NCLE Advanced NEW| QUESTIONS WITH COMPLETE ANSWERS
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Course
NCLE
Institution
Liberty University
the lens design of choice when there is little or no corneal astigmatism and a significant amount of refractive astigmatism.
a. front surface cylinder
b. back surface toric
c. bitoric lens
d. spherical gp Correct Answer: a. front surface cylinder
this design is indicated when the refract...
ncle advanced new| questions with complete answers
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NCLE Advanced NEW| QUESTIONS WITH COMPLETE ANSWERS
the lens design of choice when there is little or no corneal astigmatism and a
significant amount of refractive astigmatism.
a. front surface cylinder
b. back surface toric
c. bitoric lens
d. spherical gp Correct Answer: a. front surface cylinder
this design is indicated when the refractive astigmatism is approximately 40%
greater than the corneal astigmatism.
a. front surface cylinder
b. back surface toric
c. bitoric lens
d. spherical gp Correct Answer: b. back surface toric
it is utilized when there is significant amount of corneal astigmatism (2.00 diopters
or more.)
a. front surface cylinder
b. back surface toric
c. bitoric lens
d. spherical gp Correct Answer: c. bitoric lens
Why would you put toric peripheral curves on a bitoric lens?
a. to create an oval optical zone
b. to create a circular optical zone
c.to make it hard to modify
d. to make it more expensive Correct Answer: b. to create a circular optical zone
Keratometry readings of 43.00 @ 180/41.00 @ 90 are an example of
a. lenticular astigmatism
b. against the rule astigmatism
c. with the rule astigmatism
d. oblique astigmatism Correct Answer: b. against the rule astigmatism
,When verifying the specifications of a front surface cylinder lens it will read
a. spherical in the radiuscope, spherical in the lensometer
b. spherical in the radiuscope, toric in the lensometer
c. toric in the radiuscope, toric in the lensometer
d. toric in the radiuscope, spherical in the lensometer Correct Answer: b. spherical
in the radiuscope, toric in the lensometer
What's the main purpose of putting prism ballast in a front surface cylinder lens?
a. to make a high riding lens ride high
b. to keep the cylinder axis in proper orientation
c. to decrease lens mass
d. to make a low riding lens ride low Correct Answer: b. to keep the cylinder axis
in proper orientation
When verifying the specifications of a bitoric lens it will read
a. spherical in the radiuscope, spherical in the lensometer
b. spherical in the radiuscope, toric in the lensometer
c. toric in the radiuscope, toric in the lensometer
d. toric in the radiuscope, spherical in the lensometer Correct Answer: d. toric in
the radiuscope, spherical in the lensometer
In against the rule astigmatism
a. the horizontal meridian is flatter and the vertical meridian is steeper
b. the horizontal meridian is steeper and the vertical meridian is flat
c. the meridians are equal
d. the meridians are oblique and distorted Correct Answer: b. the horizontal
meridian is steeper and the vertical meridian is flat
When a spherical GP lens is fit on an against the rule astigmat, the lens will tend to
position where?
a. superior on the cornea
b. nasally on the cornea
c. temporally on the cornea
d. inferiorly on the cornea Correct Answer: b. nasally on the cornea
, Which layer of the cornea makes up 10% of the structures total thickness?
a. epithelium
b. bowman's membrane
c. endothelium
d. stroma Correct Answer: a. epithelium
The vertical measurement of the palpebral fissure for an average eye is
a. 5 mm
b. 10 mm
c. 15 mm
d. 20 mm Correct Answer: b. 10 mm
The eyelid muscle responsible for closure of the lids is the
a. dilator pupillae
b. orbicularis oculi
c. levator superioris
d. pectoral blephari Correct Answer: b. orbicularis oculi
A dense opacity of the cornea is called a
a. dendrite
b. nebula
c. fovea
d. leukoma Correct Answer: d. leukoma
The most common manifestation of keratoconjunctivitis sicca is
a. riley-day syndrome
b. sjogrens syndrome
c. aqueous tear deficiency
d. mucin deficiency Correct Answer: c. aqueous tear deficiency
Drugs that cause a reduction in blink rate include
a. antihistamines
b. muscle relaxants
c. anti-depressants
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