NCLE TEST QUESTIONS AND ANSWERS
A+ GRADED WITH ACCURATE
SOLUTIONS
A soft lens has edge lift when observed on a cornea. How can this be
corrected?
a. Steepen base curve
b. Decrease diameter
c. Flatten base curve
d. Change edge design
Verified Answer -a. Steepen base curve
A back toric soft lens works best with:
a. Residual astigmatism
b. High corneal toricity
c. Low corneal toricity
d. Spherical toricity
Verified Answer -b. High corneal toricity
Corneal edema is observed inferiorly under a prism ballast toric soft lens.
What is the probable cause?
a. Lens is too tight
,b. Oxygen demand for this cornea is too great
c. Lens is too loose
d. Prism thickness
Verified Answer -d. Prism thickness
In evaluating a soft lens fit with either keratometry mires or retinoscopic
reflex, you detect distortion immediately after the blink. This is caused
by:
a. A steep fitting lens
b. A properly fitting lens
c. A flat fitting lens
d. A tight fitting lens
Verified Answer -c. A flat fitting lens
A non-wetting RGP lens may cause:
a. hazy, filmy vision
b. lens awareness
c. dryness or grittiness
d. all of the above
Verified Answer -d. all of the above
Causes of lens flexure may include:
1 pressure exerted by the upper lid
2 lens material
,3 apical clearance lens design
4 against the rule corneal toricity
a. 1 and 3
b. 2 and 4
c. 2 only
d. all of the above
Verified Answer -d. all of the above
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
Verified Answer -a. 7 days
Therapeutic soft lenses should be fit with minimal movement in which
case?
a. Keratitis sicca
b. Trichiasis
c. Recurrent erosion
d. Keratoconus
Verified 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
Verified Answer -b. a myoflange lenticular
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
Verified Answer -c. 0.50 flatter
When evaluating fluorescein patterns, a special filter must be used with
__________.
a. Silicone acrylate
b. Polymethylmethacrylate
c. Fluropolymers
A+ GRADED WITH ACCURATE
SOLUTIONS
A soft lens has edge lift when observed on a cornea. How can this be
corrected?
a. Steepen base curve
b. Decrease diameter
c. Flatten base curve
d. Change edge design
Verified Answer -a. Steepen base curve
A back toric soft lens works best with:
a. Residual astigmatism
b. High corneal toricity
c. Low corneal toricity
d. Spherical toricity
Verified Answer -b. High corneal toricity
Corneal edema is observed inferiorly under a prism ballast toric soft lens.
What is the probable cause?
a. Lens is too tight
,b. Oxygen demand for this cornea is too great
c. Lens is too loose
d. Prism thickness
Verified Answer -d. Prism thickness
In evaluating a soft lens fit with either keratometry mires or retinoscopic
reflex, you detect distortion immediately after the blink. This is caused
by:
a. A steep fitting lens
b. A properly fitting lens
c. A flat fitting lens
d. A tight fitting lens
Verified Answer -c. A flat fitting lens
A non-wetting RGP lens may cause:
a. hazy, filmy vision
b. lens awareness
c. dryness or grittiness
d. all of the above
Verified Answer -d. all of the above
Causes of lens flexure may include:
1 pressure exerted by the upper lid
2 lens material
,3 apical clearance lens design
4 against the rule corneal toricity
a. 1 and 3
b. 2 and 4
c. 2 only
d. all of the above
Verified Answer -d. all of the above
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
Verified Answer -a. 7 days
Therapeutic soft lenses should be fit with minimal movement in which
case?
a. Keratitis sicca
b. Trichiasis
c. Recurrent erosion
d. Keratoconus
Verified 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
Verified Answer -b. a myoflange lenticular
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
Verified Answer -c. 0.50 flatter
When evaluating fluorescein patterns, a special filter must be used with
__________.
a. Silicone acrylate
b. Polymethylmethacrylate
c. Fluropolymers
