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Certified Ophthalmic Assistant

Subjects : certifications, health-sciences

Instructions:

Answer 50 questions in 15 minutes.
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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. One of the keys in accurate pachymetry is...
are based on the same general equation
holding the probe perpendicular to the corneal surface
corneal endothelial drop-out
blink

2. The ideal IOLMaster axial length graph is...
the use of an anesthetic
focus can he moved off-axis to obtain a clear reading
a tall - central spike with only one peak and smaller spikes on either site
A-constant

3. The IOLMaster eliminates which of the following sources of error?
remove the instrument from use
the appearance of dry spots
focus can he moved off-axis to obtain a clear reading
shortened axial length due to compression

4. _______ are not used in evaluating tear break-up time (TBUT)
are based on the same general equation
can often be cured if the causative factor is eliminated
tear filter papers
shortened axial length due to compression

5. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
for screening purposes - such as job applications
infrared
remove the instrument from use
patient wearing spectacles

6. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
a malingerer may invent a number - thus identifying him- or herself
the defect tends to remain stable over time
shortened axial length due to compression
white to white corneal diameter

7. A rose bengal does not require the use of...
reading disabilities
white to white corneal diameter
the cobalt blue filter
varies according to the type of test administered

8. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
10 seconds
a malingerer may invent a number - thus identifying him- or herself
is acceptable

9. The IOLMaster evaluates each of the following except...
blink
holding the probe perpendicular to the corneal surface
that the sound beam is directed to the optic disc and the measurement is incorrect
refractive error

10. 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
'test eye'
the cobalt blue filter
with the central cornea

11. The Ishihara color plates are useful...
to the left of the scleral and orbital echoes
5 minutes
focus can he moved off-axis to obtain a clear reading
for screening purposes - such as job applications

12. Acquired color vision defects...
patient wearing spectacles
tear filter papers
red-green
can often be cured if the causative factor is eliminated

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

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14. Schirmer's test I is used to measure...
rods
reflex tears
5 minutes
a narrow angle and bowed iris cast a shadow on the iris

15. Estimating the anterior chamber depth with a penlight works because...
suspected acquired color defect
patients who have had corneal refractive surgery
a narrow angle and bowed iris cast a shadow on the iris
with the central cornea

16. Schirmer's test does not require _____ except Test strips
expensive equipment
to the left of the scleral and orbital echoes
2.0 or more
both eyes equally

17. A TBUT of which of the following would indicate tear film dysfunction?
refractive surgery
10 seconds
red-green
varies according to the type of test

18. In evaluating an axial length scan - the retinal echo must be...
severe dry eye
before starting school
reflex tears
to the left of the scleral and orbital echoes

19. The axial length of the eye is important in the calculation of...
infrared
for screening purposes - such as job applications
IOL power
23 to 24 mm

20. The average central thickness of the human cornea is...
severe dry eye
545 pm
2 to 3 seconds
a staining agent

21. Which eye structure is responsible for color vision?
expensive equipment
rods
red-green
corneal endothelial drop-out

22. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
having them trace the number/figure
A Schirmer's test of 10 mm or more is considered normal.
infrared
is acceptable

23. Rose bengal is...
tear filter papers
a staining agent
holding the probe perpendicular to the corneal surface
IOL power

24. The photosensitive pigments of the eye are sensitive to...
reading disabilities
dacryocystitis
narrow beam
red - green - and blue

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

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26. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
blink
is acceptable
that the sound beam is directed to the optic disc and the measurement is incorrect
3.0 D

27. Hereditary color defects most often fall into which category?
varies according to the type of test
a tall - central spike with only one peak and smaller spikes on either site
red-green
desired postoperative refraction

28. 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...
that the sound beam is directed to the optic disc and the measurement is incorrect
patients who have had corneal refractive surgery
a staining agent
2 to 3 seconds

29. Pachymetry readings are routinely taken prior to...
refractive surgery
narrow beam
red - green - and blue
decrease in vision due to glare conditions

30. The difference between Schirmer's test I and II is...
the patient should be tested with near correction - if worn
2.0 or more
the use of an anesthetic
dacryocystitis

31. When positioning the IOLMaster for the axial length reading...
infrared
for screening purposes - such as job applications
focus can he moved off-axis to obtain a clear reading
the use of an anesthetic

32. Schirmer's test II is used to measure...
normal tearing
varies according to the type of test
central corneal thickness
rods

33. An A-Sean can he artificially shortened due to...
red-green
patient wearing spectacles
normal tearing
pressing on the globe too hard with the probe

34. 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?
10 seconds
0.3 mm
20
reading disabilities

35. How long should the patient be given to recognize the figure in a color plate?
20
corneal endothelial drop-out
central corneal thickness
2 to 3 seconds

36. Illumination for the color plates test...
are based on the same general equation
0.3 mm
that the sound beam is directed to the optic disc and the measurement is incorrect
varies according to the type of test administered

37. This is not evaluated using rose Bengal except...
reading disabilities
corneal endothelial drop-out
patient wearing spectacles
shortened axial length due to compression

38. Measuring corneal thickness via nonoptical pachymetry involves the use of...
shortened axial length due to compression
to the left of the scleral and orbital echoes
reflex tears
ultrasound

39. Glare testing is used to identify...
decrease in vision due to glare conditions
23 to 24 mm
to have little or no shadow
red - green - and blue

40. Color vision defects in children are frequently detected among those with...
A-constant
to the left of the scleral and orbital echoes
red - green - and blue
reading disabilities

41. When using color plates - a score indicates abnormal color vision...
normal tearing
varies according to the type of test
remove the instrument from use
are based on the same general equation

42. Almost all of the formulas for calculating IOL power...
patients who have had corneal refractive surgery
red-green
are based on the same general equation
one-fourth

43. When calculating intraocular lens (IOL) powers - one must enter...
blink
desired postoperative refraction
shine the light flatly from the side - in the plane of the iris
20

44. A color plate that shows no obvious number to normal and abnormal alike is useful because...
central corneal thickness
a malingerer may invent a number - thus identifying him- or herself
one-fourth
dacryocystitis

45. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the patient is shown a sample that is discernable to normal and abnormal alike
refractive surgery
3.0 D
patients who have had corneal refractive surgery

46. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
is acceptable
normal tearing
one-fourth

47. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
A-constant
remove the instrument from use
for screening purposes - such as job applications

48. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
the appearance of dry spots
refractive error
central corneal thickness

49. When performing a brightness acuity glare test - it is best to do which of the following?
corneal endothelial drop-out
focus can he moved off-axis to obtain a clear reading
dacryocystitis
Allow the patient to adjust to the light level before reading the letters.

50. In which of the following would glare testing be most appropriate?
reflex tears
suspected acquired color defect
posterior subcapsular cataract
23 to 24 mm

Can you answer 50 questions in 15 minutes?

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Certified Ophthalmic Assistant

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