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NCLE Study Guide 1 Exam 2024/2025 Questions With Completed & Verified Solutions.
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NCLE Study Guide 1 Exam 2024/2025 Questions With Completed & Verified Solutions.
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NCLE Study Guide 1Which of the following medications may affect successful contact lens wear? - ANS
Antihistamines
(Because they dry out tear film)
Which term refers to a sensitivity to light? - ANS photophobia
The following is an example of what astigmatism?
Ks: 42.50 @ .50 @ 90 - ANS Against the Rule
(Because the K reading is steeper in the horizontal meridian)
The cornea receives nutrients from: 1) aqueous humor 2) tears 3) Limbal blood vessels
4) orbicularis occuli - ANS 1,2, & 3
*the orbicularis occuli is a muscle that is for lid closure*
The increases loss of ability of the crystalline lens to accommodate is called - ANS
Presbyopia
(Means gradual loss of accommodation)
Which instrument can provide simultaneous information about the cornea, lids,
conjunctiva, lashes, contact lens surface and fit? - ANS Slit lamp
The classic model of the precorneal tear film is composed of three layers. They are: -
ANS Lipid, aqueous, mucin
Transpose the following: -4.50+1.25*94 - ANS -3.25-1.25*004
The average pH of human tears is - ANS 7.4
If the manufacturer's guidelines suggest a minimum of 4 hours for disinfection what
would you suggest to the patient - ANS A minimum of 4 hours is required
, The main supply of oxygen to the corneal epithelium is derived from the - ANS Tear film
What is the term for the condition in which there is a loss of vision without any apparent
disease of the eye? - ANS Amblyopia
Which auxiliary trial lens will extend the keratometer range to approximately 30.00D? -
ANS -1.00
Which step should be performed first when taking keratometer measurements - ANS
Focus eye piece
The following is an example of which type of astigmatism?
Ks: 44 @ .50 @ 90
Rx: -3.00-2.50*180 - ANS Lenticular astigmatism
(Lenticular astigmatism is present when when there is significantly more astigmatism in
the pts refraction than corneal surface)
Ocular signs of aging include: 1) tear film abnormalities 2) reduced lid elasticity 3) lens
opacities 4) loss of accomodation - ANS All of the above
Transpose the following Rx: +1.50+1.00*075 - ANS +2.50-1.00*165
Precorneal tear film provides
1) smooth optical surface 2) metabolic nutrients to the epithelium 3) oxygen to the
endothelium 4) limbal hyperemia - ANS 1 & 2
(The tear film provides a smooth surface for the cornea. This is maintained by a blinking
mechanism providing metabolites, such as O2.)
The cornea has 5 layers, what's the order anterior to posterior? - ANS Epithelium,
bowmans, stroma, descemet's endothelium
The normal cornea is transparent due to the pump action creating proper fluid balance.
Which layer of the cornea is most responsible for maintaining this function? - ANS
Endothelium
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