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ABO NCLE EXAM QUESTIONS AND CORRECT ANSWERS VERIFIED BY EXPERTS|ACCURATE ACTUAL EXAM WITH FREQUENTLY TESTED QUESTIONS AND RATIONALE|GUARANTEED PASS| ALREADY GRADED A| LATEST UPDATE 2024|2025.$23.49
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ABO NCLE EXAM QUESTIONS AND CORRECT ANSWERS VERIFIED BY EXPERTS|ACCURATE ACTUAL EXAM WITH FREQUENTLY TESTED QUESTIONS AND RATIONALE|GUARANTEED PASS| ALREADY GRADED A| LATEST UPDATE 2024|2025.
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Course
ABO NCLE
Institution
ABO NCLE
ABO NCLE EXAM QUESTIONS AND CORRECT ANSWERS
VERIFIED BY EXPERTS|ACCURATE ACTUAL EXAM WITH
FREQUENTLY TESTED QUESTIONS AND
RATIONALE|GUARANTEED PASS| ALREADY GRADED A|
LATEST UPDATE 2024|2025.
ABO NCLE EXAM QUESTIONS AND CORRECT ANSWERS
VERIFIED BY EXPERTS|ACCURATE ACTUAL EXAM WITH
FREQUENTLY TESTED QUESTIONS AND
RATIONALE|GUARANTEED PASS| ALREADY GRADED A|
LATEST UPDATE 2024|2025.
a rigid lens showing a band-shaped area of touch on the flattest meridian is an indication of: -
CORRECT ANSWER An astigmatic fit
a rigid lens showing central vaulting is indicative of: - CORRECT ANSWER Apical clearance
fit
contact lenses that have a non-spherical back surface are called: - CORRECT ANSWER
Aspheric lenses
A rigid lens showing excessive apical pooling is an indication of: - CORRECT ANSWER a
steep fit
A rigid lens showing apical touch is an indication of: - CORRECT ANSWER A flat fit
A patient with a high degree of a with-the-rule astigmatism fitted with a spherical rigid gas
permeable lens will show touch: - CORRECT ANSWER on the horizontal meridian
A soft contact lens that is too loose may show all of the following:? - CORRECT ANSWER
edge stand off, excessive lens movement, distorted retinoscopy directly after blinking
Among the following choices, which is the latest lens design for keratoconus? - CORRECT
ANSWER Rose k design
Which of the following could cause a patient's rigid contact lens to displace frequently and pop
out without cause?
1.) Excessive posterior peripheral curve
2.) Insufficient peripheral curve
3.) Steep base curve relationship
4.) Flat base curve relationship - CORRECT ANSWER 1 and 4 excessive posterior peripheral
curve and flat base curve relationship
A normal fitting standard thickness soft contact lens will exhibit - CORRECT ANSWER three
point touch (apex and periphery)
When evaluating fluorescein patterns, a special filter must be used with: - CORRECT
ANSWER Polymers with a UV blocker
Causes of lens flexure may include: - CORRECT ANSWER Pressure exerted by the upper lid
high dk lens material
,apical clearance lens design
against the rule corneal toricity
A non-wetting rigid gas permeable lens may cause: - CORRECT ANSWER hazy/filmy vision,
Lens awareness, Dryness or grittiness
Which type of slit lamp illumination is used for observing tear break up time - CORRECT
ANSWER Diffuse illumination
Which of the following statements is correct?
A. extended wear soft lenses are extremely fragile and therefore a poor choice for patients
wishing to wear lenses on a daily basis
B. FDA Group IV lenses have a negatively charged surface that attracts positively charged tear
film, proteins, and lipids
C. Silicone acrylate RGP lenses contain a teflon -like substance that gives their surfaces non-
stick qualities
D. Adding greater amounts of silicone to RGP materials increase both their oxygen transmission
and base curve stability - CORRECT ANSWER B. FDA Group IV lenses have a negatively
charged surface that attracts positively charged tear film, proteins, and lipids
In evaluating soft lens with either keratometry mires or retinoscopic reflex, you detect distortion
immediately after the blink followed by clear mines. This caused by: - CORRECT ANSWER A
flat fitting lens
A soft lens has edge lift when observed on cornea. How can this be corrected? - CORRECT
ANSWER Steepen the base curve
Corneal edema is observed inferiorly under a prism ballast toric soft lens what is the probable
cause? - CORRECT ANSWER Prism thickness is too great
Which type of slit lamp illumination will allow you to determine corneal thickening, thinning
and distortion and depth of foreign bodies or opacities in the cornea? - CORRECT ANSWER
Optic section
which of the following is not important to document in medical records for contact lens patients?
