ABO Exam Questions and Answers Latest
vitreous humor the transparent, colorless mass of soft, gelatinous material which fills the eyeball
behind the lens:
1.42 the index of refraction of the crystalline lens is:
1.37 the cornea has an index of refraction of:
6 the extra-ocular muscles are inserted into the sclera and serve to rotate the eye in
all possible directions. There are _______________ of these muscles in each eye.
sclera and cornea the fibrous tunic is comprised of the:
in the brain fusion occurs:
the ciliary body the aqueous fluid is continually being manufactured by:
accommodation the ability of the eye to bring objects if varying distances to focus on the retina is
known as:
myopia when accommodation is at rest, rays of light from a distant source come to focus in
front of the retina. this condition is known as:
hyperopia when accommodation is at rest, rays of light from a distant source come to focus
behind the retina. this condition is known as:
optic nerve impulses are carried from the retina to the brain along the:
the pupils constrict, the eyes converge, & the crystalline while reading, or performing other near vision tasks:
lens accommodates
forvea centralis that area of the retina capable if perceiving the greatest amount of details is:
43 diopters the average cornea has a refractive power of approximately:
the epithelium that layer if the cornea which is highly regenerative is:
, ABO Exam Questions and Answers Latest
rods Night vision is chiefly a function of the:
esophoria A tendency of the visual axis to deviate inward when the eyes are in a position of
the rest is known as:
hyperopic A "farsighted" eye is one that is:
diplopia The term used to indicate "double vision" is:
presbyopia The condition in which the ability to accommodate for near vision ecomes
inadequate because of loss of elasticity of the crystalline lens is called:
amblyopia When there is loss of vision without any apparent disease of the eye, it is known as:
astigmatism A refractive error in which the rays of light do not come to a single point of focus is
called:
cataract The condition in which the crystalline lens of the eye gradually loses its
transparency with consequent loss of visual acuity is known as:
glaucoma An ocular disease as its primary characteristic a sustained increase in intraocular
pressure.
posterior chamber The space between the back of the iris and the front of the lens which is filled with
aqueous is the:
hyperphoria A tendency of one eye to deviate upward is:
cones The photosensitive receptors of the retina which are responsible for sharp visual
acuity and color perception are the:
the stroma The layer of the cornea which comprises ninety percent of its thickness is:
anisometropia A condition in which the refractive error of one eye significantly differs from that of
the other and where both eyes have the same sign (i.e. both eyes are myopic or
myperopic) is known as:
compound hyperopic astigmatism The refractive error which results in two points of focus falling behind the retina is:
, ABO Exam Questions and Answers Latest
irregular astigmatism The refractive condition caused by a damaged cornea so that rays of light come to
many focal points on the retina is known as:
IN When the optical centers of a pair of plus lenses are positioned narrower than the
PD, it produces prism base...
OUT When the optical centers of a pair of minus lenses are positioned narrower than the
PD, it produces prism base...
DOWN When a patient looks through a plus lens above the optical center, it produces prism
base...
DOWN When a patient looks through a minus lens below the optical center, it produces
prism base...
1.0 How much prism is induced 5 mm away from the optical center of a +2.00 diopter
lens?
0.25 How much prism is induced 10 mm away from the optical center of a -0.25 diopter
lens?
3.2 How much prism is induced 2 mm away from the optical center of a +16.00 diopter
lens?
0.9 BASE OUT came in with the optical centers positioned 61 mm apart. The work order indicates
the patient's PD measures 64 mm and the prescription calls fro a -3.00 spheres in
each eye. How much total prism is induced and in which direction is the base?
1.45 BASE OUT A patient's prescription calls for OD: +4.75 OS: +2.50. The optical centers of the
finished spectacles are found to be positioned 4 mm too wide. How much total
prism is induced and in which direction is the base?
air the index of refraction is lowest in:
toward the base when parallel rays of light enter prism, the light is deviated:
39.37 one meter is equal to _______ inches.
200 two meters equal ______ centimeters.
dividing the speed of light in air by the speed of light in the the index of refraction of any given transparent material can be determined by:
material.
, ABO Exam Questions and Answers Latest
186,000 miles per second the speed of light in air is approximately:
refraction when the direction of light is deviated in the course of the passing from one
transparent medium to another it is known:
1.70 light travels through a certain transparent medium at the rate of approximately
109,412 miles per sec. the index of refraction of that medium is:
1 prism diopter if a prism can displace an image one centimeter at a distance of one meter, it is said
to have a power of:
wavelength the distance between the crest of two waves is called the:
-20 cm the focal length of a -5.00 diopter lens is:
base up prism decentering a plus lens upward will result in:
corpuscular the _________________ theory describes light as traveling through space in
minute bursts of energy.
+0.50 diopters if a converging lens has a focal length of +2 meters, its power is:
390 and 750 nanometers visible light is part of the overall spectrum of radiant energy. although the range of
wavelengths of which are perceived as visible light can vary with the individual, it is
generally understood to lie between:
power of the lens X the decentration in mm / 10 prentice's rule states that the amount of induced prism is equal to:
0.6 prism diopters base in a pair of spectacles were ordered with a prescription of -2.00D in each eye and a
PD of 63 mm. they were received from the lab with the optical centers set 66mm
apart. how much total prism was induced and in which direction is the base?
0.8 prism diopters base out a pair of +4.00 spectacle lenses were ordered from the laboratory with a PD of 59
mm. when these lenses were verified, it was determined that the optical centers
were positioned 4mm too wide. how much prism was induced in each eye and in
which direction is the base?
virtual a diverging lens produces a _______ image.
