ABO practice exam ophlthalmic optics,
Exam Questions And Correct Answers.
. Columbia Resin-39.
. Lenses that commonly referred to as plastic are made of a material called
___________ a. Zylonite. b. Columbia Resin-39. c. Hivex. d. Polycarbonate.
Runs perpendicular to
The "normal" is an imaginary line that ________________ the lens surface. a. Refracts
through b. Runs parallel to c. Runs perpendicular to d. Reflects off of
.Simple hyperopic astigmatism
. +3.00 -3.00 x 180 is an indication of a _______________ a. Simple myopic
astigmatism. b. Mixed astigmatism. c. Compound hyperopic astigmatism. d. Simple
hyperopic astigmatism.
Emmetropia.
A patient that presents with a plano prescription is diagnosed with ____________ a.
Astigmatism. b. Hyperopia. c. Emmetropia. d. Antimetropia.
Hyperopia.
. If a lens has more seems to be stronger when the glasses slide down the nose, then
the lens is correcting for __________________ a. Hyperopia. b. Myopia. c. Amblyopia.
d. Presbyopia.
Biconvex
. A lens that has a plus curve on the front surface and a front curve on the back surface
is called a _____________. a. Biconcave b. Bitoric c. Lenticular d. Biconvex
Sphero-cylinder
If a lens exhibits a scissoring motion, then it is a ______________ lens. a. Sphero-
cylinder b. Meniscus c. Lenticular d. Progressive
Curves
An optical cross represents the physical __________ of a lens. a. Waves b. Curves c.
Gradients d. Thickness
Meniscus
A lens that has a plus curve on the front surface and a minus curve on the back surface
is called a _____________ lens. a. Biconcave b. Bitoric c. Lenticular d. Meniscus
Powers in the principal meridians.
Transposing is conducted to determine ____________ a. Thickness. b. Near power. c.
Lens compensation. d. Powers in the principal meridians.
. Executive
Which lens would be the heaviest, all factors being the same? a. Executive b. Round 22
c. FT35 d. Ultex
Refracted.
.When a white light is broken down into its component colors, it is __________ a.
Aberrated. b. Refracted. c. Reflected. d. Diffracted.
. Glass
.The velocity of light is the least in ______________ a. Water b. Snow c. Glass d. Air
, . 186,000 miles per second
.___________________ is the speed of light. a. 186,000 miles per hour b. 186,000
miles per second c. 186,000 millimeters per hour d. 186,000 millimeters per second
. A spherical and a cylinder component of the lens
Compound lenses have __________________ a. Two different lens materials
laminated together. b. A segmented add on a single vision lens carrier c. A bifocal
placed on the top or the bottom of the lens d. A spherical and a cylinder component of
the lens.
Spherical aberration
_____________________ is the aberration that is of most concern to the lens designer.
a. Spherical aberration b. Abbe c. Distortion d. Coma
. Vertical
A slab-off is ground on the lens with the least amount of power in the _______________
meridian. a. Primary b. Horizontal c. Vertical d. Oblique
Reflected, Refracted, and Absorbed.
Light, when it reaches the surface of a lens, is ____________a. Reflected. b. Refracted.
c. Absorbed. d. Reflected, Refracted, and Absorbed.
Wavelength.
The measure of a light from trough to trough is called a _______________ a.
Nanometer. b. Wavelength. c. Spectrograph. d. Vertometer.
Axial ray
The ray that passes through a lens without being deviated is known as the _______ a.
Normal. b. Axial ray. c. Divergent ray. d. Incident ray.
Base Down Most Plus
.A reverse slab-off has prism ground_______________ a. Base Up Most Minus. b.
Base Down Most Minus. c. Base Up Most Plus. d. Base Down Most Plus.
Scissoring.
All lenses surfaced with toricity exhibits ___________ a. With motion. b. Scissoring. c.
Magnification. d. Against motion.
58.
.CR-39 has a nu-value of ____________ a. 58. b. 30. c. 45. d. 68.
Slab-off.
Bicentric grinding is also known as _____________ a. Edging. b. Surfacing. c. Glazing.
d. Slab-off.
. BD
A plus lens that has mistakenly been measured with an optical center too low exhibits
__________ prism. a. BI b. BD c. BO d. BU
. At the geometric center.
The optical center of a round seg is located ______________ a. 4mm from the top of
the seg. b. At the top of the seg. c. At the geometric center. d. 10mm from the top of the
seg.
With
A lens designed to treat myopia exhibits _________________ motion. a. Oblique b.
Scissoring c. With d. Against
Toward the normal.