- CORRECT ANSWER location at which the patient was originally taught insertion and
removal
which of the following will not increase the movement of a tight fitting rigid gas permeable lens?
- CORRECT ANSWER enlarge the posterior optic zone
,After building up her wearing time, Jennifer returned for an afternoon recheck after eight hours
of lens wear. The lenses moved <0.5 mm and her complaints were minimal except for late
afternoon burning. Which would you suspect? - CORRECT ANSWER tight lens
To correct a flat fitting rigid gas permeable lens you should: - CORRECT ANSWER Enlarge
the optical zone
IN order to create a smooth blend between the intermediate and peripheral curve of the following
contact, which radius tool should be used?
CPC 7.50 mm (45.00 D) IPC 8.50 mm PPC 10.50 mm - CORRECT ANSWER 9.5
which of the following polishing compounds should not be used with gas permeable lenses -
CORRECT ANSWER Silvo
To increase tear exchange with a rigid gas permeable lens what should be attempted? -
CORRECT ANSWER Reduce the overall lens diameter, Flatten the peripheral curves, and
decrease the optic zone
With a rigid contact lens in place, a fluorescein pattern shows a concentration of fluorescein
inferiorly and superiorly beneath the lens. Which one of the following types of astigmatism is
represented by this pattern? - CORRECT ANSWER With-the-rule astigmatism
Mary is swearing rigid gas permeable lens with a base curve of 43.50 D and a power +2.75 D.
She requires a -0.75 D sphere over this lens. If you wish to order her a new lens a curve of 43.00
D, what will the new power be? - CORRECT ANSWER +2.50 D
FDA Group 1 soft lenses - CORRECT ANSWER have a water content lower than 50% and a
non-ionic surface
Which of the following modifications to a rigid gas permeable lens can not be made in the office
- CORRECT ANSWER changing the base curve
In-office polishing of the anterior surface of rigid gas permeable lens surface of a rigid gas
permeable lens surface will provide many benefits to the patient. Which of the following is not a
benefit of polishing the lens in the office - CORRECT ANSWER Thinner lens edge
What is the most important feature of an in-office modification unit? - CORRECT ANSWER
variable speed motor
which of the following is not characteristics of corneal edema? - CORRECT ANSWER
peripheral flare
, which of the following is not used when blending peripheral curves in the office? - CORRECT
ANSWER slot gauge
the slit lamp illumination that gives an overall view of the cornea but limits detail is: -
CORRECT ANSWER diffuse
when keratometric mires reflected off a soft contact lens are only clear when the wearer blinks,
the lens fit is too - CORRECT ANSWER steep
Which of the following statements concerning lens movement is NOT correct:
A. A tight lens may cause blanching of the limbal vessels
B. A tight lens may cause scleral indentation
C. A loose lens may cause blurred vision immediately following the blink
D. A loose lens will be considerably more comfortable than a tight lens - CORRECT ANSWER
D. A loose lens will be considerably more comfortable than a tight lens
Use of Wratten #12 or Tiffen yellow filter is important in evaluating the fluorescein pattern of
patients with RGP lenses because: - CORRECT ANSWER Many patients are wearing lenses
containing UV inhibitors that block fluorescein
If fluorescein evaluation reveals apical staining, it could be due to: - CORRECT ANSWER a
lens that is too flat and loose, a lens that is too steep and tight, corneal edema
Newly fitted extended wear patients should have their first recheck in: - CORRECT ANSWER
24 hours
If an adapted contact lens wearer complaints of a sudden onset of discomfort, the technical
should suspect: - CORRECT ANSWER a damaged contact lens
If an RGP lens fails to provide acceptable visual acuity, the fitter should first: - CORRECT
ANSWER have a sphero-cylindrical over-refraction performed to see if the reduced acuity is due
to residual astigmatism
According to the FDA, disposable contact lenses that are removed nightly, should be discarded
after: - CORRECT ANSWER 2 weeks
Three and nine o'clock staining in RGP lens wears can best be eliminated by: - CORRECT
ANSWER Reducing center and edge thickness and teaching the patient to blink completely
Circumcorneal injection in a soft lens wearer may be sign of: - CORRECT ANSWER Tight lens
syndrome, solution sensitivity, keratitis
A technical can perform a preliminary evaluation of soft contact lens movement by:
A. Observing the movement of the lens edge in relation to the position of a conjunctival vessel
B. Having the patient look up and blink
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