1. Assessment of the quality ofthe peripheral curves(blends of a rigid contact lens) is achieved by the use of thea. profile analyzer
b. shadow graph
c. keratometer
d. burton light: a. profile analyzer
2. Contact lens power should be specified ina. back vertex power
b. sphero-cylinder power
c...
NCLE TEST QUESTIONS
AND VERIFIED
SOLUTIONS BY EXPERTS
2024/2025 GRADED A+.
,1. 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: a. profile analyzer
2. Contact lens power should be specified in-
a. back vertex power
b. sphero-cylinder power
c. power in situ
d. posterier apical radius: a. back vertex power
3. 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: b. diffuse
4. 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: c. steep
5. 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: a. pre-ocular tear film abnormalities
6. 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 90Ú
b. the blue cobalt filter of the slit lamp and an angle of about 45Ú
c. the green filter of the slit lamp with high magnification
d. high magnification and an angle between the beam and scope of 180:Úa. the naked eye and an angle between the slit
lamp beam and the eye of 90Ú
7. 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: d. with the rule astigmatism
8. 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: b. 180
9. Given the same circumstances from the above question, once the correct- ly 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: b. 10 clockwise rotation
10. 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: a. measuring magnifier (the book says d.
radiuscope)
11. The instrument used for magnification of the edge of a rigid CL is a
.
, a. radiuscope
b. shadowgraph
c. profile analysis
d. keratometer: b. shadowgraph
12. 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?
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