Exam Questions And Correct Answers.
. Columbia Resin-39.
. Lenses that commonly referred to as plastic are made of a material called
___________ a. Zylonite. b. Columbia Resin-39. c. Hivex. d. Polycarbonate.
Runs perpendicular to
The "normal" is an imaginary line that ________________ the lens surface. a. Refracts
through b. Runs parallel to c. Runs perpendicular to d. Reflects off of
.Simple hyperopic astigmatism
. +3.00 -3.00 x 180 is an indication of a _______________ a. Simple myopic
astigmatism. b. Mixed astigmatism. c. Compound hyperopic astigmatism. d. Simple
hyperopic astigmatism.
Emmetropia.
A patient that presents with a plano prescription is diagnosed with ____________ a.
Astigmatism. b. Hyperopia. c. Emmetropia. d. Antimetropia.
Hyperopia.
. If a lens has more seems to be stronger when the glasses slide down the nose, then
the lens is correcting for __________________ a. Hyperopia. b. Myopia. c. Amblyopia.
d. Presbyopia.
Biconvex
. A lens that has a plus curve on the front surface and a front curve on the back surface
is called a _____________. a. Biconcave b. Bitoric c. Lenticular d. Biconvex
Sphero-cylinder
If a lens exhibits a scissoring motion, then it is a ______________ lens. a. Sphero-
cylinder b. Meniscus c. Lenticular d. Progressive
Curves
An optical cross represents the physical __________ of a lens. a. Waves b. Curves c.
Gradients d. Thickness
Meniscus
A lens that has a plus curve on the front surface and a minus curve on the back surface
is called a _____________ lens. a. Biconcave b. Bitoric c. Lenticular d. Meniscus
Powers in the principal meridians.
Transposing is conducted to determine ____________ a. Thickness. b. Near power. c.
Lens compensation. d. Powers in the principal meridians.
. Executive
Which lens would be the heaviest, all factors being the same? a. Executive b. Round 22
c. FT35 d. Ultex
Refracted.
.When a white light is broken down into its component colors, it is __________ a.
Aberrated. b. Refracted. c. Reflected. d. Diffracted.
. Glass
.The velocity of light is the least in ______________ a. Water b. Snow c. Glass d. Air
, . 186,000 miles per second
.___________________ is the speed of light. a. 186,000 miles per hour b. 186,000
miles per second c. 186,000 millimeters per hour d. 186,000 millimeters per second
. A spherical and a cylinder component of the lens
Compound lenses have __________________ a. Two different lens materials
laminated together. b. A segmented add on a single vision lens carrier c. A bifocal
placed on the top or the bottom of the lens d. A spherical and a cylinder component of
the lens.
Spherical aberration
_____________________ is the aberration that is of most concern to the lens designer.
a. Spherical aberration b. Abbe c. Distortion d. Coma
. Vertical
A slab-off is ground on the lens with the least amount of power in the _______________
meridian. a. Primary b. Horizontal c. Vertical d. Oblique
Reflected, Refracted, and Absorbed.
Light, when it reaches the surface of a lens, is ____________a. Reflected. b. Refracted.
c. Absorbed. d. Reflected, Refracted, and Absorbed.
Wavelength.
The measure of a light from trough to trough is called a _______________ a.
Nanometer. b. Wavelength. c. Spectrograph. d. Vertometer.
Axial ray
The ray that passes through a lens without being deviated is known as the _______ a.
Normal. b. Axial ray. c. Divergent ray. d. Incident ray.
Base Down Most Plus
.A reverse slab-off has prism ground_______________ a. Base Up Most Minus. b.
Base Down Most Minus. c. Base Up Most Plus. d. Base Down Most Plus.
Scissoring.
All lenses surfaced with toricity exhibits ___________ a. With motion. b. Scissoring. c.
Magnification. d. Against motion.
58.
.CR-39 has a nu-value of ____________ a. 58. b. 30. c. 45. d. 68.
Slab-off.
Bicentric grinding is also known as _____________ a. Edging. b. Surfacing. c. Glazing.
d. Slab-off.
. BD
A plus lens that has mistakenly been measured with an optical center too low exhibits
__________ prism. a. BI b. BD c. BO d. BU
. At the geometric center.
The optical center of a round seg is located ______________ a. 4mm from the top of
the seg. b. At the top of the seg. c. At the geometric center. d. 10mm from the top of the
seg.
With
A lens designed to treat myopia exhibits _________________ motion. a. Oblique b.
Scissoring c. With d. Against
Toward the normal.
