ABO EXAM PRE-TEST
A patient complains that the floor seems to be concave, is possible experiencing excessive
A. Base In Prism
B. Base Out Prism
C. Base Down Prism
D. Base Up Prism - Base Down Prism
A -3.00 powered lens has a base curve of +4.25. What is the ocular curve?
A. +3.00
B. -4.25
C. -3.00
D. -7.25 - 100
A +2.00 diopter lens decentered in 5mm beyond the patients measured pd will create
A. 1 diapter base out prism
B. 2 diapters base out prism
C. 1 diapter base in prism
D. 2 diapters base in prism - 1 diapter base in prism
A +3.00 lens has the following prismatic effect at 10 mm below the distance optical center:
A. 3 diapters base up
B. 3 diapters base down
C. 1.5 diapters base in
D. 1.5 diapters base out - 3 diapters base up
A 10.00 diapter surface measured with a lens clock has a radius of curvature equaling;
A. 60mm
,B. 98.6mm
C. 53mm
D. 88.3mm - 53mm
A Box O graph is used to measure lenses for
A. Axis
B. Power
C. Thickness
D. Size - Size
A condition that describes an inflammation of the eyelid margins is
A. Exophoria
B. Esophoria
C. Blepharitis
D. Strabismus - Blepharitis
A lens having a minus curve on both front and back is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave - Biconcave
A lens that is cresent shaped with one of the sides measuring a six diopter radius is known as a :
A. Periscopic Lens
B. Bent Lens
C. Meniscus Lens
D. None of the Above - Meniscus lens
, A lens which reads +3.00 -2.00 x180 is decentered in 6mm too much. How much horizontal prism is
created by this error.
A. 1.8 diapters base in
B. 1.8 diapters base out
C. .6 diapters base in
D. .6 diapters base out - 1.8 diapters base in
A minimum center thickness for a minus industrial lens according to Z87 standards is
A. 1.5 mm
B. 2.0 mm
C. 3.0 mm
D. 3.5 mm - 3.0mm
A minus 5 diapter lens decentered in 2mm beyond what is called for to achieve the correct PD creates:
A. 1 diapter of base in prism
B. 1 diapter of base out prism
C. 2 diapters of base in prism
D. 2 diapters of base out prism - 1 diapter of base out prism
A minus lens decentered "out" will result in a finished lens which is
A. Balanced
B. Thicker temporally
C. Thicker nasally
D. Uniform in edge thickness - Thicker nasally
80 degrees from the specified axis, a cylinder will show
A. 5% of its power
B. 10% of its power
C. 50% of its power
D. 97% of its power - 97% if its power
A patient complains that the floor seems to be concave, is possible experiencing excessive
A. Base In Prism
B. Base Out Prism
C. Base Down Prism
D. Base Up Prism - Base Down Prism
A -3.00 powered lens has a base curve of +4.25. What is the ocular curve?
A. +3.00
B. -4.25
C. -3.00
D. -7.25 - 100
A +2.00 diopter lens decentered in 5mm beyond the patients measured pd will create
A. 1 diapter base out prism
B. 2 diapters base out prism
C. 1 diapter base in prism
D. 2 diapters base in prism - 1 diapter base in prism
A +3.00 lens has the following prismatic effect at 10 mm below the distance optical center:
A. 3 diapters base up
B. 3 diapters base down
C. 1.5 diapters base in
D. 1.5 diapters base out - 3 diapters base up
A 10.00 diapter surface measured with a lens clock has a radius of curvature equaling;
A. 60mm
,B. 98.6mm
C. 53mm
D. 88.3mm - 53mm
A Box O graph is used to measure lenses for
A. Axis
B. Power
C. Thickness
D. Size - Size
A condition that describes an inflammation of the eyelid margins is
A. Exophoria
B. Esophoria
C. Blepharitis
D. Strabismus - Blepharitis
A lens having a minus curve on both front and back is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave - Biconcave
A lens that is cresent shaped with one of the sides measuring a six diopter radius is known as a :
A. Periscopic Lens
B. Bent Lens
C. Meniscus Lens
D. None of the Above - Meniscus lens
, A lens which reads +3.00 -2.00 x180 is decentered in 6mm too much. How much horizontal prism is
created by this error.
A. 1.8 diapters base in
B. 1.8 diapters base out
C. .6 diapters base in
D. .6 diapters base out - 1.8 diapters base in
A minimum center thickness for a minus industrial lens according to Z87 standards is
A. 1.5 mm
B. 2.0 mm
C. 3.0 mm
D. 3.5 mm - 3.0mm
A minus 5 diapter lens decentered in 2mm beyond what is called for to achieve the correct PD creates:
A. 1 diapter of base in prism
B. 1 diapter of base out prism
C. 2 diapters of base in prism
D. 2 diapters of base out prism - 1 diapter of base out prism
A minus lens decentered "out" will result in a finished lens which is
A. Balanced
B. Thicker temporally
C. Thicker nasally
D. Uniform in edge thickness - Thicker nasally
80 degrees from the specified axis, a cylinder will show
A. 5% of its power
B. 10% of its power
C. 50% of its power
D. 97% of its power - 97% if its power
