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NCLE FINAL EXAM PREP 2024/500+ QUESTIONS AND CORRECT VERIIED ANSWERS LATEST UPDATE $17.99   Add to cart

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NCLE FINAL EXAM PREP 2024/500+ QUESTIONS AND CORRECT VERIIED ANSWERS LATEST UPDATE

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NCLE FINAL EXAM PREP 2024/500+ QUESTIONS AND CORRECT VERIIED ANSWERS LATEST UPDATE

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  • August 26, 2024
  • 125
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NCLE
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PurityKauri
NCLE FINAL EXAM PREP 2024/500+ QUESTIONS AND
CORRECT VERIIED ANSWERS LATEST UPDATE 2024-
2025

Optic zone -FEEDBACK:->>the central portion of a contact lens which contains the

refractive power and generally corresponds to the central corneal cap



Posterior apical radius -FEEDBACK:->>this term is generally used in reference to

spin-cast soft lenses. the curvature of the posterior surface of the lens changes with

the refractive power. the radius of curvature is measured at the apex of the posterior

surface.



steeper base curve -FEEDBACK:->>occurs when the posterior radius of curvature

is decreased (i.e. 8.4 to 8.1 mm)



flatter base curve -FEEDBACK:->>occurs when the posterior radius of curvature is

increased (i.e.8.1 to 8.4 mm)



bicurve lens -FEEDBACK:->>a contact lens which contains two curves: one base

curve and one secondary curve. it is usually small 7.5 to 8.8 mm on diameter,

relatively steep and made with narrow peripheral curves about 0.2 mm. lenses are

usually intrapalpebral lenses, designed to fit within the palpebral fissure limits.

,tricurve lens -FEEDBACK:->>a contact lens which contains three curves: a base

curve, an outer peripheral posterior curve (PPC), and an intermediate posterior curve

(IPC). lenses are generally larger, 9.5 mm or greater.



multicurve lens -FEEDBACK:->>contains a base curve and three or more

peripheral curves. usually a larger lens.



junctional zone -FEEDBACK:->>the junction of two curves



blending -FEEDBACK:->>the smoothing of a junctional zone by removing the

sharp line between the zones

lens diameter or chord diameter -Answer✅ the width of a lens or the measurement from one

edge of the lens to the opposite edge



curve widths -FEEDBACK:->>the width of the CPC, PPC, or IPC



central thickness -FEEDBACK:->>separation between the anterior and posterior

surface at the geometric center of the lens. minus lenses are thinner, plus lenses are

thicker



ballasted lens -FEEDBACK:->>lens with a heavier base which becomes oriented

inferiorly or downward when the lens is worn

,prism ballated lens -FEEDBACK:->>a ballasted lens which utilizes a prism wedge

designed to weight the lens



truncated lens -FEEDBACK:->>a lens which has been cut off, usually 0.5-1.5

mm along its lower edge, to form a horizontal base. double along the top and

bottom portion of the lens is sometimes done to help improve stabilization



back surface power -FEEDBACK:->>effective power of a lens when measured from

the back surface



wetting angle -FEEDBACK:->>the angle that the edge of a bead of water makes

with the surface of the plastic, the smaller the angle the greater the wetting ability



toric lenses or toroid lenses -FEEDBACK:->>lenses with different radii of curvature

in each meridian which are used to correct astigmatism



principal meridians -FEEDBACK:->>the meridians of shortest and longest radii

which differ by 90 degrees



front surface toric lens -FEEDBACK:->>a lens in which the anterior surface has

two different radii and the posterior surface is spherical

, back surface toric lens -Answer✅ a lens in which the posterior surface has two different radii

and the anterior surface is spherical



bitoric lens -FEEDBACK:->>a lens in which both the posterior and anterior surfaces

contain two different radii



lenticular bowl -FEEDBACK:->>a lens design generally used in higher plus power

which consists of a central optic zone and a surrounding non-optic peripheral or

"carrier" portion



spin-cast soft lens -FEEDBACK:->>a mentioned of manufacturing soft contact

lenses whereby a liquid material is revolved in a mold at a controlled speed and

temperature which produces the desired curvature, design, and power



acuity -FEEDBACK:->>clearness; visual is measured by the smallest object

that can be seen at a certain distance




adnexa oculi -FEEDBACK:->>accessory structures of the eye, such as the lacrimal

appatatus and the eyelids

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