ABO-NCLE practical Exam questions with correct
answers
The refractive astigmatism indicated by the RX
+1.50 -1.75 x 35 is - ANSWER Mixed
The patient's RX is -1.75 -.50 x 120 with a +2.00 ADD standard trifocal. What is the
power through the intermediate? - ANSWER -.75 -.50 x 120
The Geneva lens measure is designed to measure - ANSWER Lens curvature
The focal length of a +5.00 diopter lens is - ANSWER 20 cm
The problem of prismatic imbalance at the reading level is called - ANSWER
Anisometropia
Which of the following indicated the most acute distance vision? - ANSWER 20/15
Which of the following is not a potential correction for vertical balance? - ANSWER
Vertex Compensation
The ability of the eye to focus on objects at varying distances is known as -
ANSWER Accomodation
Anisekonia is due to - ANSWER Unequal size retinal images
The corner of the eye where the upper and lower lids meet is the - ANSWER
Canthus
A ptosis crutch is used to - ANSWER Drooping lid
In neutralizing a lens of unknown power your first reading is +1.00 the next reading
that focuses the cylinder target is -.25. What is the RX? - ANSWER +1.00 -1.25
A +2.00 lens decentered in 5 mm beyond the patient's measured pd will create -
ANSWER 1 diopter base in prism
Which of the following conditions is indicated by the following RX:
O.D. +1.00 -1.00 x 180
O.S. -2.00 -.50 x 45 - ANSWER Antimetropia
The loss of vision without any apparent defect to the eye is called - ANSWER
Amblyopia
, The ANSI cylinder tolerance for a -.25 cylinder is - ANSWER Plus or minus 7
degrees
Which of the following has no power in the 180 degree meridian? - ANSWER
+2.00 -2.00 x 90
All specifications being equal which of the following materials will yield the thinnest
lens? - ANSWER Polycarbonate
If the right temple is angled up the effect on the frame will be to - ANSWER Lower
the right side
If the adjustable pads on a metal frame are re-positioned downwards into the bridge
of the frame the resulting effect on the fit will be to - ANSWER Raise the front
Which recreational activity would be best suited with yellow lenses? - ANSWER
Hunting
Bicentrec grinding is a term synonymous with - ANSWER Slab off
If a patient is wearing a +12.00 diopter sphere and the adjustment is made to move
them closer to the eyes, what effect will that have on the effective power of the lens?
- ANSWER Decrease the plus power
Which RX of the following is the same as the following RX: -3.00 +2.50 x 25 -
ANSWER -.50 -2.50 x 115
Given a material of unknown index and the speed of light within that material as
10100 miles per second. Compute the index of refraction for that material. -
ANSWER 1.62
Which of the following materials would make the safest lens in all circumstances? -
ANSWER Polycarbonate
This agency is primarily concerned with safety in the workplace. - ANSWER OSHA
Which of the following RX lenses should never be put into a Z87 frame? - ANSWER
None of the above (not 2 mm nor 3 mm)
If your lensometer reads +.25 with no lens, a lens that measures -3.00 -1.50 x 180 is
actually - ANSWER -2.75 -1.50 x 180
When verifying an ADD on a 1 piece bifocal with a lens clock, a +2.00 ADD would
clock _____ in the distance and _____ in the segment. - ANSWER +6.12, +8.12
What should you do when a consumer comes in and complains of severe eye pain?
- ANSWER Refer them back to the eye doctor
The radius of curvature of a six diopter surface is - ANSWER 88.3 mm
answers
The refractive astigmatism indicated by the RX
+1.50 -1.75 x 35 is - ANSWER Mixed
The patient's RX is -1.75 -.50 x 120 with a +2.00 ADD standard trifocal. What is the
power through the intermediate? - ANSWER -.75 -.50 x 120
The Geneva lens measure is designed to measure - ANSWER Lens curvature
The focal length of a +5.00 diopter lens is - ANSWER 20 cm
The problem of prismatic imbalance at the reading level is called - ANSWER
Anisometropia
Which of the following indicated the most acute distance vision? - ANSWER 20/15
Which of the following is not a potential correction for vertical balance? - ANSWER
Vertex Compensation
The ability of the eye to focus on objects at varying distances is known as -
ANSWER Accomodation
Anisekonia is due to - ANSWER Unequal size retinal images
The corner of the eye where the upper and lower lids meet is the - ANSWER
Canthus
A ptosis crutch is used to - ANSWER Drooping lid
In neutralizing a lens of unknown power your first reading is +1.00 the next reading
that focuses the cylinder target is -.25. What is the RX? - ANSWER +1.00 -1.25
A +2.00 lens decentered in 5 mm beyond the patient's measured pd will create -
ANSWER 1 diopter base in prism
Which of the following conditions is indicated by the following RX:
O.D. +1.00 -1.00 x 180
O.S. -2.00 -.50 x 45 - ANSWER Antimetropia
The loss of vision without any apparent defect to the eye is called - ANSWER
Amblyopia
, The ANSI cylinder tolerance for a -.25 cylinder is - ANSWER Plus or minus 7
degrees
Which of the following has no power in the 180 degree meridian? - ANSWER
+2.00 -2.00 x 90
All specifications being equal which of the following materials will yield the thinnest
lens? - ANSWER Polycarbonate
If the right temple is angled up the effect on the frame will be to - ANSWER Lower
the right side
If the adjustable pads on a metal frame are re-positioned downwards into the bridge
of the frame the resulting effect on the fit will be to - ANSWER Raise the front
Which recreational activity would be best suited with yellow lenses? - ANSWER
Hunting
Bicentrec grinding is a term synonymous with - ANSWER Slab off
If a patient is wearing a +12.00 diopter sphere and the adjustment is made to move
them closer to the eyes, what effect will that have on the effective power of the lens?
- ANSWER Decrease the plus power
Which RX of the following is the same as the following RX: -3.00 +2.50 x 25 -
ANSWER -.50 -2.50 x 115
Given a material of unknown index and the speed of light within that material as
10100 miles per second. Compute the index of refraction for that material. -
ANSWER 1.62
Which of the following materials would make the safest lens in all circumstances? -
ANSWER Polycarbonate
This agency is primarily concerned with safety in the workplace. - ANSWER OSHA
Which of the following RX lenses should never be put into a Z87 frame? - ANSWER
None of the above (not 2 mm nor 3 mm)
If your lensometer reads +.25 with no lens, a lens that measures -3.00 -1.50 x 180 is
actually - ANSWER -2.75 -1.50 x 180
When verifying an ADD on a 1 piece bifocal with a lens clock, a +2.00 ADD would
clock _____ in the distance and _____ in the segment. - ANSWER +6.12, +8.12
What should you do when a consumer comes in and complains of severe eye pain?
- ANSWER Refer them back to the eye doctor
The radius of curvature of a six diopter surface is - ANSWER 88.3 mm
