Test your basic knowledge |

Certified Ophthalmic Assistant

Subjects : certifications, health-sciences

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. The difference between Schirmer's test I and II is...
to have little or no shadow
the use of an anesthetic
reflex tears
a staining agent

2. The ideal IOLMaster axial length graph is...
reflex tears
having them trace the number/figure
a staining agent
a tall - central spike with only one peak and smaller spikes on either site

3. A rose bengal does not require the use of...
IOL power
one-fourth
the cobalt blue filter
suspected acquired color defect

4. In an axial length A-scan - if there is only one tall echo from the back of the eye with no other echoes behind it - this indicates...
a staining agent
a tall - central spike with only one peak and smaller spikes on either site
severe dry eye
that the sound beam is directed to the optic disc and the measurement is incorrect

5. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
545 pm
IOL power
the cobalt blue filter

6. The IOLMaster evaluates each of the following except...
one-fourth
the patient is shown a sample that is discernable to normal and abnormal alike
refractive error
white to white corneal diameter

7. With the 1OLMaster - the ideal signal-to-noise ratio is...
ultrasound
the use of an anesthetic
2.0 or more
tear filter papers

8. Acquired color vision defects...
can often be cured if the causative factor is eliminated
patient wearing spectacles
reflex tears
that the sound beam is directed to the optic disc and the measurement is incorrect

9. A patient with which of the following potential diagnoses would be tested with bengal?
varies according to the type of test
severe dry eye
differentiate between congenital or acquired color blindness
the cobalt blue filter

10. Measuring time for the Schirmer's test is...
white to white corneal diameter
'test eye'
severe dry eye
5 minutes

11. In evaluating an axial length scan - the retinal echo must be...
23 to 24 mm
to have little or no shadow
10 seconds
to the left of the scleral and orbital echoes

12. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
refractive error
one-fourth
rods

13. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the patient should be tested with near correction - if worn
ultrasound
to have little or no shadow
the defect tends to remain stable over time

14. In which of the following would glare testing be most appropriate?
varies according to the type of test
holding the probe perpendicular to the corneal surface
posterior subcapsular cataract
decrease in vision due to glare conditions

15. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
tear filter papers
differentiate between congenital or acquired color blindness
normal tearing

16. The photosensitive pigments of the eye are sensitive to...
'test eye'
red - green - and blue
reflex tears
Allow the patient to adjust to the light level before reading the letters.

17. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
to have little or no shadow
narrow beam
both eyes equally
expensive equipment

18. Schirmer's test II is used to measure...
Allow the patient to adjust to the light level before reading the letters.
dacryocystitis
normal tearing
for screening purposes - such as job applications

19. When performing pachymetry prior to refractive surgery - it is generally best to begin...
varies according to the type of test administered
before starting school
with the central cornea
20

20. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
varies according to the type of test administered
narrow beam
infrared

21. Almost all of the formulas for calculating IOL power...
blink
are based on the same general equation
reflex tears
reading disabilities

22. If a biometry instrument fails to calibrate properly - one should...
having them trace the number/figure
reflex tears
white to white corneal diameter
remove the instrument from use

23. It is important to estimate the anterior chamber depth prior to dilation because...
2.0 or more
both eyes equally
refractive surgery
narrow angles may precipitate an angle-closure glaucoma attack

24. Schirmer's test I is used to measure...
reflex tears
the cobalt blue filter
shortened axial length due to compression
severe dry eye

25. A TBUT of which of the following would indicate tear film dysfunction?
a staining agent
patients who have had corneal refractive surgery
10 seconds
2 to 3 seconds

26. Color vision defects in children are frequently detected among those with...
reading disabilities
IOL power
expensive equipment
corneal endothelial drop-out

27. The average central thickness of the human cornea is...
545 pm
having them trace the number/figure
the use of an anesthetic
more males than females

28. When calculating intraocular lens (IOL) powers - one must enter...
reflex tears
a narrow angle and bowed iris cast a shadow on the iris
the defect tends to remain stable over time
desired postoperative refraction

29. Hereditary color vision defects affect...
more males than females
the defect tends to remain stable over time
tear filter papers
is acceptable

30. A normally functioning lacrimal gland will produce by much wetting on a Schirmer's test strip after 5 minutes?

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31. When should a child have his or her color vision checked?
A-constant
both eyes equally
before starting school
545 pm

32. The axial length of an average adult eye is...
ultrasound
23 to 24 mm
3.0 D
patient wearing spectacles

33. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
differentiate between congenital or acquired color blindness
patient wearing spectacles
decrease in vision due to glare conditions
IOL power

34. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
23 to 24 mm
a malingerer may invent a number - thus identifying him- or herself
shine the light flatly from the side - in the plane of the iris
the defect tends to remain stable over time

35. The IOLMaster eliminates which of the following sources of error?
a tall - central spike with only one peak and smaller spikes on either site
'test eye'
shortened axial length due to compression
severe dry eye

36. The IOLMaster must be calibrated daily using a...

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37. Which of the following should be color-vision tested one eye at a time?
normal tearing
suspected acquired color defect
'test eye'
are based on the same general equation

38. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
can often be cured if the causative factor is eliminated
central corneal thickness
a staining agent

39. Before proceeding with the actual color plate test...
patient wearing spectacles
the patient is shown a sample that is discernable to normal and abnormal alike
posterior subcapsular cataract
central corneal thickness

40. When positioning the IOLMaster for the axial length reading...
the use of an anesthetic
is acceptable
reflex tears
focus can he moved off-axis to obtain a clear reading

41. This is not evaluated using rose Bengal except...
patient wearing spectacles
reflex tears
corneal endothelial drop-out
is acceptable

42. Measuring corneal thickness via nonoptical pachymetry involves the use of...
holding the probe perpendicular to the corneal surface
that the sound beam is directed to the optic disc and the measurement is incorrect
ultrasound
23 to 24 mm

43. The manufacturer of a given IOL often supplies a specific number that must be entered into the IOL calculations when the lens is to be used. This number is refer to as a(n)...
A-constant
2.0 or more
10 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect

44. Laser interferometry uses which type of laser light?
Allow the patient to adjust to the light level before reading the letters.
545 pm
posterior subcapsular cataract
infrared

45. When comparing the axial lengths of a patient's left and right eye - how much of a difference between the eyes should signal you to repeat the measurement of both eyes?
0.3 mm
dacryocystitis
for screening purposes - such as job applications
the appearance of dry spots

46. When using a penlight to estimate anterior chamber depth - an open angle would appear...
the defect tends to remain stable over time
a tall - central spike with only one peak and smaller spikes on either site
the cobalt blue filter
to have little or no shadow

47. Which eye structure is responsible for color vision?
refractive error
expensive equipment
rods
normal tearing

48. Young children can be tested using the color plates by...
having them trace the number/figure
20
a malingerer may invent a number - thus identifying him- or herself
reading disabilities

49. Hereditary color vision defects usually affect...
normal tearing
both eyes equally
varies according to the type of test
red - green - and blue

50. A color plate that shows no obvious number to normal and abnormal alike is useful because...
varies according to the type of test
a malingerer may invent a number - thus identifying him- or herself
A-constant
2.0 or more