
a. 7 days
b. 14 days
c. 30 days
d. 45 days - Answer- a. 7 days
The CPC of a rigid lens was ordered 7.84mm and was received measuring 7.94mm.
This lens is _____ than ordered.
a. 0.50D steeper
b. 1.00D flatter
c. 0.50 flatter
d. 1.00D steeper - Answer- c. 0.50 flatter
When comparing high DK silicone acrylate polymers to earlier generation materials of
the same type, the new "improved" silicone acrylates
1 increase oxygen permeability
2 flex less
3 have poorer wetting characteristics
4 scratch less
a. 1 only
b. 1 and 3
c. 2 and 4
d. all are correct - Answer- b. 1 and 3
A normal fitting soft contact lens will have:
a. three point touch (apex and periphery)
b. apical clearance
,c. edge stand-off
d. none of the above - Answer- a. three point touch (apex and periphery)
Therapeutic soft lenses should be fit with minimal movement in which case?
a. Keratitis sicca
b. Trichiasis
c. Recurrent erosion
d. Keratoconus - Answer- c. Recurrent erosion
An aphakic patient with K readings of 40.50 @ 180/41.25 @ 90, large palpebral fissures
and flaccid lower lids is a good candidate for
a. a one cut
b. a myoflange lenticular
c. a hyperflange lenticular
d. a back toric - Answer- b. a myoflange lenticular
When evaluating fluorescein patterns, a special filter must be used with __________.
a. Silicone acrylate
b. Polymethylmethacrylate
c. Fluropolymers
d. Hydroxyethyl methacrylate - Answer- c. Fluropolymers
The keratometer is an instrument used to measure
a. Corneal curvature
b. Lens power
c. Lens diameter
d. Lens thickness - Answer- a. Corneal curvature
A lens fitted for keratoconus should:
a. Flatten the apex
b. Ride high
c. Align the apex
d. Ride low - Answer- c. Align the apex
A soft contact lens which is too loose can show all the following EXCEPT:
a. edge stand-off
b. limbal compression
c. a bubble under the lens edge
d. clear retinoscopy directly after blinking - Answer- b. limbal compression
, Correction of a high riding rigid minus lens is accomplished by using a
a. Flatter lens
b. Larger lens
c. Minus carrier lenticular lens
d. Prism lens - Answer- d. Prism lens
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 - 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 - 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 - 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 - 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 - 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
AND ANSWERS ALL
CORRECT
The FDA has recommended that extended wear contact lenses be worn for a maximum
of:
a. 7 days
b. 14 days
c. 30 days
d. 45 days - Answer- a. 7 days
The CPC of a rigid lens was ordered 7.84mm and was received measuring 7.94mm.
This lens is _____ than ordered.
a. 0.50D steeper
b. 1.00D flatter
c. 0.50 flatter
d. 1.00D steeper - Answer- c. 0.50 flatter
When comparing high DK silicone acrylate polymers to earlier generation materials of
the same type, the new "improved" silicone acrylates
1 increase oxygen permeability
2 flex less
3 have poorer wetting characteristics
4 scratch less
a. 1 only
b. 1 and 3
c. 2 and 4
d. all are correct - Answer- b. 1 and 3
A normal fitting soft contact lens will have:
a. three point touch (apex and periphery)
b. apical clearance
,c. edge stand-off
d. none of the above - Answer- a. three point touch (apex and periphery)
Therapeutic soft lenses should be fit with minimal movement in which case?
a. Keratitis sicca
b. Trichiasis
c. Recurrent erosion
d. Keratoconus - Answer- c. Recurrent erosion
An aphakic patient with K readings of 40.50 @ 180/41.25 @ 90, large palpebral fissures
and flaccid lower lids is a good candidate for
a. a one cut
b. a myoflange lenticular
c. a hyperflange lenticular
d. a back toric - Answer- b. a myoflange lenticular
When evaluating fluorescein patterns, a special filter must be used with __________.
a. Silicone acrylate
b. Polymethylmethacrylate
c. Fluropolymers
d. Hydroxyethyl methacrylate - Answer- c. Fluropolymers
The keratometer is an instrument used to measure
a. Corneal curvature
b. Lens power
c. Lens diameter
d. Lens thickness - Answer- a. Corneal curvature
A lens fitted for keratoconus should:
a. Flatten the apex
b. Ride high
c. Align the apex
d. Ride low - Answer- c. Align the apex
A soft contact lens which is too loose can show all the following EXCEPT:
a. edge stand-off
b. limbal compression
c. a bubble under the lens edge
d. clear retinoscopy directly after blinking - Answer- b. limbal compression
, Correction of a high riding rigid minus lens is accomplished by using a
a. Flatter lens
b. Larger lens
c. Minus carrier lenticular lens
d. Prism lens - Answer- d. Prism lens
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 - 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 - 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 - 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 - 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 - 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
