POST TEST FOR MODULE 36:  Hard Contact Lenses, Part 2      Catalog

                                                                   

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1. Hard contact lens flexure can be observed with:

A. a radiuscope

B. the slit lamp microscope

C. a retinoscope

D. fluorescein

2. The most common cause of residual astigmatism is:

A. contact lens flexure

B. a warped contact lens

C. corneal astigmatism

D. lenticular astigmatism

3. A fluorescein pattern that shows a smaller area of light green in the center and a larger area of a deeper tear layer at the periphery of the lens, indicates:

A. a lens that is perfectly fit

B. a lens that is fit relatively flat

C. a lens that is fit relatively steep

D. a cornea with significant astigmatism

4. A fluorescein pattern that resembles a "dumbbell" shape indicates:

A. a lens that is perfectly fit

B. a lens that is fit relatively flat

C. a lens that is fit relatively steep

D. a cornea with significant astigmatism

5. So called "3 and 9 o'clock" fluorescein staining of the cornea is typically caused by:

A. mechanical rubbing by the the periphery of the lens

B. a foreign body under the contact lens

C. rough blends between the peripheral curves of the contact lens

D. air bubbles trapped under the contact lens

6. "Arcuate" fluorescein staining of the cornea is typically caused by:

A. mechanical rubbing by the the periphery of the lens

B. a foreign body under the contact lens

C. rough blends between the peripheral curves of the contact lens

D. air bubbles trapped under the contact lens

7. Which is the term used for the process of corneal endothelial cells enlarging to replace damaged cells?

A. megacellathism

B. polymegathism

C. polycellitis

D. overcrowding

8. "Spectacle blur" is cause by:

A. a change in the length of the eye while wearing contact lenses

B. the hard contact lens molding to the shape of the cornea

C. the cornea molding to the shape of the contact lens

D. putting on your glasses while wearing your contact lenses

9. "Orthokeratology" is a hard contact lens fitting technique employed to:

A. reduce the power of a nearsighted correction

B. improve oxygen flow to the cornea

C. correct residual astigmatism

D. improve an eye muscle weakness with contact lenses

10. Taking measurements and sending the measurements to a contact lens manufacturer to make the lens describes:

A. orthokeratology fitting

B. diagnostic fitting

C. lenticular fitting

D. empirical fitting

11. The power of a hard contact lens can be read with a:

A. radiuscope

B. lensometer

C. trial lens set

D. the power cannot be read

12. What is it that holds the contact lens in place when using the radiuscope?

A. your fingers

B. a clamp

C. a drop of water

D. optical quality tissue paper

13. The mire that is focused with the radiuscope looks like a:

A. circle

B. plus sign

C. minus sign

D. star

14. The scale reading of the radiuscope is in:

A. millimeters

B. centimeters

C. meters

D. diopters

15. A hard contact lens is usually removed by:

A. pinching the lens with the thumb and index finger

B. blinking several times and then looking upward

C. placing a finger on the skin at the outer canthus and pulling outward before blinking

D. opening your eyes wide and hitting the back of your head with your fist