Multiple Choice Abo Practice Exam With Correct Answers

MULTIPLE CHOICE ABO PRACTICE
EXAM

1. Which of the following glass lenses is a fused bifocal?
A. Executive
B. Progressive
C. Straight Top
D. Ultex - ANSWER-C. Straight Top



2. If Rx is +2.00-4.00X45, it would be necessary to decenter the lens
_______ mm to create 1 diopter of base out prism.
A. 2mm
B. 4mm
C. 6mm
D. Not possible - ANSWER-D. Not possible



3. The element in photo-gray lenses that creates the lightning and
darkening reaction is...
A. Silver Nitrate
B. Ferrous Oxide
C. Silver Halide
D. Flint - ANSWER-C. Silver Halide



4. A minus lens moved downward from the primary position will result in
what type of prism?
A. BU Prism
B. BD Prism
C. BI Prism
D. BO Prism - ANSWER-A. BU Prism



5. A patient refracted at 15mm is prescribed a -10.00 sphere. The
dispenser finds the actual refracted distance at 10mm. What should
the compensated Rx of the lens power be?
A. -9.50

, B. -9.75
C. -10.75
D. -10.50 - ANSWER-A. -9.50



6. A lens which reads +3.00-2.00X180 is decentered in 6mm too much.
How much horizontal prism is created by this error?
A. 1.8 D BI
B. 1.8 D BO
C. 6 D BI
D. 6 D BO - ANSWER-A. 1.8 D BI



7. If a pair of lenses are ground with diopters of BI prism in each lens, the
patient will experience...
A. 4 D of prism BI
B. 2 D of prism BO
C. No prism
D. None of the above - ANSWER-A. 4 D of prism BI



8. Given a lens with a focal length of 1,000 mm, what would be the power
of the lens in diopters?
A. 1 D
B. 5 D
C. 10 D
D. 100 D - ANSWER-A. 1 D



9. Which wavelengths of light have been indicated as contributors to the
onset of cataracts?
A. 700-800 nm
B. 400-500 nm
C. 300-380 nm
D. 100 and below nm - ANSWER-C. 300-380 nm



10. The refractive astigmatism indicated by the Rx of +1.50-
1.00X180 would be...
A. Compound Hyperopic

, B. Mixed
C. Simple Myopic
D. Anti-metropic - ANSWER-A. Compound Hyperopic



11. The refractive astigmatism indicated by the Rx of +1.50-1.75X35
is...
A. Compound Hyperopic
B. Mixed
C. Simple Myopic
D. Anti-metropic - ANSWER-B. Mixed



12. A patient has an Rx of -1.75-0.50X120 with a +2.00 Add standard
trifocal. What is the power through the intermediate area of the
lenses?
A. -1.25-0.50x120
B. -0.75-0.50x120
C. -0.75-0.50x30
D. -1.00-0.50X150 - ANSWER-B. -0.75-0.50x120



13. The Geneva Lens Measure is designed to measure what?
A. Path length
B. Refractive efficiency
C. Focal length
D. Lens curvature - ANSWER-D. Lens curvature



14. The focal length of a +5.00 lens is...
A. 20 cm
B. 50 cm
C. 39.57 in
D. 2 meters - ANSWER-A. 20 cm



15. The problem of prismatic imbalance at the reading level is
called...
A. Antimetropia
B. Anisometropia

, C. Anisekonia
D. Emmetropia - ANSWER-B. Anisometropia



16. Which of the following indicates the most acute distance vision?
A. 20/20
B. 20/30
C. 20/15
D. 20/25 - ANSWER-C. 20/15



17. Which of the following is NOT a potential correction for vertical
imbalance?
A. Slab off
B. Near only readers
C. Reverse slab off
D. Vertex compensation - ANSWER-D. Vertex Compensation



18. Anisekonia can occur due to...
A. Prismatic imbalance
B. Myopia
C. Unequal size of retinal images
D. Keratoconus - ANSWER-C. Unequal size of retinal images



19. The corner of the eye where the upper and lower lids meet is
called the...
A. Canthus
B. Iris
C. Limbus
D. Chiasm - ANSWER-A. Canthus



20. A ptosis crutch is used to correct....
A. Prism imbalance
B. Drooping lid
C. Phoria
D. Scotoma - ANSWER-B. Drooping lid