POST TEST FOR MODULE 47:  More on Refractometry    Catalog

                                                                   

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1. Which statement is most accurate:

A. It is usually OK to indicate unequal add powers.

B. It is never acceptable to indicate unequal add powers.

C. It is not usually a good idea to indicate unequal add powers, but it is sometimes necessary.

D. The technician should not be measuring add power.

2. Bifocal glasses should not have an add power less than 1 D because:

A. The patient probably does not need a bifocal yet.

B. The patient will probably think that the bifocal is not much help.

C. An add power less than 1 D cannot be made.

D. A and B

3. An add power greater than 2.50 D:

A. will move the near point closer than 16 inches

B. will move the near point farther away than 16 inches

C. will not affect the near point

D. can only be prescribed with base-in prism

4. Which set of cylinder power axes are not symmetrical?

A. OD 45 OS 135

B. OD 135 OS 45

C. OD 30 OS 60

D. OD 105 OS 75

5. When performing retinoscopy, we discover that the cylinder axis for the right eye is near 60 degrees.  It is likely that we may find that the cylinder axis for the left eye is near:

A. 120 degrees

B. 90 degrees

C. 30 degrees

D. 180 degrees

6. Which prescription indicates against-the-rule astigmatism?

A. +1.00+200x90

B. +1.00-200x90

C. +100-200x45

D. +0.50+1.00x75

7. Which statement is most likely true of the 55 year old patient with a plano-200x90 distance glasses prescription in both eyes.

A. He can see well in the distance without glasses (if he squints).

B. He will not need a bifocal in order to read with glasses.

C. He will probably be able to read OK without glasses.

D. He will probably like ketchup with his scrambled eggs

8. Which statement is most likely true of the 55 year old patient with a plano-200x180 distance glasses prescription in both eyes.

A. He can see well in the distance without glasses (if he squints).

B. He will not need a bifocal in order to read with glasses.

C. He will probably be able to read OK without glasses.

D. He will probably not like ketsup with his scrambled eggs

9. The Javal Rule has to do with:

A. The relationship between astigmatic correction and near vision

B. The relationship between keratometry readings and refractive power.

C. The relationship between astigmatic correction and distance vision.

D. The relationship between with-the-rule astigmatism and distance vision.

10. When K readings reveal astigmatism greater than 2.5 D, then the refractive cylinder correction is likely to be:

A. exactly 2.5 D

B. less than 2.5 D

C. more than 2.5 D

D. dependent upon the amount of spherical correction

11. Given the following K readings, which would be closest to the amount and axis of astigmatism?

K1: 46.50 x 180   K2:  42.00 x 90

A. -4.50 x 90

B. +4.50 x 90

C. -4.50 x 180

D. -3.50 x 90

12. An astigmatic dial can be used to find:

A. the axis of astigmatism

B. the power of the cylinder correction

C. both A and B

D. none of the above

13. When using an astigmatic dial, the vision of the eye being tested is fogged.

A. True

B. False

14. Which is not true of the red-green test?

A. another term for it is the "duochrome" test

B. it is a spherical refinement procedure

C. it is a binocular test

D. the test does not require good color vision

15. When performing the red/green test, what should be done next if the letters appear darker and sharper in the red?

A. add .25 D of minus sphere power

B. add .25 D of plus sphere power

C. add 1.00 D of minus sphere power

D. say "good job" to the patient and write down the current sphere power