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NCLE Test Questions and Answers
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NCLE Test Questions and Answers
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NCLE Test Questions and Answers(NUMBER 22)
Given the following information:
K's 45.00 @ 180/42.00 @ 90
Rx -2.00 -4.25 x 90
Which of the following RGP lens designs would best correct this wearers vision?
a. 45.00 -2.00
b. 42.00 -2.00 -4.25 x 90 prism ballasted
c. 42.00 -2.00
d. 42.00/45.00 -2.00 - ANSWER-d. 42.00/45.00 -2.00
A _________ lens is a translating bifocal:
a. concentric
b. aspheric
c. deffractive
d. segmented - ANSWER-d. segmented
A ________auxiliary trial lens will extend the keratometer to 61.00 D.
a. -1.25
b. +1.25
c. -1.50
d. +1.50 - ANSWER-b. +1.25
A back toric soft lens works best with:
a. Residual astigmatism
b. High corneal toricity
c. Low corneal toricity
d. Spherical toricity - ANSWER-b. High corneal toricity
A bifocal lens in which the power changes from the central area of the lens to the
periphery is known as
a. an aspherical lens
b. a tangent streak lens
c. a monocentric lens
d. a crescent lens - ANSWER-a. an aspherical lens
A dense white appearance of the entire peripheral circumference of the cornea which
does not stain and is often seen in the elderly is known as:
a. neovascularization
,b. Dellen
c. Arcus senilus
d. Corneal ulcer - ANSWER-c. Arcus senilus
A good example of a bifocal contact lens which may rotate without vision imparement is:
a. aspheric
b. executive
c. fused crescent
d. tangent streak - ANSWER-d. tangent streak
a hardening of the crystalline lens causing loss of accommodation is known as:
a. presbyopia
b. myopia
c. hyperopia
d. aphakia - ANSWER-a. presbyopia
A high degree of with the rule astigmatism fitted with a rigid spherical lens will show
touch
a. on the horizontal meridian
b. on the vertical meridian
c. on the oblique meridian
d. on the residual meridian - ANSWER-a. on the horizontal meridian
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 low riding high plus on a 40.00/40.75 cornea could be corrected with
a. a myoflange
b. a hyperflange
c. a one cut
d. a panafocal - ANSWER-a. a myoflange
A non-wetting RGP lens may cause:
a. hazy, filmy vision
b. lens awareness
c. dryness or grittiness
d. all of the above - ANSWER-d. all of the above
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)
A normal tear break up time is
a. 6-7 seconds
b. 10-12 seconds
c. Less than 5 seconds
d. none of the above - ANSWER-b. 10-12 seconds
A rigid contact lens measures +15.00 BVP. The FVP will measure.
a. a lesser dioptric reading
b. a greater dioptric reading
c. an identical dioptric reading
d. an astigmatic reading - ANSWER-a. a lesser dioptric reading
A rigid lens showing a band-shaped area of touch on the flattest meridian is an
indication of
a. steep fit
b. an alignment fit
c. a flat fit
d. an astigmatic fit - ANSWER-a. steep fit
A rigid lens showing apical pooling is an indication of
a. steep fit
b. an alignment fit
c. a flat fit
d. an astigmatic fit - ANSWER-a. steep fit
A rigid lens showing apical vaulting is an indication of
a. steep fit
b. an alignment fit
c. a flat fit
d. an astigmatic fit - ANSWER-a. steep fit
A rigid lens showing no apical clearance is an indication of
a. a steep fit
b. an alignment fit
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