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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. With the 1OLMaster - the ideal signal-to-noise ratio is...
refractive surgery
2.0 or more
545 pm
the cobalt blue filter

2. Rose bengal is...
corneal endothelial drop-out
one-fourth
a narrow angle and bowed iris cast a shadow on the iris
a staining agent

3. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
corneal endothelial drop-out
posterior subcapsular cataract
narrow beam
a staining agent

4. Illumination for the color plates test...
tear filter papers
before starting school
patients who have had corneal refractive surgery
varies according to the type of test administered

5. 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...
the cobalt blue filter
one-fourth
varies according to the type of test
that the sound beam is directed to the optic disc and the measurement is incorrect

6. Laser interferometry uses which type of laser light?
is acceptable
infrared
patient wearing spectacles
varies according to the type of test

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

8. Measuring time for the Schirmer's test is...
suspected acquired color defect
5 minutes
holding the probe perpendicular to the corneal surface
expensive equipment

9. _______ are not used in evaluating tear break-up time (TBUT)
pressing on the globe too hard with the probe
tear filter papers
blink
more males than females

10. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
the patient is shown a sample that is discernable to normal and abnormal alike
posterior subcapsular cataract
patient wearing spectacles
shine the light flatly from the side - in the plane of the iris

11. When calculating intraocular lens (IOL) powers - one must enter...
varies according to the type of test administered
desired postoperative refraction
narrow beam
central corneal thickness

12. An A-Sean can he artificially shortened due to...
shortened axial length due to compression
a tall - central spike with only one peak and smaller spikes on either site
narrow angles may precipitate an angle-closure glaucoma attack
pressing on the globe too hard with the probe

13. A color plate that shows no obvious number to normal and abnormal alike is useful because...
refractive surgery
both eyes equally
3.0 D
a malingerer may invent a number - thus identifying him- or herself

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

15. Before proceeding with the actual color plate test...
can often be cured if the causative factor is eliminated
white to white corneal diameter
the patient is shown a sample that is discernable to normal and abnormal alike
'test eye'

16. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
focus can he moved off-axis to obtain a clear reading
with the central cornea
to have little or no shadow

17. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
for screening purposes - such as job applications
545 pm
varies according to the type of test

18. When performing pachymetry prior to refractive surgery - it is generally best to begin...
posterior subcapsular cataract
the defect tends to remain stable over time
refractive error
with the central cornea

19. Hereditary color vision defects usually affect...
reading disabilities
both eyes equally
red-green
a narrow angle and bowed iris cast a shadow on the iris

20. Color vision defects in children are frequently detected among those with...
infrared
reading disabilities
the defect tends to remain stable over time
refractive error

21. In evaluating an axial length scan - the retinal echo must be...
differentiate between congenital or acquired color blindness
to the left of the scleral and orbital echoes
the patient is shown a sample that is discernable to normal and abnormal alike
a malingerer may invent a number - thus identifying him- or herself

22. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
3.0 D
reading disabilities
A Schirmer's test of 10 mm or more is considered normal.

23. 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?
normal tearing
rods
0.3 mm
the appearance of dry spots

24. 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)...
the use of an anesthetic
desired postoperative refraction
A-constant
differentiate between congenital or acquired color blindness

25. The axial length of an average adult eye is...
3.0 D
before starting school
both eyes equally
23 to 24 mm

26. It is important to estimate the anterior chamber depth prior to dilation because...
patient wearing spectacles
shortened axial length due to compression
a staining agent
narrow angles may precipitate an angle-closure glaucoma attack

27. Just prior to the beginning of the TBUT test - the patient is instructed to...
5 minutes
focus can he moved off-axis to obtain a clear reading
are based on the same general equation
blink

28. A TBUT of which of the following would indicate tear film dysfunction?
with the central cornea
5 minutes
red - green - and blue
10 seconds

29. The IOLMaster evaluates each of the following except...
remove the instrument from use
that the sound beam is directed to the optic disc and the measurement is incorrect
one-fourth
refractive error

30. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
shortened axial length due to compression
refractive surgery
reading disabilities

31. When positioning the IOLMaster for the axial length reading...
3.0 D
IOL power
focus can he moved off-axis to obtain a clear reading
a staining agent

32. When using a penlight to estimate anterior chamber depth - an open angle would appear...
expensive equipment
to have little or no shadow
Allow the patient to adjust to the light level before reading the letters.
desired postoperative refraction

33. How long should the patient be given to recognize the figure in a color plate?
the use of an anesthetic
2 to 3 seconds
shine the light flatly from the side - in the plane of the iris
the patient should be tested with near correction - if worn

34. Schirmer's test does not require _____ except Test strips
expensive equipment
with the central cornea
patient wearing spectacles
posterior subcapsular cataract

35. Which eye structure is responsible for color vision?
2.0 or more
the cobalt blue filter
rods
a staining agent

36. Hereditary color defects most often fall into which category?
desired postoperative refraction
focus can he moved off-axis to obtain a clear reading
red-green
A Schirmer's test of 10 mm or more is considered normal.

37. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
that the sound beam is directed to the optic disc and the measurement is incorrect
one-fourth
3.0 D
Allow the patient to adjust to the light level before reading the letters.

38. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the defect tends to remain stable over time
2 to 3 seconds
545 pm
Allow the patient to adjust to the light level before reading the letters.

39. Schirmer's test I is used to measure...
remove the instrument from use
to have little or no shadow
the cobalt blue filter
reflex tears

40. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shine the light flatly from the side - in the plane of the iris
IOL power
A Schirmer's test of 10 mm or more is considered normal.
before starting school

41. Pachymetry readings are routinely taken prior to...
the appearance of dry spots
severe dry eye
refractive surgery
decrease in vision due to glare conditions

42. Hereditary color vision defects affect...
remove the instrument from use
pressing on the globe too hard with the probe
A-constant
more males than females

43. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
posterior subcapsular cataract
reading disabilities
narrow beam

44. The average central thickness of the human cornea is...
545 pm
holding the probe perpendicular to the corneal surface
severe dry eye
'test eye'

45. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
severe dry eye
are based on the same general equation
narrow angles may precipitate an angle-closure glaucoma attack

46. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
3.0 D
before starting school
5 minutes

47. Acquired color vision defects...
a tall - central spike with only one peak and smaller spikes on either site
2 to 3 seconds
white to white corneal diameter
can often be cured if the causative factor is eliminated

48. When performing a brightness acuity glare test - it is best to do which of the following?
0.3 mm
545 pm
Allow the patient to adjust to the light level before reading the letters.
normal tearing

49. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
desired postoperative refraction
is acceptable
patients who have had corneal refractive surgery
more males than females

50. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
545 pm
infrared
the cobalt blue filter