Ncle Exam, Practice Exam And Study Guide Exams
Actual 2024 (Ncle Test Bank)
which two lens parameters determine the sagittal depth of the lens?
a. base curve, power
b. diameter, base curve
c. power, thickness
d. thickness, diameter
which of the following is experienced by most soft lens wearers?
a. poor vision
b. lens dryness
c. neovascularization
d. superficial punctate keratitis
thicker lenses perform better in all of the following categories EXCEPT:
a. lens dryness
b. handling
,c. oxygen permeability
d. visual acuity
which instrument is LEAST likely to be used for in-office
verification of soft lenses?
a . radiuscope
b. lensmeter
c. slit lamp
d. measuring magnifier
which of the following conditions is MOST suitable to soft lens wear?
a. marginal dry eye
b. intermittent wear
c. dusty environment
d. irregular corneal astigmatism
in the making of concentric style bifocals, the different power zones
(distance and near) may be ground on:
a. the front surface
b. the back surface
c. either surface
d. both surfaces
c. either surface
the addition of fluorine to the rigid lens ingredients increases:
a. durability
,b. permeability
c. optical quality
d. wettability
which of the following instruments would NOT be used to verify the lens
diameter in the office?
a. diameter gauge
b. radiuscope
c. measuring magnifier
d. projection magnifier
Mounting the lens blank in the lathe so that the face of the button is
perpendicular to the spindle is necessary to avoid:
a. heat build-up
b. unwanted prism
, c. cylinder power
d. warpage
when reading the radius of curvature of the back surface with the
radiuscope, the lens is floated on a drop of liquid to:
a. neutralize the reflection from the front surface
b. keep the front surface clean
c. level the lens
d. none of the above
during the lathing process for topic lenses, cylinder power is generated by:
a. using a cylindrical diamond cutting tool
b. blocking the lens off center
c. squeezing the lens in a crimping tool
d. truncating the lens
When the lens power is verified, placing the concave surface against the
lensmeter aperture will reveal power.
a. effective
b. front vertex
c. true
d. back vertex
Actual 2024 (Ncle Test Bank)
which two lens parameters determine the sagittal depth of the lens?
a. base curve, power
b. diameter, base curve
c. power, thickness
d. thickness, diameter
which of the following is experienced by most soft lens wearers?
a. poor vision
b. lens dryness
c. neovascularization
d. superficial punctate keratitis
thicker lenses perform better in all of the following categories EXCEPT:
a. lens dryness
b. handling
,c. oxygen permeability
d. visual acuity
which instrument is LEAST likely to be used for in-office
verification of soft lenses?
a . radiuscope
b. lensmeter
c. slit lamp
d. measuring magnifier
which of the following conditions is MOST suitable to soft lens wear?
a. marginal dry eye
b. intermittent wear
c. dusty environment
d. irregular corneal astigmatism
in the making of concentric style bifocals, the different power zones
(distance and near) may be ground on:
a. the front surface
b. the back surface
c. either surface
d. both surfaces
c. either surface
the addition of fluorine to the rigid lens ingredients increases:
a. durability
,b. permeability
c. optical quality
d. wettability
which of the following instruments would NOT be used to verify the lens
diameter in the office?
a. diameter gauge
b. radiuscope
c. measuring magnifier
d. projection magnifier
Mounting the lens blank in the lathe so that the face of the button is
perpendicular to the spindle is necessary to avoid:
a. heat build-up
b. unwanted prism
, c. cylinder power
d. warpage
when reading the radius of curvature of the back surface with the
radiuscope, the lens is floated on a drop of liquid to:
a. neutralize the reflection from the front surface
b. keep the front surface clean
c. level the lens
d. none of the above
during the lathing process for topic lenses, cylinder power is generated by:
a. using a cylindrical diamond cutting tool
b. blocking the lens off center
c. squeezing the lens in a crimping tool
d. truncating the lens
When the lens power is verified, placing the concave surface against the
lensmeter aperture will reveal power.
a. effective
b. front vertex
c. true
d. back vertex
