POST TEST FOR MODULE 3:
REFRACTOMETRY TECHNIQUES
Catalog Home
Including:
Section 1: Binocular Balancing
Section 2: High Power Refractometry
Section 3: Cylinder Power Confirmation
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1. Balancing is a refractive technique used to control:
A. tropias
B. accommodation
C. convergence
D. divergence
E. cheating
2. When balancing, the patient is fogged by adding _____ to the correction for each eye.
A. +0.25 D
B. -0.25 D
C. +0.75 D
D. -0.75 D
E. +2.00 D
3. When balancing, the patient responds by indicating which eye:
A. is blurry
B. sees clearer
C. feels strained
D. sees a double image
E. sees a red line
4. When balancing, _____ is added to the eye that sees clearer.
A. +0.25 D
B. -0.25 D
C. +0.75 D
D. -0.75 D
E. +2.00 D
5. When balancing is complete:
A. the right eye should have the best vision
B. the left eye should have the best vision
C. both eyes should have equal vision
D. the dominant eye should have the best vision
E. C or D
6. The vertex distance must be taken into account if the prescription is over _____ diopter(s).
A. 1
B. 2
C. 3
D. 4
E. 6
7. Vertex distance is measured with a:
A. distometer
B. PD ruler
C. millimeter ruler
D. centimeter ruler
E. laser beam
8. When measuring the vertex distance, the instrument touches:
A. the cornea and the back lens surface
B. the cornea and the front lens surface
C. the eyelid and the back lens surface
D. the eyelid and the front lens surface
E. the eyelid and the bridge of the frame
9. The over-refraction method is useful if:
A. the patient will use the same frames
B. the cylinder power has not decreased
C. the cylinder axis has not changed
D. all of the above
10. When using the trial frame, the sphere power should be placed in the:
A. front most slot (farthest from the eye)
B. 2nd from the front slot
C. back slot (closest to the eye)
D. none of the above
E. any of the above
11. When performing refractometry, it is best to find an endpoint that:
A. has no cylinder power
B. has some cylinder power
C. has the lowest cylinder power for the best vision
D. has the highest cylinder power for the best vision
E. has the least plus sphere power for the best vision
12. The spherically equivalent of -2.00+4.00x180 is:
A. plano
B. +2.00
C. -6.00
D. -2.00
13. When using a minus cylinder phoropter, if the cylinder power is increased by 0.50 D, then the sphere power must be _____ in order to keep the spherical equivalent.
A. changed -0.25 D
B. changed +0.25 D
C. changed +0.50 D
D. changed -0.50 D
E. left the same
14. When using a plus cylinder phoropter, if the cylinder power is increased by 0.50 D, then the sphere power must be _____ in order to keep the spherical equivalent.
A. changed -0.25 D
B. changed +0.25 D
C. changed +0.50 D
D. changed -0.50 D
E. left the same
15. When presenting a patient with spherically equivalent choices with the phoropter:
A. the sphere power is changed first
B. the cylinder power is changed first
C. the cylinder power is not changed
D. the sphere power is not changed
E. the sphere and cylinder power are changed simultaneously