+100 cm the focal length of a +1.00 diopter lens is:
vitreous humor the transparent, colorless mass of soft, gelatinous material which fills the eyeball
behind the lens:
1.42 the index of refraction of the crystalline lens is:
1.37 the cornea has an index of refraction of:
6 the extra-ocular muscles are inserted into the sclera and serve to rotate the eye in
all possible directions. There are _______________ of these muscles in each eye.
sclera and cornea the fibrous tunic is comprised of the:
in the brain fusion occurs:
the ciliary body the aqueous fluid is continually being manufactured by:
accommodation the ability of the eye to bring objects if varying distances to focus on the retina is
known as:
myopia when accommodation is at rest, rays of light from a distant source come to focus in
front of the retina. this condition is known as:
hyperopia when accommodation is at rest, rays of light from a distant source come to focus
behind the retina. this condition is known as:
optic nerve impulses are carried from the retina to the brain along the:
the pupils constrict, the eyes converge, & the crystalline while reading, or performing other near vision tasks:
lens accommodates
forvea centralis that area of the retina capable if perceiving the greatest amount of details is:
43 diopters the average cornea has a refractive power of approximately:
the epithelium that layer if the cornea which is highly regenerative is:
, ABO Exam Questions and Answers Latest
rods Night vision is chiefly a function of the:
esophoria A tendency of the visual axis to deviate inward when the eyes are in a position of
the rest is known as:
hyperopic A "farsighted" eye is one that is:
diplopia The term used to indicate "double vision" is:
presbyopia The condition in which the ability to accommodate for near vision ecomes
inadequate because of loss of elasticity of the crystalline lens is called:
amblyopia When there is loss of vision without any apparent disease of the eye, it is known as:
astigmatism A refractive error in which the rays of light do not come to a single point of focus is
called:
cataract The condition in which the crystalline lens of the eye gradually loses its
transparency with consequent loss of visual acuity is known as:
glaucoma An ocular disease as its primary characteristic a sustained increase in intraocular
pressure.
posterior chamber The space between the back of the iris and the front of the lens which is filled with
aqueous is the:
hyperphoria A tendency of one eye to deviate upward is:
cones The photosensitive receptors of the retina which are responsible for sharp visual
acuity and color perception are the:
the stroma The layer of the cornea which comprises ninety percent of its thickness is:
anisometropia A condition in which the refractive error of one eye significantly differs from that of
the other and where both eyes have the same sign (i.e. both eyes are myopic or
myperopic) is known as:
compound hyperopic astigmatism The refractive error which results in two points of focus falling behind the retina is:
, ABO Exam Questions and Answers Latest
irregular astigmatism The refractive condition caused by a damaged cornea so that rays of light come to
many focal points on the retina is known as:
IN When the optical centers of a pair of plus lenses are positioned narrower than the
PD, it produces prism base...
OUT When the optical centers of a pair of minus lenses are positioned narrower than the
PD, it produces prism base...
DOWN When a patient looks through a plus lens above the optical center, it produces prism
base...
DOWN When a patient looks through a minus lens below the optical center, it produces
prism base...
1.0 How much prism is induced 5 mm away from the optical center of a +2.00 diopter
lens?
0.25 How much prism is induced 10 mm away from the optical center of a -0.25 diopter
lens?
3.2 How much prism is induced 2 mm away from the optical center of a +16.00 diopter
lens?
0.9 BASE OUT came in with the optical centers positioned 61 mm apart. The work order indicates
the patient's PD measures 64 mm and the prescription calls fro a -3.00 spheres in
each eye. How much total prism is induced and in which direction is the base?
1.45 BASE OUT A patient's prescription calls for OD: +4.75 OS: +2.50. The optical centers of the
finished spectacles are found to be positioned 4 mm too wide. How much total
prism is induced and in which direction is the base?
air the index of refraction is lowest in:
toward the base when parallel rays of light enter prism, the light is deviated:
39.37 one meter is equal to _______ inches.
200 two meters equal ______ centimeters.
dividing the speed of light in air by the speed of light in the the index of refraction of any given transparent material can be determined by:
material.
, ABO Exam Questions and Answers Latest
186,000 miles per second the speed of light in air is approximately:
refraction when the direction of light is deviated in the course of the passing from one
transparent medium to another it is known:
1.70 light travels through a certain transparent medium at the rate of approximately
109,412 miles per sec. the index of refraction of that medium is:
1 prism diopter if a prism can displace an image one centimeter at a distance of one meter, it is said
to have a power of:
wavelength the distance between the crest of two waves is called the:
-20 cm the focal length of a -5.00 diopter lens is:
base up prism decentering a plus lens upward will result in:
corpuscular the _________________ theory describes light as traveling through space in
minute bursts of energy.
+0.50 diopters if a converging lens has a focal length of +2 meters, its power is:
390 and 750 nanometers visible light is part of the overall spectrum of radiant energy. although the range of
wavelengths of which are perceived as visible light can vary with the individual, it is
generally understood to lie between:
power of the lens X the decentration in mm / 10 prentice's rule states that the amount of induced prism is equal to:
0.6 prism diopters base in a pair of spectacles were ordered with a prescription of -2.00D in each eye and a
PD of 63 mm. they were received from the lab with the optical centers set 66mm
apart. how much total prism was induced and in which direction is the base?
0.8 prism diopters base out a pair of +4.00 spectacle lenses were ordered from the laboratory with a PD of 59
mm. when these lenses were verified, it was determined that the optical centers
were positioned 4mm too wide. how much prism was induced in each eye and in
which direction is the base?
virtual a diverging lens produces a _______ image.
+100 cm the focal length of a +1.00 diopter lens is:
