Exam (elaborations)
NCLE Test Review Questions And Answers With Verified Solutions (GRADED A+)
- Course
- Institution
NCLE Test Review Questions And Answers With Verified Solutions (GRADED A+)
[Show more]
Content preview
NCLE Test Review Questions AndAnswers With Verified Solutions
(GRADED A+)
Test that measures the quality of tears - ANSWER✔✔ B.U.T. Test (Break up time)
What is the O2 Permeability - ANSWER✔✔ DK values of a lens
What are the disadvantages of Soft Lenses? - ANSWER✔✔ Doesn't correct
irregular astigmatism, favors deposit formation
Which test measures the quantity of tears? - ANSWER✔✔ The Schirmer test.
What are good results for the Schirmer test? - ANSWER✔✔ 15 mm in 5 minutes.
What are dry eye results for the Schirmer test? - ANSWER✔✔ 5-10 mm in 5
minutes.
Neovascularization is mainly due to what? - ANSWER✔✔ Hypoxia, corneal edema,
tight contact lens fit
The Radii and Power of an average cornea - ANSWER✔✔ 7.85 mm or 43.00 D
What are the layers of the cornea? - ANSWER✔✔ Epithelium, Bowman's
membrane, Stroma, Descemet's membrane, Endothelium
,The main disadvantage of soft contact lenses - ANSWER✔✔ Protein deposits
What is it called when contact lenses are used to correct high myopia? -
ANSWER✔✔ Orthokeratology (Ortho-K)
A contact lens with diameter that is larger than the cornea is a hydrophobic or
hydrophilic lens? - ANSWER✔✔ Hydrophilic lens
Which of the following curves indicates the flattest base curve:7.50 mm, 37.50 D,
8.60 mm, 49.00 D? - ANSWER✔✔ 37.50 D
A CTL was ordered with a BC of 7.85 mm but was received from the lab with a BC
of 7.80 mm. The BC of the actual lens is _____. - ANSWER✔✔ .25 D steeper than
the ordered CTL.
A CTL with a BC of 7.42 mm is fitting too, a tighter fit may be achieved by
changing the base curve to: 7.46 , 7.85 mm, 8.04 mm, none of these? -
ANSWER✔✔ none of these... S.S.S. rule
A CTL has a BC of 7.50 mm, what would the PPC most likely be? 7.45 mm, 42.50 D,
7.35 mm, 30.00 D - ANSWER✔✔ 30.00 D= 11.25 mm/S.S.S. Rule
What does the term haptic Lens refer to? - ANSWER✔✔ A scleral CTL size
The secondary curve of a RGP CTL is generally flatter or steeper than the CPC and
by how much? - ANSWER✔✔ flatter by 2-4 diopters
, When the power of a curve changes by 0.50 D, the radius of curvature changes by
approximately how much? - ANSWER✔✔ 0.10 mm
When the CPC of a CTL measures 7.5 mm radius, how much is the power in
diopters? - ANSWER✔✔ 45.00 D
A soft CTL demonstrates excessive movement. This can be fixed with a lens that
has a _________ diameter. - ANSWER✔✔ Larger Diameter. (larger diameter-
steeper fit=tighter fit)
HEMA is an abbreviation commonly used to describe what lens? - ANSWER✔✔
The chemicalname for soft CTL
What is the main reason to utilize a ballasted CTL? - ANSWER✔✔ To have less
rotation of the CTL (Usually used in bifocal CTL's).
The Central portion of the back surface of the CTL is called _________. -
ANSWER✔✔ CPC (Central posterior curve) or the Base Curve (BC) or the optic
zone.
The distance between a flat surface and the back surface of the central portion of
the lens is called the ____________. - ANSWER✔✔ Sagital depth (vault, height)
A loose fitting CTL can be made to fit tighter by ____________ the radius of the
CPC. - ANSWER✔✔ shortening the radius of the CPC. S.S.S. Rule
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 classhub. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78252 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now