ABO NCLE FINAL EXAM 2026/2027 QUESTIONS AND
SOLUTIONS RATED A+
✔✔If the RX is OS +1.00 +3.00 x 45 what would be the total power at axis 90? -
✔✔+2.50
✔✔A patient that complains that the floor seems to be concave is possibly experiencing
excessive - ✔✔Base down prism
✔✔What would the reading RX be if the following distance RX and bifocal addition are
given:
RX: +.75 -.25 x 90 ADD +1.00 - ✔✔+1.75 +.25 x 90
✔✔Corrected curve lenses have - ✔✔Less oblique astigmatism
✔✔A patient that complains the floor seems to be convex is possibly experiencing
excessive - ✔✔Base up prism
✔✔A minimum center thickness for a minus industrial lens according to Z87 Standards
is - ✔✔3.0 mm
✔✔Which of the following bifocals would offer the widest reading area? - ✔✔Executive
✔✔The Optician has just neutralized an unknown power lens with test lenses. The test
lens used to neutralize the power in the vertical in a +2.00 and the test lens used to
neutralize the power in the horizontal is a +3.00. What is the RX? - ✔✔-2.00 -1.00 x 90
✔✔The term diplopia refers to - ✔✔Double vision
✔✔The optical cross is a graphic representation used to diagram - ✔✔Total lens power
✔✔Determine imbalance at the reading level in the following prescription (10 mm
reading depth)
OD: -4.00 -2.00 x 90
OS: -1.00 -3.00 x 180 - ✔✔1 diopter
✔✔The refractive index to which optical tools and gauges are calibrated? - ✔✔1.53
✔✔A minus 5 diapter lens decentered in 2 mm beyond what is called for 1/10 achieve
the correct PD creates - ✔✔1 diopter of base out prism
✔✔Double D lens area an advantage for presbyobes that - ✔✔Work over their heads
, ✔✔The focal length of a +2.00 diapter lens is - ✔✔50 cm
✔✔Increasing the diameter of a lens always increases its - ✔✔Thickness
✔✔In the boxing system a A measurement represents - ✔✔Lens width
✔✔A 10.00 diapter surface measured with a lens clock has a radius of curvature
equaling - ✔✔53 mm
✔✔An uncut lens must be at least ___ mm in diameter to allow the cutting of a 52 mm
round lens decentered 4 mm in - ✔✔60
✔✔A -3.00 powered lens has a base curve of +4.25. What is the ocular curve? - ✔✔-
7.25
✔✔When ordering a six inch temple, its corresponding millimeter value is which of the
following? - ✔✔150 mm
✔✔What is the focal length of a 2 diapter lens? - ✔✔500 mm
✔✔Wavelengths are measured in - ✔✔Nanometers
✔✔Which of the following has the shortest and therefore most harmful wavelength? -
✔✔UVC
✔✔When two light waves are "in phase" they will? - ✔✔Compound one another
✔✔The cylinder axis tolerance for a 1.00D cylinder according to ANSIZ 80.1 is -
✔✔Plus or minus 2 degrees
✔✔A plus lens decentered "out" will result in a finished lens which is - ✔✔Thicker
temporally
✔✔A minus lens decentered "out" will result in a finished lens which is - ✔✔Thicker
nasally
✔✔An uncoated normal plastic lens will reflect approximately ___% of light. - ✔✔8%
✔✔A lens having a minus curve on both front and back is called - ✔✔Biconcave
✔✔Give the RX +1.00 +1.00 x 45, how much of the +1.00 cylinder is in effect at axis
90? - ✔✔50%
SOLUTIONS RATED A+
✔✔If the RX is OS +1.00 +3.00 x 45 what would be the total power at axis 90? -
✔✔+2.50
✔✔A patient that complains that the floor seems to be concave is possibly experiencing
excessive - ✔✔Base down prism
✔✔What would the reading RX be if the following distance RX and bifocal addition are
given:
RX: +.75 -.25 x 90 ADD +1.00 - ✔✔+1.75 +.25 x 90
✔✔Corrected curve lenses have - ✔✔Less oblique astigmatism
✔✔A patient that complains the floor seems to be convex is possibly experiencing
excessive - ✔✔Base up prism
✔✔A minimum center thickness for a minus industrial lens according to Z87 Standards
is - ✔✔3.0 mm
✔✔Which of the following bifocals would offer the widest reading area? - ✔✔Executive
✔✔The Optician has just neutralized an unknown power lens with test lenses. The test
lens used to neutralize the power in the vertical in a +2.00 and the test lens used to
neutralize the power in the horizontal is a +3.00. What is the RX? - ✔✔-2.00 -1.00 x 90
✔✔The term diplopia refers to - ✔✔Double vision
✔✔The optical cross is a graphic representation used to diagram - ✔✔Total lens power
✔✔Determine imbalance at the reading level in the following prescription (10 mm
reading depth)
OD: -4.00 -2.00 x 90
OS: -1.00 -3.00 x 180 - ✔✔1 diopter
✔✔The refractive index to which optical tools and gauges are calibrated? - ✔✔1.53
✔✔A minus 5 diapter lens decentered in 2 mm beyond what is called for 1/10 achieve
the correct PD creates - ✔✔1 diopter of base out prism
✔✔Double D lens area an advantage for presbyobes that - ✔✔Work over their heads
, ✔✔The focal length of a +2.00 diapter lens is - ✔✔50 cm
✔✔Increasing the diameter of a lens always increases its - ✔✔Thickness
✔✔In the boxing system a A measurement represents - ✔✔Lens width
✔✔A 10.00 diapter surface measured with a lens clock has a radius of curvature
equaling - ✔✔53 mm
✔✔An uncut lens must be at least ___ mm in diameter to allow the cutting of a 52 mm
round lens decentered 4 mm in - ✔✔60
✔✔A -3.00 powered lens has a base curve of +4.25. What is the ocular curve? - ✔✔-
7.25
✔✔When ordering a six inch temple, its corresponding millimeter value is which of the
following? - ✔✔150 mm
✔✔What is the focal length of a 2 diapter lens? - ✔✔500 mm
✔✔Wavelengths are measured in - ✔✔Nanometers
✔✔Which of the following has the shortest and therefore most harmful wavelength? -
✔✔UVC
✔✔When two light waves are "in phase" they will? - ✔✔Compound one another
✔✔The cylinder axis tolerance for a 1.00D cylinder according to ANSIZ 80.1 is -
✔✔Plus or minus 2 degrees
✔✔A plus lens decentered "out" will result in a finished lens which is - ✔✔Thicker
temporally
✔✔A minus lens decentered "out" will result in a finished lens which is - ✔✔Thicker
nasally
✔✔An uncoated normal plastic lens will reflect approximately ___% of light. - ✔✔8%
✔✔A lens having a minus curve on both front and back is called - ✔✔Biconcave
✔✔Give the RX +1.00 +1.00 x 45, how much of the +1.00 cylinder is in effect at axis
90? - ✔✔50%
