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NCLE REVIEW NAO updated already passed
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NCLE REVIEW NAO updated already passed
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NCLE REVIEW NAO updated alreadypassed
Biggest disadvantage of PMMA material is its lack of - correct answer ✔✔Gas permeability
Layer that makes up 10% of the cornea - correct answer ✔✔Epithelium
Vertical measurement for palpebral fissure - correct answer ✔✔15mm
Eyelid muscle responsible for lid closure - correct answer ✔✔Orbicularis oculi
A dense opacity of the cornea is called a: - correct answer ✔✔leukoma
Goblet cells that secrete that secrete mucous into tear film are located in which structure - correct
answer ✔✔Conjunctiva
Transition zone between the bulbar conjunctiva and the palpebral conjunctiva is called - correct answer
✔✔fornix
Middle layer of the globe is mostly responsible for - correct answer ✔✔Nutrition
Pupillary constriction is called - correct answer ✔✔miosis
Bactericidal ingredient found in the precorneal tear film is - correct answer ✔✔Lysozyme
The cornea is clear, and must remain clear, which means it must be ______, and be free from ______. -
correct answer ✔✔avascular, scarring
, what are tarsal plates? - correct answer ✔✔two thin, elongated plates of dense connective tissue, about
2.5cm in length. Contributes to it's form and support.
what is a prism ballast? - correct answer ✔✔prismatic shape used in contact lens to stabilize the lens by
preventing rotation
how does one achieve the rotational control of truncation? - correct answer ✔✔by making the bottom
edge of the lens flat
what are principal meridians? - correct answer ✔✔the meridians of most and least curvature, or
greatest and least power on a cylindrical or toric surface
what is a bicurve lens? - correct answer ✔✔lens consisting of two posterior curvatures; one central
curve(base curve) and one peripheral curve
a soft lens should have a curve and diameter that will allow it to drape the cornea, vault over the limbus,
and extend how many mm into the sclera? - correct answer ✔✔1mm
what angle identifies the smallest angle? - correct answer ✔✔minimum visual angle
if the diameter is kept constant and the base curve is changed, the sagittal depth of the lens changes.
How steep is the base curve, how large is the sag, and how steep is the fit? - correct answer ✔✔steeper
the base curve, the larger the sag and the steeper the fit
given the K's 42.00@180/42.50@90, a manifest Rx of -1.00-.50x180, and your patient wanting to wear
his lenses only on the weekends, which type of lens would you suggest? - correct answer ✔✔soft
spherical
describe the axial edge lift - correct answer ✔✔the vertical distance from the lens edge to an extension
of the base curve of a lens
what is apical bearing or apical touch - correct answer ✔✔posterior lens curvature resting on the corneal
apex
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