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...
pressing on the globe too hard with the probe
decrease in vision due to glare conditions
2.0 or more
the patient is shown a sample that is discernable to normal and abnormal alike

2. Which eye structure is responsible for color vision?
3.0 D
a staining agent
shine the light flatly from the side - in the plane of the iris
rods

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

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4. Rose bengal is...
a staining agent
ultrasound
severe dry eye
IOL power

5. The average central thickness of the human cornea is...
desired postoperative refraction
severe dry eye
545 pm
narrow angles may precipitate an angle-closure glaucoma attack

6. Schirmer's test I is used to measure...
a narrow angle and bowed iris cast a shadow on the iris
red-green
reflex tears
expensive equipment

7. Color vision defects in children are frequently detected among those with...
a staining agent
reading disabilities
focus can he moved off-axis to obtain a clear reading
differentiate between congenital or acquired color blindness

8. Hereditary color vision defects usually affect...
both eyes equally
shine the light flatly from the side - in the plane of the iris
posterior subcapsular cataract
reflex tears

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

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10. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
Allow the patient to adjust to the light level before reading the letters.
the patient should be tested with near correction - if worn
with the central cornea

11. How long should the patient be given to recognize the figure in a color plate?
is acceptable
2 to 3 seconds
2.0 or more
shine the light flatly from the side - in the plane of the iris

12. A rose bengal does not require the use of...
A Schirmer's test of 10 mm or more is considered normal.
the cobalt blue filter
varies according to the type of test
both eyes equally

13. The ideal IOLMaster axial length graph is...
blink
A-constant
5 minutes
a tall - central spike with only one peak and smaller spikes on either site

14. It is important to estimate the anterior chamber depth prior to dilation because...
reflex tears
for screening purposes - such as job applications
narrow angles may precipitate an angle-closure glaucoma attack
Allow the patient to adjust to the light level before reading the letters.

15. When should a child have his or her color vision checked?
red - green - and blue
red-green
the patient should be tested with near correction - if worn
before starting school

16. _______ are not used in evaluating tear break-up time (TBUT)
a malingerer may invent a number - thus identifying him- or herself
tear filter papers
differentiate between congenital or acquired color blindness
the patient is shown a sample that is discernable to normal and abnormal alike

17. Before proceeding with the actual color plate test...
shortened axial length due to compression
are based on the same general equation
the patient is shown a sample that is discernable to normal and abnormal alike
can often be cured if the causative factor is eliminated

18. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
varies according to the type of test
blink
normal tearing

19. 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-constant
the patient should be tested with near correction - if worn
that the sound beam is directed to the optic disc and the measurement is incorrect
blink

20. 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?
refractive surgery
20
0.3 mm
expensive equipment

21. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
reading disabilities
having them trace the number/figure
one-fourth

22. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
pressing on the globe too hard with the probe
decrease in vision due to glare conditions
tear filter papers

23. The IOLMaster eliminates which of the following sources of error?
with the central cornea
differentiate between congenital or acquired color blindness
shortened axial length due to compression
both eyes equally

24. Pachymetry readings are routinely taken prior to...
the patient should be tested with near correction - if worn
white to white corneal diameter
refractive surgery
20

25. When positioning the IOLMaster for the axial length reading...
decrease in vision due to glare conditions
the use of an anesthetic
for screening purposes - such as job applications
focus can he moved off-axis to obtain a clear reading

26. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
the defect tends to remain stable over time
varies according to the type of test
20
infrared

27. Hereditary color vision defects affect...
IOL power
A Schirmer's test of 10 mm or more is considered normal.
red-green
more males than females

28. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
that the sound beam is directed to the optic disc and the measurement is incorrect
patients who have had corneal refractive surgery
a tall - central spike with only one peak and smaller spikes on either site

29. The difference between Schirmer's test I and II is...
the use of an anesthetic
the defect tends to remain stable over time
Allow the patient to adjust to the light level before reading the letters.
pressing on the globe too hard with the probe

30. A color plate that shows no obvious number to normal and abnormal alike is useful because...
a malingerer may invent a number - thus identifying him- or herself
before starting school
varies according to the type of test administered
the use of an anesthetic

31. Schirmer's test II is used to measure...
rods
normal tearing
can often be cured if the causative factor is eliminated
central corneal thickness

32. The type of pachymetry used to evaluate a glaucoma suspect is...
patients who have had corneal refractive surgery
the use of an anesthetic
reading disabilities
central corneal thickness

33. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
the defect tends to remain stable over time
patient wearing spectacles
3.0 D
5 minutes

34. When calculating IOL power - each of the following are necessary except...
a tall - central spike with only one peak and smaller spikes on either site
A Schirmer's test of 10 mm or more is considered normal.
white to white corneal diameter
a malingerer may invent a number - thus identifying him- or herself

35. In slit-lamp assessment of the corneal periphery - the dark interval should be a minimum of approximately how much of the total corneal width for the angle to he considered open and safe for dilation?
corneal endothelial drop-out
infrared
suspected acquired color defect
one-fourth

36. Which of the following should be color-vision tested one eye at a time?
a malingerer may invent a number - thus identifying him- or herself
suspected acquired color defect
5 minutes
refractive error

37. 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)...
patient wearing spectacles
A-constant
for screening purposes - such as job applications
23 to 24 mm

38. The Ishihara color plates are useful...
2.0 or more
for screening purposes - such as job applications
0.3 mm
dacryocystitis

39. Young children can be tested using the color plates by...
having them trace the number/figure
the use of an anesthetic
narrow angles may precipitate an angle-closure glaucoma attack
narrow beam

40. Measuring time for the Schirmer's test is...
the cobalt blue filter
5 minutes
holding the probe perpendicular to the corneal surface
0.3 mm

41. Illumination for the color plates test...
varies according to the type of test administered
ultrasound
a staining agent
are based on the same general equation

42. One of the keys in accurate pachymetry is...
before starting school
holding the probe perpendicular to the corneal surface
red - green - and blue
dacryocystitis

43. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
is acceptable
infrared
patient wearing spectacles
red-green

44. 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
to have little or no shadow
normal tearing
20

45. The IOLMaster evaluates each of the following except...
the patient should be tested with near correction - if worn
one-fourth
refractive error
reading disabilities

46. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
10 seconds
blink
the use of an anesthetic

47. When performing pachymetry prior to refractive surgery - it is generally best to begin...
expensive equipment
refractive surgery
with the central cornea
0.3 mm

48. Glare testing is used to identify...
remove the instrument from use
decrease in vision due to glare conditions
is acceptable
0.3 mm

49. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
red-green
dacryocystitis
desired postoperative refraction

50. Just prior to the beginning of the TBUT test - the patient is instructed to...
suspected acquired color defect
infrared
IOL power
blink