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-cylin...
NCLE Test Questions & ANSWERS(RATED A)
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
d. high magnification and an angle between the beam and scope of 180˚ - ANSWER a. the naked eye and
an angle between the slit lamp beam and the eye of 90˚
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 - ANSWER d. with the rule astigmatism
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 - ANSWER b. 180
Which of the following could be considered in the fitting of a keratoconus patient
1. aspheric
2. McGuire
3. Soper
4. tangent streak
a. 1 & 2
b. 2 & 3
c. 3 & 4
d. 1, 2 and 3 - ANSWER d. 1, 2 and 3
Two designs helpful in orienting high riding myopic lenses are:
1. flattening the B.C. relationship
2. myo-flang
3. hyper-flang
4. prism ballast
a. 1 & 2
b. 1 & 3
c. 2 & 3
d. 3 & 4 - ANSWER d. 3 & 4
Age/related signs of presbyopia include:
1. tear film abnormalities
2. reduce lid elasticity
3. lens opacities
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Olivegrades. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
