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NCLE Practice Exam Questions And Answers
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A refractive error that prevents the light rays from coming to a single focus on the retina because of different degrees of refraction in the various meridians of the eye. ~ Astigmatism Condition in which the steepest corneal meridian is in the horizontal plane. 0-30 degrees or 150-180 deg...

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  • August 8, 2024
  • 33
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ncle practice exam questions and answers

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  • NCLE
  • NCLE

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NCLE Practice Exam Questions
And Answers

The advantages aphakia have over spectacle lenses


✓~ Less peripheral aberration

Less magnification


Increase visual field




not having a lens inside your eye


✓~ Aphakia




Which of the following can aphakia cause, myopia or hypermetropia?


✓~ Hypermetropia




Causes of aphakia


✓~ *Congenital absence of lens

*Surgical Aphakia


*Absorption of lens matter

,*Traumatic extrusion (push or forced out)


*Posterior dislocation- in vitreous, causes optical aphakia




The cornea thins and bulges outward into a cone shape


✓~ Keratoconus




Symptoms of Keratoconus


✓~ *distorted, blurred, double vision

*inability to see dim light


*sensitivity to light




Signs of keratoconus


✓~ CORNEAL THINNING AT THE APEX

CHANGES OF ASTIGMATISM


DECREASING VISION IN ONE EYE




cause of keratoconus

, ✓~ Cause is unknown, but it is believed to be present at birth or the loss of

collagen in the cornea




How can be keratoconus be treated?


✓~ *Surgical treatment

*Vision correction


*specialty contact


*Corneal cross link




Slows down and stop the progression of keratoconus but doesn't improve vision


✓~ Cornea Cross Linking




A conical shaped cornea can best be fit with contact lenses through the use of:


A.trial lenses


B. keratometer readings


C. eye impressions


D. topogometer readings


✓~ A. Trial lenses

, Prism ballast lenses can be useful for:


✓~ For cylindrical lenses and some bifocals

Helping to reduce lens rotation




What type of contacts needs prism ballast?


✓~ Front surface toric GP and bifocal/multifocal GP




What type of contacts does not need prism ballast


✓~ Back surface toric, Bitoric, and Spherical lenses




Base down prism from 0.75-1.5 diopters weighs the lens down and keeps it

stable so it doesn't rotate


✓~ Prism ballast




Bitoric lenses are prescribed:


A. Only when there is a small amount of corneal


B. Astigmatism and no residual when there 1s no corneal


C. Astigmatism only for bifocal contact lenses

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